For almost thirty years, Brookings Papers on Economic Activity (BPEA) has provided academic and business economists, government officials, and members of the financial and business communities with timely research of current economic issues. Contents Include: Articles WILLIAM D. NORDHAUS Lethal Model 2: The Limits to Growth Revisited CHRISTOPHER D. CARROLL The Buffer-Stock Theory of Saving: Some Macroeconomic Evidence Reports J. BRADFORD DE LONG and Lawrence H. SUMMERS Equipment Investment and Economic Growth: How Strong Is the Nexus? DAVID LIPTON an JEFFREY D. SACHS Prospects for Russia's Economic Reforms CASEY B. MULLIGAN and XAVIER SALA-I-MARTIN U.S. Money Demand: Surprising Cross-Sectional Estimates