A transactions model of the demand for multiple media of exchange is developed. Some results are expected, and others are both new and surprising. There are both extensive and intensive margins to currency substitution, and inflation may affect the two margins differently, leading to subtle...

This paper tests the prediction of the Permanent Income Hypothesis (PIH) that news about future income induce a revision in consumption equal to the revision in permanent income. We use time-series data from 48 contiguous US states to perform the test. The empirical results provide some support...

This paper investigates whether time-series data from 11 West-German states (Länder) provide evidence in accord with the implication of the permanent-income hypothesis (PIH) for the stochastic relationship between consumption and income innovations. The empirical results do not support this...

We study the world trading equilibrium in a Ricardian model where factors of production are themselves produced and tradable rather than endowed and non-tradable, corresponding to the three-quarters of international trade that is in intermediate and capital goods. We show that trade affects...

We introduce a new time series measure of the extent of federal regulation in the U.S. and use it to investigate the relationship between federal regulation and macroeconomic performance. We find that regulation has statistically and economically significant effects on aggregate output and the...

We study the interaction of endogenous growth and Ricardian trade working solely through comparative advantage. The model is built to be consistent with several facts about technical progress, R&D activity, industrial organization, and trade. We obtain a full characterization of the transition...

Endogenous growth requires that non-reproducible factors of production be either augmented or eliminated. Attention heretofore has focused almost exclusively on augmentation. In contrast, we study factor elimination. Maximizing agents decide when to reduce the importance of non-reproducible...

The most overworked figure in our society may be the unemployment rate. Newscasters, politicians, and economists use it in discussing everything from the overall health of the economy to the merits of alternative welfare programs. Despite its widespread use, however, the unemployment rate...