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Market concentration

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market concentration and efficiency, such that firms display an increase in efficiency when their relevant market concentration decreases. The above positions of Bain (1956) as well as Collins and Preston (1969) are not only supportive of collusion but also of the efficiency-profitability hypothesis: profits are higher for bigger firms within a greater concentrated market as this concentration signifies greater efficiency through mass production. In particular, economies of scale was the greatest kind of efficiency that large firms could achieve in influencing their costs, granting them greater market share. Notably however, Rosenbaum (1994) observed that most studies assumed the relationship between actual market share and observed profitability by following the implication that large firms hold greater market share due to their efficiency, demonstrating that the relationship between these efficiency and market share is not clearly defined.
1953:. Originally, the Lorenz curve measured the inequality of income distributed with a population and ranked individuals from highest to lowest earnings. Therefore, in this context the Gini coefficient is located between the 45° line representing an equal distribution of income and the Lorenz curve representing the actual distribution of income within the population. In a market concentration context, the Lorenz curve can be plotted ranking firms' market shares from smallest to largest to simulate a concentration curve. The firms’ cumulative percentage shares would remain on the y axis and the cumulative percentage of sellers would remain on the x axis. 42: 676: 1073:
consensus. For example, a negative correlation was established by Connelly and Hirschey (1984) who explained that the correlation evidenced a decreased expenditure on R&D by oligopolistic firms to benefit from greater monopolised profits. However, Blundell et al. observed a positive correlation by tallying the patents lodged by firms. This general observation was also shared by Aghion et al. in 2005.
1105: 1023:. Collins and Preston (1969) shared a similar view to Bain with focus on the reduced competitive impact of smaller firms upon larger firms. Demsetz held an alternative view where he found a positive relationship between the margins of specifically the largest firms within a concentrated industry and collusion as to pricing. 705:, it is calculated. It can be used to assess the market's strength over both the short and long haul. Generally speaking, a CR of less than 40% and a CR of more than 60% are regarded as modest and high levels of market concentration, respectively. This ratio measures the concentration of the largest firms in the form 1061:(1950) first recognised the relationship between market concentration and innovation in that a higher concentrated market would facilitate innovation. He reasoned that firms with the greatest market share have the greatest opportunity to benefit from their innovations, particularly through investment into 1083:
Research presented by Aghion et al. (2005) suggested an inverted U-shape model that represents the relationship between market concentration and innovation. Delbono and Lambertini modelled empirical evidence onto a graph and found that the pattern demonstrated by the data supported the existence of a
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Although theoretical models predict a strong correlation between market concentration and collusion, there is little empirical evidence linking market concentration to the level of collusion in an industry. In the scenario of a merger, some studies have also shown that the asymmetric market structure
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is due to the necessity of maintaining market competition in order to avoid the formation of monopolies. These laws typically require firms to report their market share and limit the degree of market concentration that is allowed. In some cases, antitrust laws may require the breakup of firms or the
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In practice, there are complications in observing the direct correlation between market concentration and its effect on. In collecting empirical evidence, issues have also arisen as to how innovation, a firm's control and gaps between R&D and firm size are measured. There has also been a lack of
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The Gini coefficient measures the difference between firms' sizes without including the number of firms operating in a market. This is known as a relative concentration measure and differs from absolute concentration measures (like the Rosenbluth index) which includes the number of firms and firms'
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The Rosenbluth index assigns more weight to smaller competitors when there are more firms present in the marketplace, and is sensitive to the amount of competitors in the market, even if there is a small amount of large firms dominating. Its coefficients and ranking are similar to results produced
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except that greater weight is assigned to the share of the largest firm. When compared to the HHI index, it does present some advantages, such as giving more weight to the quantity of small firms, however the arbitrary choice to only include the absolute value of one firm has led to criticism over
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For a given set of nodes, each with degree k, the power-law exponent (α) serves as a pivotal metric for analyzing concentration within a network. This exponent characterizes the distribution of out-degrees among nodes, offering insights into the concentration of certain attributes or interactions
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As an economic tool market concentration is useful because it reflects the degree of competition in the market. Understanding the market concentration is important for firms when deciding their marketing strategy. As well, empirical evidence shows that there exists an inverse relationship between
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firms. Although it doesn't capture the peripheral firms like the HHI formula, it works to capture the "core" of the market, and measure the degree of inequality between the size variable accounted for by various sib-samples of firms. This index does assume pre-calculation on the users' behalf to
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A simple measure of market concentration is to calculate 1/N where N is the number of firms in the market. A result of 1 would indicate a pure monopoly, and will decrease with the number of active firms in the market, and nonincreasing in the degree of symmetry between them. This measure of
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A high level of market concentration can lead to a decrease in competition and increased market power for the dominant firms. This might lead to greater costs, less quality, fewer options, and less innovation. Thus, consumers and society may be negatively impacted by large levels of market
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is a constant or a parameter (to be estimated empirically) and N is the number of firms. Davies (1979) suggests that a concentration index should in general depend on both N and the inequality of firms' shares. Davis (1980) indicates, there are many suitable candidates to be used for
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If market shares are expressed as decimals, an HHI of 0 represents a perfectly competitive industry while an HHI index of 1 represents a monopolised industry. Regardless whether the decimal or percentage HHI is used, a higher HHI indicates higher concentration within a market.
1108:. A high degree of market concentration is typically undesirable since it might result in less competition and more power for the leading enterprises on the market. Antitrust laws and other economic regulations safeguard market competition and the avoidance of monopolies. 1478: 1080:”. Petit and Teece (2021) argued that technological opportunities, a variable which Schumpeter and Arrow did not include during their time, would be included in this definition as it enables new entrants to make a “breakthrough” into the industry. 956:
in 2001, was approved in the United States, however the condition's that European Commission enforced for the approval were too impactful for General Electric, and was abandoned. This is an example on how different regulatory bodies view
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would the sum of weighted market share located in the area above the concentration curve. The Gini coefficient is 0 when the concentration curve aligns with the 45° line representing a single firm's market share, meaning the market is a
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between firms which, resulting in higher pricing. In contrast, market concentration occurs as a result of the efficiency obtained in the course of being a large firm, which is more profitable in comparison to smaller firms and their
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companies, respectively) attempted 2014 merger was blocked by the US DOJ, after fears that the merger would increase costs for oil companies in 23 separate product markets, and therefore would stiffen innovation in the oil
1019:. Bain's (1956) original concern with market concentration was based on an intuitive relationship between high concentration and collusion which led to Bain's finding that firms in concentrated markets should be earning 1069:(1962) that a greater market concentration will decrease incentive to innovate because a firm within a monopoly or monopolistic market would have already reached profit levels that greatly exceed costs. 1944: 1721: 930:
threatened to file an antitrust lawsuit, citing that the HHI of the national television industry would increase by 639 points to a HHI of 2454, and feared this merger would lead to increased prices for
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determined that any merger that increases the HHI by more than 200 proposes a legitimate concern to antitrust laws and consumer welfare . Therefore, when considering potential mergers, especially in
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applications, antitrust agencies will consider the whether the increase in efficiency is worth the potential decrease in consumer welfare, through increased costs or reduction in quantity produced.
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market shares. A higher HHI indicates a higher level of market concentration. A market concentration level of less than 1000 is typically seen as low, whilst one of more than 1500 is regarded as
319:. Market concentration is the portion of a given market's market share that is held by a small number of businesses. To ascertain whether an industry is competitive or not, it is employed in 792: 1838: 1312: 1773: 616: 1995: 876:. The first major example of the Sherman Act being imposed on a company to prevent potential consumer abuse through excessive market concentration was in the 1911 court case of 1298:
Terrence Kavyu Muthoka defines distribution just as functionals in the Swartz space which is the space of functions with compact support and with all derivatives existing. The
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and firms, through defining the product and geographical parameters, various metrics can be employed to determine the market concentration. This can be quantified using the
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Although not as common as the Herfindahl–Hirschman Index or Concentration Ratio metrics, various alternative measures of market concentration can also be used.
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J. Gregory Sidak, Evaluating Market Power Using Competitive Benchmark Prices Instead of the Hirschman-Herfindahl Index, 74 ANTITRUST L.J. 387, 387-388 (2007).
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concentration ignores the dispersion among the firms' shares. This measure is practically useful only if a sample of firms' market shares is believed to be
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Modern regulatory bodies state that an increase in market concentration can inhibit innovation, and have detrimental effects on overall consumer welfare.
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Although fewer competitors doesn't always indicate high market concentration, it can be a strong indicator of the market structure and power allocation.
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and current advertising levels. There are also firm specific factors affecting market concentration, including: research and development levels, and the
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is likely to exist. In most cases, high market concentration produces undesirable consequences such as reduced competition and higher prices.
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Conversely, as α decreases below 0, the concentration among a select few firms diminishes further, suggesting a diversified market landscape.
549:(HHI) (the most commonly used market concentration) is added portion of market attentiveness. It is derived by adding the squares of all the 342:, employment numbers, active users or other relevant indicators. In theory and in practice, market concentration is closely associated with 2973: 434:
The 2020 Australian Telecommunications firms market share: an example of a highly concentrated market with an estimated HHI of 3034.
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Schumpeter also failed to distinguish between the different technologies that contribute to innovation and did not properly define “
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produced by a merger will negatively affect collusion despite the increased concentration of the market that occurs post-merger.
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is the market share of firm i, conventionally expressed as a percentage, and N is the number of firms in the relevant market.
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and economic regulation. When market concentration is high, it indicates that a few firms dominate the market and oligopoly or
17: 2634: 3277: 1015: 927: 898: 655: 3460: 3395: 3200:"Possibilities of Application of the Index Concentration of Linda in Small Economy: Example of Serbian Food Industries" 942: 1473:{\displaystyle L={\frac {1}{N(N-1)}}\sum _{i=1}^{N-1}Q_{i}\left\left\vert {\frac {CR_{i}}{CR_{n}-CR_{i}}}\right\vert } 4245: 3382: 388:
Market concentration is related to industrial concentration, which concerns the distribution of production within an
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and existing competition. Market concentration ratios also allows users to more accurately determine the type of
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was monopolising the petroleum industry, the court-ordered remedy was the breakup into 34 smaller companies.
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As α approaches 0, the distribution flattens, indicating a more equitable distribution of contract awards.
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Market concentration reveals a market's degree of concentration. It is employed to ascertain the level of
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agencies regularly use market concentration as an important metric to evaluate potential violations of
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An alternative economic interpretation is that market concentration is a criterion that can be used to
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When α>0, a skewed distribution emerges where a small percentage of firms dominate the market.
477: 393: 3159:"Innovation and product market concentration: Schumpeter, arrow, and the inverted U-shape curve" 2119:"What is Market Concentration? Definition of Market Concentration, Market Concentration Meaning" 4194: 3992: 3618: 3538: 3453: 2287: 995:) that predict that an increase in market concentration will result in higher prices and lower 913: 902: 523: 304: 168: 2166: 1198:
is an accepted measure of inequality (in practice the coefficient of variation is suggested),
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Function of number of companies & their respective shares of total production in a market
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can be divided into two arguments: greater market concentration increases the likelihood of
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Modern examples of market concentration being utilised to protect consumer welfare include:
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There are various factors that affect the concentration of specific markets which include;
389: 211: 206: 3623: 3037: 2660:"Why the Time Warner-Comcast merger isn't going to happen—at least the way it looks today" 8: 4163: 4073: 4068: 4058: 4048: 3972: 3869: 3671: 3553: 3548: 3115: 2569: 2464: 2424: 2040: 2007: 1512: 1009: 976: 909: 694: 370: 4012: 3944: 3603: 3066:"The Stock Market's Valuation of R&D and Market Concentration in Horizontal Mergers" 2190: 419:' shares of the total production (alternatively, total capacity or total reserves) in a 4179: 4043: 3954: 3859: 3799: 3518: 3483: 3377: 3093: 3085: 3019: 2955: 2947: 2908: 2866: 2858: 2819: 2765: 2757: 2616: 2527: 2335: 2142: 1568: 1492: 1201: 967: 550: 469: 420: 343: 334:
measures the concentration of the top firms in the market, this can be through various
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Schmalensee, Richard (1987). "Inter-Industry Studies of Structure and Performance".
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However, there is little empirical evidence of regulatory usage of the Linda Index.
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is entitled "Market Definition, Measurement and Concentration" and states that the
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and other regulatory issues. Market concentration is important in determining firm
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Department of Justice and Federal Trade Commission Horizontal Merger Guidelines
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of the total production (alternatively, total capacity or total reserves) in a
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The "number of effective competitors" is the inverse of the Herfindahl index.
1066: 864:, in response to growing monopolies and anti-competitive firms in the 1880s, 481: 473: 335: 221: 189: 2499: 4128: 4118: 3962: 3934: 3909: 3774: 3701: 3676: 3573: 2231: 2065: 1950: 938: 883: 698: 697:(CR) is a measure of how concentrated a market is. By dividing the overall 355: 312: 235: 148: 99: 3438: 3174: 3132: 4158: 4133: 3844: 3739: 3686: 3493: 3364:
Curry, B. and K. D. George (1983). "Industrial concentration: A survey"
3199: 2974:"Highly concentrated markets are bad for consumers and bad for investors" 988: 934: 916:, which post merger HHI is under 2000 (except in special circumstances). 405: 397: 158: 3183: 3089: 3065: 2951: 2927: 2761: 2737: 1101:
establishment of “firewalls” that prevent the potential abuse of power.
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Relationship between Market Structure and Market Concentration Metrics
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Market concentration is affected through various forces, including
63: 2425:"Herfindahl-Hirschman Index - United States Department of Justice" 1845: 702: 515: 511:, rather than determined by the firms' inherent characteristics. 412: 672:
is the measure of concentration that these Guidelines will use.
530:) can be used as a market concentration criterion. Examples are 1780:(d) The Rosenbluth (1961) index (also Hall and Tideman, 1967): 1004: 508: 143: 3198:
Bukvić, Rajko; Pavlović, Radica; Gajić, Аlеksаndаr M. (2014).
2589:"Market Concentration, Economic Welfare, and Antitrust Policy" 2500:"Market Concentration, Economic Welfare, and Antitrust Policy" 2113: 2111: 2684:"Halliburton and Baker Hughes Abandon Anticompetitive Merger" 2214:
Turner, Scott F.; Mitchell, Will; Bettis, Richard A. (2010).
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is the share of the largest firm. The index is similar to
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distribution sizes. It is used in conjunction with the
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2014 Attempted purchase of Time Warner Cable by Comcast
1620:(c) Comprehensive concentration index (Horwath 1970): 2893:
Brookings Papers on Economic Activity. Microeconomics
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is the ratio between the average share of the first
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Markets for Managers: A Managerial Economics Primer
1084:U-shaped relationship between these two variables. 1007:(i.e. explicit collusion) is absent. Examples are 396:, market concentration may be used as a measure of 2738:"Efficiency v. Collusion: Evidence Cast in Cement" 2366: 1989: 1938: 1852:through the use of the Herfindahl-Hirschman Index. 1832: 1767: 1715: 1608: 1577: 1557: 1527: 1501: 1472: 1284: 1238: 1210: 1190: 1163: 966:The relationship between market concentration and 786: 639: 610: 3266: 3225: 3156: 3059: 3057: 2546:"Standard Oil | History, Monopoly, & Breakup" 2369:"Market Concentration: The Effects of Technology" 4237: 2731: 2729: 2639:Official Journal C 031, 05/02/2004, p. 0005-0018 3307:Research Centre International Economics, Vienna 2926:Fonseca, Miguel A.; Normann, Hans-Theo (2008). 2587:Brock, James W.; Obst, Norman P. (2007-10-03). 2498:Brock, James W.; Obst, Norman P. (2009-03-01). 1565:is the concentration coefficient for the first 1092:The existence of economic regulations like the 879:Standard Oil Co. of New Jersey v. United States 701:by the sum of the market shares of the largest 3361:Cambridge, Massachusetts: Harvard Univ. Press. 3228:"Additive measurement of Market Concentration" 3054: 2925: 2797: 1016:Bertrand oligopoly for differentiated products 787:{\displaystyle CR_{n}=C_{1}+C_{2}+.....+C_{n}} 3454: 3226:Romualdas, Stasys, Ginevičius, Čirba (2009). 3109: 3107: 2726: 2006:exponent (α) of the fitting curve on the out- 1833:{\displaystyle R={\frac {1}{2\sum is_{i}-1}}} 1509:firms and the average share of the remaining 541: 514:Any criterion that can be used to compare or 276: 3326:Journal of Industrial and Business Economics 3258:: CS1 maint: multiple names: authors list ( 3232:Journal of Business Economics and Management 2798:Collins, Norman R.; Preston, Lee E. (1969). 2352:: CS1 maint: multiple names: authors list ( 404:in the industry, for example in the work of 400:, theorized to be positively related to the 3468: 3371: 3320:Pliatsidis, Andreas Christos (2024-02-12). 2800:"Price-Cost Margins and Industry Structure" 2782: 2385:: CS1 maint: numeric names: authors list ( 684:https://www.youtube.com/watch?v=jMJCLwBJYnQ 3461: 3447: 3423:Cambridge, Massachusetts : MIT Press. 3319: 3275: 3157:Delbono, Flavio; Lambertini, Luca (2022). 3113: 3104: 3063: 2593:Journal of Industry, Competition and Trade 2504:Journal of Industry, Competition and Trade 1768:{\displaystyle 2{\text{H}}-\sum s_{i}^{3}} 611:{\displaystyle H=\sum _{i=1}^{N}s_{i}^{2}} 283: 269: 3243: 3182: 3141: 3131: 2735: 2586: 2497: 2239: 991:models of market interaction (e.g. among 244:Enforcement authorities and organizations 3114:Petit, Nicolas; Teece, David J. (2021). 2883: 2657: 2453:. John Wiley & Sons Ltd. p. 69. 1302:or the Dirac function is a good example. 674: 346:, and therefore is important to various 3150: 2836: 2574:The United States Department of Justice 961: 14: 4238: 4190:English historical school of economics 4144:Structure–conduct–performance paradigm 3414:The Theory of Industrial Organization. 3004:The Review of Economics and Statistics 2997: 2804:The Review of Economics and Statistics 1111: 688: 427:Factors affecting market concentration 3442: 3297: 3221: 3219: 2707: 2448: 941:(at the time the 2nd and 3rd largest 796:where N is usually between 3 and 5. 3416:Cambridge, Massachusetts: MIT Press. 2367:Janashvili '02, David (2002-04-26). 2313: 2309: 2307: 1045:Implications of market concentration 822:6000 - 10 000 (Depending on Region) 2785:Handbook of Industrial Organization 1990:{\displaystyle {\frac {(2i-1)}{N}}} 1039: 899:United States Department of Justice 855: 850: 350:agencies when considering proposed 24: 3216: 2658:Fernholz, Tim (13 February 2014). 2320:The Quarterly Journal of Economics 2010:of the network (Pliatsidis, 2024) 1088:Regulation of market concentration 833:2000 - 6000 (Depending on Region) 358:in setting prices and quantities. 40: 25: 4267: 3427: 3383:Concise Encyclopedia of Economics 3285:Economic Research Southern Africa 3245:10.3846/1611-1699.2009.10.191-198 3070:Review of Industrial Organization 3000:"Market Power and/or Efficiency?" 2742:Review of Industrial Organization 2304: 252:International Competition Network 3388:Library of Economics and Liberty 3372:Shughart II, William F. (2008). 2944:10.1111/j.1468-0297.2007.02126.x 2635:"EUR-Lex - 52004XC0205(02) - EN" 1856:(e) The Gini coefficient (1912) 1586:determine the relevant value of 1119:(a) The U Index (Davies, 1980): 3313: 3291: 3191: 3120:Industrial and Corporate Change 3030: 2991: 2966: 2919: 2877: 2830: 2791: 2776: 2714:Radio Free Europe/Radio Liberty 2701: 2676: 2651: 2627: 2580: 2562: 2538: 2491: 2482: 2457: 2442: 2417: 2393: 889: 844:0 - 2000 (Depending on Region) 495:After determining the relevant 4210:Historical school of economics 3386:(2nd ed.). Indianapolis: 2787:. (Working Paper No. 1874-87). 2360: 2280: 2248: 2207: 2183: 2159: 2135: 1978: 1963: 1927: 1912: 1710: 1691: 1343: 1331: 1164:{\displaystyle U=I^{*a}N^{-1}} 860:Since the introduction of the 547:The Herfindahl–Hirschman Index 257:List of competition regulators 13: 1: 3309:. (FIW Working Paper No. 62). 3064:Sonenshine, Ralph M. (2010). 2101: 1285:{\displaystyle I^{*}=1+c^{2}} 1053: 1030: 862:Sherman Antitrust Act of 1890 392:, as opposed to a market. In 4154:Theory of two-level planning 3649:New institutional economists 3359:Barriers to New Competition. 2843:Journal of Law and Economics 2736:Rosenbaum, David I. (1994). 2708:Baker, Mark (9 April 2008). 2570:"HERFINDAHL-HIRSCHMAN INDEX" 2465:"Herfindahl-Hirschman Index" 2061:Horizontal Merger Guidelines 1776:its accuracy and usefulness. 1096:and antitrust laws like the 982: 952:'s attempted acquisition of 665:Horizontal Merger Guidelines 7: 3634:Edward Lawrence Wheelwright 3287:. (Working Papers No. 345). 3276:du Pisanie, Johann (2013). 2034: 1306:(b) The Linda index (1976) 912:is unlikely to contest any 468:(high start-up costs, high 369:they are observing, from a 10: 4272: 4129:Penalty of taking the lead 3374:"Industrial Concentration" 3338:10.1007/s40812-023-00291-z 2884:Salinger, Michael (1990). 2449:Evans, Anthony J. (2014). 926:, was abandoned after the 679:Herfindahl-Hirschman Index 542:Herfindahl–Hirschman Index 490: 476:), industry size and age, 124:Anti-competitive practices 90:Herfindahl–Hirschman index 59:History of competition law 4172: 4036: 3953: 3720: 3647: 3476: 3082:10.1007/s11151-010-9262-8 2605:10.1007/s10842-007-0026-6 2516:10.1007/s10842-007-0026-6 1021:supra-competitive profits 415:various distributions of 330:The market concentration 4246:Concentration indicators 4225:Post-Keynesian economics 4205:French historical school 3477:Institutional economists 3421:Concentration and price. 2998:Martin, Stephen (1988). 2837:Demsetz, Harold (1973). 2429:US Department of Justice 2086:Probability distribution 1300:Media:Dirac_Distribution 882:where after determining 660:Federal Trade Commission 520:probability distribution 325:monopolistic competition 4200:Evolutionary psychology 4064:Conspicuous consumption 3470:Institutional economics 3204:mpra.ub.uni-muenchen.de 2550:Encyclopædia Britannica 2260:Harvard Business Review 478:product differentiation 394:industrial organization 4195:Evolutionary economics 4037:Key concepts and ideas 3993:Donald Angus MacKenzie 3619:George W. Stocking Sr. 3539:John Kenneth Galbraith 3366:Jour. of Indust. Econ. 3298:Palan, Nicole (2010). 3163:Oxford Economic Papers 2232:10.1287/orsc.1090.0486 1991: 1940: 1898: 1834: 1769: 1717: 1675: 1610: 1609:{\displaystyle CR_{i}} 1579: 1559: 1558:{\displaystyle CR_{i}} 1529: 1503: 1474: 1375: 1286: 1240: 1212: 1192: 1165: 1106:industrial competition 914:horizontal integration 903:horizontal integration 788: 680: 641: 612: 592: 524:frequency distribution 344:market competitiveness 169:Occupational licensing 45: 18:Industry concentration 4185:Development economics 4094:Hiding hand principle 4084:Effective competition 3955:Economic sociologists 3722:Behavioral economists 3584:Wesley Clair Mitchell 3419:Weiss, L. W. (1989). 2314:Bain, Joe, S (1951). 2096:Relative market share 2046:Dominance (economics) 1992: 1941: 1878: 1844:indicates the firm's 1835: 1770: 1718: 1655: 1611: 1580: 1560: 1530: 1504: 1475: 1349: 1287: 1241: 1239:{\displaystyle I^{*}} 1213: 1193: 1191:{\displaystyle I^{*}} 1166: 789: 678: 656:Department of Justice 642: 640:{\displaystyle s_{i}} 613: 572: 311:and their respective 44: 4256:Monopoly (economics) 4114:Market concentration 4079:Countervailing power 3885:Sendhil Mullainathan 3712:Oliver E. Williamson 3544:Walton Hale Hamilton 3489:Clarence Edwin Ayres 2932:The Economic Journal 2401:"Market participant" 2220:Organization Science 2091:Stochastic dominance 2071:Inequality of wealth 1957: 1863: 1787: 1733: 1627: 1590: 1569: 1539: 1513: 1493: 1313: 1250: 1223: 1202: 1175: 1126: 1078:creative destruction 962:Motivation for firms 711: 624: 563: 532:stochastic dominance 518:distributions (e.g. 452: Vodafone (27%) 301:market concentration 212:Occupational closure 207:Dividing territories 195:Essential facilities 95:Market concentration 4164:Veblenian dichotomy 4074:Conventional wisdom 4069:Conspicuous leisure 4059:Bounded rationality 4049:Administered prices 3870:Brigitte C. Madrian 3672:Steven N. S. Cheung 3554:Albert O. Hirschman 3549:Orris C. Herfindahl 3412:Tirole, J. (1988). 3175:10.1093/oep/gpaa044 3133:10.1093/icc/dtab049 2041:Concentration ratio 2008:degree distribution 2002:(f) Utilizing the 1764: 1690: 1528:{\displaystyle N-i} 1112:Alternative metrics 910:European Commission 801: 695:concentration ratio 689:Concentration ratio 607: 551:market participants 440: Telstra (37%) 371:perfect competitive 4180:Cultural economics 4044:Accelerator effect 3860:George Loewenstein 3800:Catherine C. Eckel 3519:John Maurice Clark 3484:Werner Abelshauser 3378:David R. Henderson 2754:10.1007/BF01029512 2342:– via JSTOR. 2288:"Market structure" 2123:The Economic Times 2015:within the system. 1987: 1936: 1830: 1765: 1750: 1713: 1676: 1606: 1575: 1555: 1525: 1499: 1470: 1282: 1236: 1208: 1188: 1161: 977:lack of efficiency 799: 784: 681: 637: 608: 593: 470:economies of scale 385:market structure. 231:Regulatory capture 46: 4233: 4232: 4054:Barriers to entry 3920:Robert J. Shiller 3880:Matteo Motterlini 3624:Lars Pålsson Syll 3357:Bain, J. (1956). 2167:"Competition law" 1985: 1934: 1828: 1742: 1578:{\displaystyle i} 1502:{\displaystyle i} 1464: 1406: 1347: 1211:{\displaystyle a} 1010:Cournot oligopoly 943:oilfield services 848: 847: 654:Section 1 of the 528:size distribution 466:barriers to entry 446: Optus (30%) 363:barriers to entry 307:of the number of 293: 292: 222:Misuse of patents 217:Predatory pricing 202:Exclusive dealing 85:Barriers to entry 73:Coercive monopoly 16:(Redirected from 4263: 4251:Market structure 4139:Shortage economy 4124:Market structure 4089:Herfindahl index 4013:Laurent Thévenot 4008:Richard Swedberg 4003:Lynette Spillman 3988:Mark Granovetter 3973:James S. Coleman 3945:Georg Weizsäcker 3940:Robert W. Vishny 3905:Klaus M. Schmidt 3855:Jeffrey R. Kling 3750:Douglas Bernheim 3639:Erich Zimmermann 3629:Thorstein Veblen 3609:Herbert A. Simon 3604:François Simiand 3579:Jesse W. Markham 3559:Geoffrey Hodgson 3499:Shimshon Bichler 3463: 3456: 3449: 3440: 3439: 3409: 3350: 3349: 3317: 3311: 3310: 3304: 3295: 3289: 3288: 3282: 3273: 3264: 3263: 3257: 3249: 3247: 3223: 3214: 3213: 3211: 3210: 3195: 3189: 3188: 3186: 3154: 3148: 3147: 3145: 3135: 3111: 3102: 3101: 3061: 3052: 3051: 3050: 3049: 3034: 3028: 3027: 2995: 2989: 2988: 2986: 2985: 2970: 2964: 2963: 2938:(527): 387–400. 2923: 2917: 2916: 2890: 2881: 2875: 2874: 2834: 2828: 2827: 2795: 2789: 2788: 2780: 2774: 2773: 2733: 2724: 2723: 2721: 2720: 2705: 2699: 2698: 2696: 2695: 2680: 2674: 2673: 2671: 2670: 2655: 2649: 2648: 2646: 2645: 2631: 2625: 2624: 2584: 2578: 2577: 2566: 2560: 2559: 2557: 2556: 2542: 2536: 2535: 2495: 2489: 2486: 2480: 2479: 2477: 2476: 2461: 2455: 2454: 2446: 2440: 2439: 2437: 2436: 2421: 2415: 2414: 2413: 2412: 2397: 2391: 2390: 2384: 2376: 2364: 2358: 2357: 2351: 2343: 2311: 2302: 2301: 2300: 2299: 2284: 2278: 2277: 2275: 2274: 2252: 2246: 2245: 2243: 2211: 2205: 2204: 2203: 2202: 2187: 2181: 2180: 2179: 2178: 2163: 2157: 2156: 2155: 2154: 2139: 2133: 2132: 2130: 2129: 2115: 2056:Herfindahl index 2051:Gini coefficient 1996: 1994: 1993: 1988: 1986: 1981: 1961: 1945: 1943: 1942: 1937: 1935: 1930: 1910: 1908: 1907: 1897: 1892: 1839: 1837: 1836: 1831: 1829: 1827: 1820: 1819: 1797: 1774: 1772: 1771: 1766: 1763: 1758: 1743: 1740: 1722: 1720: 1719: 1714: 1709: 1708: 1689: 1684: 1674: 1669: 1651: 1650: 1615: 1613: 1612: 1607: 1605: 1604: 1584: 1582: 1581: 1576: 1564: 1562: 1561: 1556: 1554: 1553: 1534: 1532: 1531: 1526: 1508: 1506: 1505: 1500: 1479: 1477: 1476: 1471: 1469: 1465: 1463: 1462: 1461: 1446: 1445: 1432: 1431: 1430: 1417: 1411: 1407: 1402: 1391: 1385: 1384: 1374: 1363: 1348: 1346: 1323: 1291: 1289: 1288: 1283: 1281: 1280: 1262: 1261: 1245: 1243: 1242: 1237: 1235: 1234: 1217: 1215: 1214: 1209: 1197: 1195: 1194: 1189: 1187: 1186: 1170: 1168: 1167: 1162: 1160: 1159: 1147: 1146: 1040:Industry effects 1003:in the sense of 997:consumer welfare 950:General Electric 874:consumer welfare 870:competition laws 856:Historical usage 851:Regulatory usage 802: 798: 793: 791: 790: 785: 783: 782: 752: 751: 739: 738: 726: 725: 670:Herfindahl index 646: 644: 643: 638: 636: 635: 617: 615: 614: 609: 606: 601: 591: 586: 536:Gini coefficient 458: Other (6%) 457: 451: 445: 439: 367:market structure 285: 278: 271: 176:Product bundling 78:Natural monopoly 30: 29: 21: 4271: 4270: 4266: 4265: 4264: 4262: 4261: 4260: 4236: 4235: 4234: 4229: 4168: 4149:Technostructure 4104:Instrumentalism 4099:Hirschman cycle 4032: 4028:Viviana Zelizer 3998:Joel M. Podolny 3949: 3875:Gary McClelland 3840:Daniel Kahneman 3835:David Ryan Just 3830:Charles A. Holt 3810:Urs Fischbacher 3795:Stephen Duneier 3785:Werner De Bondt 3716: 3643: 3594:Jonathan Nitzan 3534:Robert H. Frank 3524:John R. Commons 3504:Robert A. Brady 3472: 3467: 3430: 3398: 3354: 3353: 3318: 3314: 3302: 3296: 3292: 3280: 3274: 3267: 3251: 3250: 3224: 3217: 3208: 3206: 3196: 3192: 3155: 3151: 3112: 3105: 3062: 3055: 3047: 3045: 3036: 3035: 3031: 3016:10.2307/1928318 2996: 2992: 2983: 2981: 2972: 2971: 2967: 2924: 2920: 2905:10.2307/2534784 2888: 2882: 2878: 2835: 2831: 2816:10.2307/1926562 2796: 2792: 2781: 2777: 2734: 2727: 2718: 2716: 2706: 2702: 2693: 2691: 2688:www.justice.gov 2682: 2681: 2677: 2668: 2666: 2656: 2652: 2643: 2641: 2633: 2632: 2628: 2585: 2581: 2576:. 25 June 2015. 2568: 2567: 2563: 2554: 2552: 2544: 2543: 2539: 2496: 2492: 2487: 2483: 2474: 2472: 2469:www.justice.gov 2463: 2462: 2458: 2447: 2443: 2434: 2432: 2423: 2422: 2418: 2410: 2408: 2399: 2398: 2394: 2378: 2377: 2373:Honors Projects 2365: 2361: 2345: 2344: 2332:10.2307/1882217 2312: 2305: 2297: 2295: 2286: 2285: 2281: 2272: 2270: 2254: 2253: 2249: 2212: 2208: 2200: 2198: 2189: 2188: 2184: 2176: 2174: 2165: 2164: 2160: 2152: 2150: 2141: 2140: 2136: 2127: 2125: 2117: 2116: 2109: 2104: 2037: 1962: 1960: 1958: 1955: 1954: 1911: 1909: 1903: 1899: 1893: 1882: 1864: 1861: 1860: 1815: 1811: 1801: 1796: 1788: 1785: 1784: 1759: 1754: 1739: 1734: 1731: 1730: 1728: 1704: 1700: 1685: 1680: 1670: 1659: 1646: 1642: 1628: 1625: 1624: 1600: 1596: 1591: 1588: 1587: 1570: 1567: 1566: 1549: 1545: 1540: 1537: 1536: 1514: 1511: 1510: 1494: 1491: 1490: 1487: 1457: 1453: 1441: 1437: 1433: 1426: 1422: 1418: 1416: 1412: 1392: 1390: 1386: 1380: 1376: 1364: 1353: 1327: 1322: 1314: 1311: 1310: 1276: 1272: 1257: 1253: 1251: 1248: 1247: 1230: 1226: 1224: 1221: 1220: 1203: 1200: 1199: 1182: 1178: 1176: 1173: 1172: 1152: 1148: 1139: 1135: 1127: 1124: 1123: 1114: 1094:Competition Act 1056: 1050:concentration. 1042: 1033: 985: 964: 892: 858: 853: 805:Type of Market 778: 774: 747: 743: 734: 730: 721: 717: 712: 709: 708: 691: 631: 627: 625: 622: 621: 602: 597: 587: 576: 564: 561: 560: 544: 493: 462: 461: 460: 459: 455: 453: 449: 447: 443: 441: 437: 429: 289: 185:Refusal to deal 164:Tacit collusion 110:Relevant market 34:Competition law 28: 23: 22: 15: 12: 11: 5: 4269: 4259: 4258: 4253: 4248: 4231: 4230: 4228: 4227: 4222: 4220:Microeconomics 4217: 4212: 4207: 4202: 4197: 4192: 4187: 4182: 4176: 4174: 4173:Related fields 4170: 4169: 4167: 4166: 4161: 4156: 4151: 4146: 4141: 4136: 4131: 4126: 4121: 4116: 4111: 4109:Kuznets cycles 4106: 4101: 4096: 4091: 4086: 4081: 4076: 4071: 4066: 4061: 4056: 4051: 4046: 4040: 4038: 4034: 4033: 4031: 4030: 4025: 4023:Harrison White 4020: 4018:Carlo Trigilia 4015: 4010: 4005: 4000: 3995: 3990: 3985: 3980: 3975: 3970: 3965: 3959: 3957: 3951: 3950: 3948: 3947: 3942: 3937: 3932: 3930:Richard Thaler 3927: 3922: 3917: 3912: 3907: 3902: 3900:Howard Rachlin 3897: 3892: 3890:Michael Norton 3887: 3882: 3877: 3872: 3867: 3862: 3857: 3852: 3847: 3842: 3837: 3832: 3827: 3822: 3817: 3815:Herbert Gintis 3812: 3807: 3802: 3797: 3792: 3787: 3782: 3777: 3772: 3770:David Cesarini 3767: 3762: 3757: 3752: 3747: 3742: 3737: 3732: 3730:George Ainslie 3726: 3724: 3718: 3717: 3715: 3714: 3709: 3704: 3699: 3697:Douglass North 3694: 3689: 3684: 3682:Harold Demsetz 3679: 3674: 3669: 3664: 3662:Armen Alchian 3659: 3657:Daron Acemoglu 3653: 3651: 3645: 3644: 3642: 3641: 3636: 3631: 3626: 3621: 3616: 3614:Frank Stilwell 3611: 3606: 3601: 3599:Warren Samuels 3596: 3591: 3586: 3581: 3576: 3571: 3566: 3561: 3556: 3551: 3546: 3541: 3536: 3531: 3529:Richard T. Ely 3526: 3521: 3516: 3511: 3509:Daniel Bromley 3506: 3501: 3496: 3491: 3486: 3480: 3478: 3474: 3473: 3466: 3465: 3458: 3451: 3443: 3437: 3436: 3429: 3428:External links 3426: 3425: 3424: 3417: 3410: 3397:978-0865976658 3396: 3369: 3362: 3352: 3351: 3332:(2): 431–480. 3312: 3290: 3265: 3238:(3): 191–198. 3215: 3190: 3169:(1): 297–311. 3149: 3103: 3076:(2): 119–140. 3053: 3029: 3010:(2): 331–335. 2990: 2965: 2918: 2876: 2855:10.1086/466752 2829: 2810:(3): 271–286. 2790: 2775: 2748:(4): 379–392. 2725: 2700: 2675: 2650: 2626: 2579: 2561: 2537: 2490: 2481: 2456: 2441: 2431:. 25 June 2015 2416: 2392: 2359: 2326:(3): 293–324. 2303: 2279: 2262:. 2016-06-21. 2247: 2206: 2182: 2158: 2134: 2106: 2105: 2103: 2100: 2099: 2098: 2093: 2088: 2083: 2078: 2076:Market failure 2073: 2068: 2063: 2058: 2053: 2048: 2043: 2036: 2033: 2032: 2031: 2027: 2026: 2022: 2021: 2017: 2016: 2000: 1999: 1984: 1980: 1977: 1974: 1971: 1968: 1965: 1946: 1933: 1929: 1926: 1923: 1920: 1917: 1914: 1906: 1902: 1896: 1891: 1888: 1885: 1881: 1877: 1874: 1871: 1868: 1854: 1853: 1849: 1826: 1823: 1818: 1814: 1810: 1807: 1804: 1800: 1795: 1792: 1778: 1777: 1762: 1757: 1753: 1749: 1746: 1738: 1726: 1723: 1712: 1707: 1703: 1699: 1696: 1693: 1688: 1683: 1679: 1673: 1668: 1665: 1662: 1658: 1654: 1649: 1645: 1641: 1638: 1635: 1632: 1618: 1617: 1603: 1599: 1595: 1574: 1552: 1548: 1544: 1524: 1521: 1518: 1498: 1485: 1480: 1468: 1460: 1456: 1452: 1449: 1444: 1440: 1436: 1429: 1425: 1421: 1415: 1410: 1405: 1401: 1398: 1395: 1389: 1383: 1379: 1373: 1370: 1367: 1362: 1359: 1356: 1352: 1345: 1342: 1339: 1336: 1333: 1330: 1326: 1321: 1318: 1304: 1303: 1296: 1293: 1279: 1275: 1271: 1268: 1265: 1260: 1256: 1233: 1229: 1207: 1185: 1181: 1158: 1155: 1151: 1145: 1142: 1138: 1134: 1131: 1113: 1110: 1055: 1052: 1041: 1038: 1032: 1029: 989:game theoretic 984: 981: 963: 960: 959: 958: 947: 932: 891: 888: 857: 854: 852: 849: 846: 845: 842: 839: 835: 834: 831: 828: 824: 823: 820: 817: 813: 812: 809: 806: 781: 777: 773: 770: 767: 764: 761: 758: 755: 750: 746: 742: 737: 733: 729: 724: 720: 716: 690: 687: 634: 630: 605: 600: 596: 590: 585: 582: 579: 575: 571: 568: 543: 540: 492: 489: 484:requirements. 454: 448: 442: 436: 432: 431: 430: 428: 425: 402:rate of profit 291: 290: 288: 287: 280: 273: 265: 262: 261: 260: 259: 254: 246: 245: 241: 240: 239: 238: 233: 228: 219: 214: 209: 204: 199: 198: 197: 192: 182: 173: 172: 171: 166: 161: 156: 146: 135: 133:Monopolization 127: 126: 120: 119: 118: 117: 115:Merger control 112: 107: 102: 97: 92: 87: 82: 81: 80: 75: 61: 53: 52: 51:Basic concepts 48: 47: 37: 36: 26: 9: 6: 4: 3: 2: 4268: 4257: 4254: 4252: 4249: 4247: 4244: 4243: 4241: 4226: 4223: 4221: 4218: 4216: 4215:Legal realism 4213: 4211: 4208: 4206: 4203: 4201: 4198: 4196: 4193: 4191: 4188: 4186: 4183: 4181: 4178: 4177: 4175: 4171: 4165: 4162: 4160: 4157: 4155: 4152: 4150: 4147: 4145: 4142: 4140: 4137: 4135: 4132: 4130: 4127: 4125: 4122: 4120: 4117: 4115: 4112: 4110: 4107: 4105: 4102: 4100: 4097: 4095: 4092: 4090: 4087: 4085: 4082: 4080: 4077: 4075: 4072: 4070: 4067: 4065: 4062: 4060: 4057: 4055: 4052: 4050: 4047: 4045: 4042: 4041: 4039: 4035: 4029: 4026: 4024: 4021: 4019: 4016: 4014: 4011: 4009: 4006: 4004: 4001: 3999: 3996: 3994: 3991: 3989: 3986: 3984: 3983:Paula England 3981: 3979: 3978:Paul DiMaggio 3976: 3974: 3971: 3969: 3968:Fred L. Block 3966: 3964: 3961: 3960: 3958: 3956: 3952: 3946: 3943: 3941: 3938: 3936: 3933: 3931: 3928: 3926: 3923: 3921: 3918: 3916: 3915:Hersh Shefrin 3913: 3911: 3908: 3906: 3903: 3901: 3898: 3896: 3895:Matthew Rabin 3893: 3891: 3888: 3886: 3883: 3881: 3878: 3876: 3873: 3871: 3868: 3866: 3865:Graham Loomes 3863: 3861: 3858: 3856: 3853: 3851: 3850:George Katona 3848: 3846: 3843: 3841: 3838: 3836: 3833: 3831: 3828: 3826: 3825:David Halpern 3823: 3821: 3818: 3816: 3813: 3811: 3808: 3806: 3803: 3801: 3798: 3796: 3793: 3791: 3788: 3786: 3783: 3781: 3780:Rachel Croson 3778: 3776: 3773: 3771: 3768: 3766: 3765:Colin Camerer 3763: 3761: 3760:Sarah Brosnan 3758: 3756: 3755:Samuel Bowles 3753: 3751: 3748: 3746: 3743: 3741: 3738: 3736: 3733: 3731: 3728: 3727: 3725: 3723: 3719: 3713: 3710: 3708: 3707:Elinor Ostrom 3705: 3703: 3700: 3698: 3695: 3693: 3692:Claude Ménard 3690: 3688: 3685: 3683: 3680: 3678: 3675: 3673: 3670: 3668: 3667:Masahiko Aoki 3665: 3663: 3660: 3658: 3655: 3654: 3652: 3650: 3646: 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3060: 3058: 3043: 3039: 3038:"Competition" 3033: 3025: 3021: 3017: 3013: 3009: 3005: 3001: 2994: 2980:. 21 May 2019 2979: 2975: 2969: 2961: 2957: 2953: 2949: 2945: 2941: 2937: 2933: 2929: 2922: 2914: 2910: 2906: 2902: 2898: 2894: 2887: 2880: 2872: 2868: 2864: 2860: 2856: 2852: 2848: 2844: 2840: 2833: 2825: 2821: 2817: 2813: 2809: 2805: 2801: 2794: 2786: 2779: 2771: 2767: 2763: 2759: 2755: 2751: 2747: 2743: 2739: 2732: 2730: 2715: 2711: 2704: 2689: 2685: 2679: 2665: 2661: 2654: 2640: 2636: 2630: 2622: 2618: 2614: 2610: 2606: 2602: 2598: 2594: 2590: 2583: 2575: 2571: 2565: 2551: 2547: 2541: 2533: 2529: 2525: 2521: 2517: 2513: 2509: 2505: 2501: 2494: 2485: 2470: 2466: 2460: 2452: 2445: 2430: 2426: 2420: 2406: 2402: 2396: 2388: 2382: 2374: 2370: 2363: 2355: 2349: 2341: 2337: 2333: 2329: 2325: 2321: 2317: 2310: 2308: 2293: 2289: 2283: 2269: 2265: 2261: 2257: 2251: 2242: 2237: 2233: 2229: 2225: 2221: 2217: 2210: 2196: 2192: 2186: 2172: 2168: 2162: 2148: 2144: 2138: 2124: 2120: 2114: 2112: 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Index

Industry concentration
Competition law

History of competition law
Monopoly
oligopoly
Coercive monopoly
Natural monopoly
Barriers to entry
Herfindahl–Hirschman index
Market concentration
Market power
SSNIP test
Relevant market
Merger control
Anti-competitive practices
Monopolization
Collusion
cartels
Price fixing
cases
Bid rigging
Tacit collusion
Occupational licensing
Product bundling
tying
Refusal to deal
Group boycott
Essential facilities
Exclusive dealing

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