Unpublished.

• "Business Groups and the Natural State," paper for the conference "The Future of Industry and Innovation in Asia: Firms, Networks and Alliances," July 8-9, 2010, Stanford University, and for the conference on “Institutions and National Competiveness,” August 9-11, 2010, Chung-Ang University, Seoul, South Korea. Under review at the Journal of Economic Behavior and Organization.
• "The Austrian Theory of the Firm: Retrospect and Prospect," paper for the conference “Austrian Market-based Approaches to the Theory and Operation of the Business Firm,” George Mason Law School, May 23-25, 2007, Arlington, Virginia. To appear in a special issue of the Review of Austrian Economics.

• “Organizing the Electronic Century.” Paper for the conference ”Has There Been a Third Industrial Revolution in Global Business?” November 16-18, 2006, Bocconi University, Milan. To appear in Louis Galambos, ed., The Third Industrial Revolution in Global Business. New York: Cambridge University Press, in preparation.

• "Stop Crying over Spilt Knowledge: A Critical Look at the Theory of Spillovers and Technical Change" (with Paul L. Robertson), paper presented at the MERIT conference on Innovation, Evolution and Technology, August 25-27, 1996, Maastricht, the Netherlands.

• "Bursting Boilers and the Federal Power Redux: How Effective Was Federal Regulation on the Western Rivers?" (with David J. Denault and Samson M. Kimenyi). Paper presented at the Economic History Seminar, Northwestern University, May 26, 1994.

• "Uncertainty and the Origin of Predictable Behavior: Heiner Reexamined" (with Thomas J. Miceli), Working Paper 91-1500, Department of Economics, University of Connecticut, 1991.

• "Entrepreneurship and Knowledge," Research Report 82-12, C. V. Starr Center for Applied Economics, New York University, June 1982.
• "Subjective Probability and Subjective Economics " Research Report 82-09, C. V. Starr Center for Applied Economics, New York University, March 1982.
• "Why Are There Firms?" Research Report 81-30, C. V. Starr Center for Applied Economics, New York University, March 1981.