Economic Growth and Information Technology in the U.S. and Japan, at Tokyo, Japan, Monday, June 25, 2007:
A Retrospective Look at the U.S. Productivity Growth Resurgence, at Annual AEA Meeting - Chicago, Saturday, January 6, 2007:
Corporate Income Taxes and Economic Growth, at Conference on the Corporate Income Tax and the Economy, Friday, June 2, 2006:
Information Technology and the World Economy Tuesday, June 7, 2005:
Information Technology and the U.S. Economic Growth, at New Orleans, Louisiana, Saturday, January 6, 2001:
Information Technology and the Productivity Expansion, at 2010 Sixth Biennial North American Productivity Workshop.