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On the Choice of Welfare Standards in Competition Law, in Goals of Competition Law (Zimmer, ed., Edward Elgar, forthcoming 2012). [Olin Center WP]

Market Definition and the Merger Guidelines, Review of Industrial Organization, vol. 39, 107-125 (2011). [Olin Center WP]

On the Meaning of Horizontal Agreements in Competition Law, California Law Review, vol. 99, 683-818 (2011). [WWW]

Market Share Thresholds: On the Conflation of Empirical Assessments and Legal Policy Judgments, Journal of Competition Law & Economics, vol. 7, 243–276 (2011). [Olin Center WP]

An Economic Approach to Price Fixing, Antitrust Law Journal, vol. 77, 343-449 (2011). [Antitrust Law Journal]

Why (Ever) Define Markets?, Harvard Law Review, vol. 124, 437-517 (2010). [Harvard Law Review]

Antitrust, in Handbook of Law and Economics (Polinsky & Shavell, eds.; Elsevier, 2007), vol 2, pp. 1072-1225. (With Carl Shapiro) [NBER] [Olin Center WP]

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Concentration in the Israeli Economy and Bank Investment in Nonfinancial Companies (with Lucian Bebchuk and Jesse Fried), The Economic Quarterly, vol. 42, 643-70 (1996) (in Hebrew). John M. Olin Center for Law, Economics, and Business (Harvard Law School) Discussion Paper No. 209 (January 1997) (in English).

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The Patent-Antitrust Intersection: A Reappraisal, Harvard Law Review, vol. 97, 1813-1892 (1984).

The Accuracy of Traditional Market Power Analysis and A Direct Adjustment Alternative, Harvard Law Review, vol. 95, 1817-1848 (1982).