Phillips curves are central to discussions of inflation dynamics and monetary policy. New Keynesian Phillips curves describe how past inflation, expected future inflation, and a measure of real marginal cost or an output gap drive the current inflation rate. This paper studies the (potential)...

Countries that specialize in commodity exports often exhibit a correlation between the relevant commodity price and the value of their currency. We explore a natural but little-studied explanation for this correlation. An increase in the commodity price leads to increases in the future values of...

A well-known feature of one-good, multi-agent, Arrow-Debreu economies with identical additively-separable, homothetic preferences is that the consumptions of all agents are perfectly correlated. Such economies are widely used in interpreting business cycles but seem to be inconsistent with...

This chapter reviews calibration techniques in macroeconomics. The discussion designs with an outline of the use of calibration in applied work. Next, a simple asset-pricing model is the setting for a demonstration of calibration and for comparison with conventional estimation and testing....

International risk-sharing which diversifies away income risk will reduced saving, with constant relative risk aversion. It growth arises from the external effects of human capital accumulation then reducing saving will reduced growth. Welfare also may fall with risk-sharing, because endogenous...

Business cycles may be defined or measured by parametrizing detrending filters to maximize the ability of a business-cycle model to match the moments of the remaining cycles. Thus a theory can be used to guide cycle measurement. We present two applications to U.S. postwar data. In the first...

We study the classic transfer problem of predicting the effects of an international transfer on the terms of trade and the current account. A two-country model with debt and capital allows for realistic features of historical transfers: they follow wartime increases in government spending and...

Phillips curves are central to discussions of inflation dynamics and monetary policy. New Keynesian Phillips curves describe how past inflation, expected future inflation, and a measure of real marginal cost or an output gap drive the current inflation rate. This paper studies the (potential)...

What explains the widespread fear of deflation? This paper reviews the history of thought, economic history, and empirical evidence on deflation, with a view to answering this question. It also outlines informally the main effects of deflation in applied monetary models. The main finding is that...