We apply the method of constrained asset share estimation (CASE) to test the mean-variance efficiency (MVE) of the stock market. This method allows conditional expected returns to vary in relatively unrestricted ways. The data estimate reasonably the price of risk, and, in some cases, the MVE...

This paper, written for the NBER Conference on the Changing Role of the United States in the World Economy, covers the capital account in the U.S. balance of payments. It first traces the history from 1946 to 1980, a period throughout which Americans were steadily building up a positive net...

It is striking how often countries with oil or other natural resource wealth have failed to grow more rapidly than those without. This is the phenomenon known as the Natural Resource Curse. The principle has been borne out in some econometric tests of the determinants of economic performance...