This is the first book completely dedicated to the measurement and definition of market power across a broad array of industries. It will provide economists and lawyers an insight into how anti-trust economists actually go about measuring market power in a given industry. A useful book for academics, policy makers and consulting experts. INDICE Assigning Market Shares for Antitrust Analysis (G.J. Werden). Introduction. The role of market shares in antitrust analysis. Common denominators for assigning market shares. Structural and equilibrium market shares. Asset-based market shares. Output-based market shares. Imports and exports. The problem of attribution. Conclusions. References. Mergers Among bidders with correlated Values (L. Froeb, S. Tschantz). Introduction. Families of mixing distributions. Mixtures of power-related distributions. Conclusion. References. Measuring the Effect of Cartelization in Medicine: An International Study (P. Zweifel, C. Nicolet). Introduction. Theoretical considerations. Indicators of power. Testing the hypotheses. Discussion and conclusion. References. Spatial Economics and Market Definition (F.M. Scherer). Introduction. Testimony. Market Power and Simultaneous Recoupment in the Maryland Medical Electronic Claim Submission Market (D.I. Rosenbaum, J.P. Lenich). Introduction. Blue Cross Blue Shield of Maryland and EDS. The Martello litigation. The legal standards. Relevant market. Barriers to entry. Market power. The predation scheme. Conclusion. Appendix. Measuring Market Power in the Steel Industry (E. Maasoumi et al.). Introduction. A framework for measuring market power. Geographic and product market definition. Assesing the degree of competition and market power. Conclusion. References. Measuring Market Power and Competition Policy in Hong Kong (P. Lin, E.K.Y. Chen). Introduction. The Consumer Council's studies of market power. Hong Kong's competition policy. Concluding remarks. References. Staples-Office Depot and UP-SP: An Antit