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Working Paper
Exchange rates in the long run
If Purchasing Power Parity holds in the long run, then real exchange rates are mean stationary. To test this hypothesis, monthly data on bilateral real exchange rates between the United States and five countries extending back to the 1920s are calculated. The null hypothesis of mean stationarity is tested against a variety of nonstationary alternatives. Our results strongly favor mean stationarity over models that permit long-run trends in real exchange rates. The data also favor stationarity over a unit root process with no drift. We show that the realized path of the real exchange rate lies ...
Discussion Paper
Time inconsistent preferences and Social Security
In this paper we examine the role of social security in an economy populated by overlapping generations of individuals with time-inconsistent preferences who face mortality risk, individual income risk, and borrowing constraints. Agents in this economy are heterogeneous with respect to age, employment status, retirement status, hours worked, and asset holdings. We consider two cases of time-inconsistent preferences. First, we model agents as quasi-hyperbolic discounters. They can be sophisticated and play a symmetric Nash game against their future selves; or they can be naive and believe that ...
Working Paper
IRAs and saving: evidence from a panel of taxpayers
Working Paper
How bad is the federal budget deficit?
Working Paper
An experimental study of comparable worth
Conference Paper
An income expenditure version of the wedge model
Working Paper
Saving and interest rates in Japan: why they have fallen and why they will remain low
This paper quantifies the role of alternative shocks in accounting for the recent declines in Japanese saving rates and interest rates and provides some projections about their future course. We consider three distinct sources of variation in saving rates and real interest rates: changes in fertility rates, changes in survival rates, and changes in technology. The empirical relevance of these factors is explored using a computable dynamic OLG model. We find that the combined effects of demographics and slower total factor productivity growth successfully explain both the levels and the ...
Working Paper
Real and nominal exchange rates since 1919
Working Paper
Money supply announcements and real economic activity