Michael R. Pakko

Reconsidering the Trade-Creating Effects of a Currency Union

This paper reconsiders recent empirical evidence found by Andrew Rose that countries adopting a common currency will triple their bilateral trade. The authors find that this large estimated effect is due to estimation bias arising from missing and/or misspecified time-variant factors rather than to the adoption of a common currency. The results of this study, obtained with a general specification of time-variant factors, indicate that a common currency actually leads to a small reduction in trade over a 5-year period, although this result is not statistically different from zero. The authors also find that over 10- and 20-year periods, trade volumes are more than halved by the adoption of a common currency.

The Monetary Instrument Matters

This paper revisits the debate over the money supply versus the interest rate as the instrument of monetary policy. Using a dynamic stochastic general equilibrium framework, the authors examine the effects of alternative monetary policy rules on inflation persistence, the information content of monetary data, and real variables. They show that inflation persistence and the variability of inflation relative to money growth depend on whether the central bank follows a money growth rule or an interest rate rule. With a money growth rule, inflation is not persistent and the price level is much more volatile than the money supply. Those counterfactual implications are eliminated by the use of interest rate rules whether prices are sticky or not. A central banks use of interest rate rules, however, obscures the information content of monetary aggregates and also leads to subtle problems for econometricians trying to estimate money demand functions or to identify shocks to the trend and cycle components of the money stock.

Changing Technology Trends, Transition Dynamics, and Growth Accounting

The technology growth trends that underlie recent productivity patterns are investigated in a framework that incorporates investment-specific technological progress. Structural-break tests and regime-shifting models reveal the presence of a downward shift in total factor productivity growth in the late 1960s and an upward shift in investment-specific technology growth in the mid-1980s. In both cases, these breaks precede the generally recognized dates of labor productivity growth shifts. Simulations of technology growth shocks in a basic neoclassical model show that induced patterns of capital accumulation are generally consistent with the observed lags between technological advances and changes in productivity growth.

Substitution Elasticities and Investment Dynamics in Two-Country Business Cycle Models

Two-country applications of equilibrium business cycle methodology have succeeded in matching some key features of international fluctuations. However, discrepancies between theory and data remain. This paper identifies an anomaly related to a basic property of typical models: The prediction of countercyclical net exports is fundamentally related to a counterfactual implication for negative cross-country investment correlations. The introduction of investment adjustment costs can induce positive investment comovement; however, this has the side-effect of reversing the cyclical behavior of net exports. The calibration of a low elasticity of substitution between domestic goods and imports is shown to be a more robust specification with regard to this and other puzzles that have arisen in the international business cycle literature.