Optimality of the Friedman Rule in Overlapping Generations Model with Spatial Separation

Recent papers suggest that when intermediation is analyzed seriously, the Friedman rule does not maximize social welfare in overlapping generations model in which money is valued because of spatial separation and limited communication. These papers emphasize a trade-off between productive efficiency and risk sharing. We show financial intermediation or a trade-off between productive efficiency and risk sharing are neither necessary nor sufficient for that result. We give conditions under which the Friedman rule maximizes social welfare and show any feasible allocation such that money grows faster than the Friedman rule is Pareto dominated by a feasible allocation with the Friedman rule. The key to the results is the ability to make intergenerational transfers.monetary policy, Friedman rule, fiat money

The Effect of Monetary Policy on Economic Output

There is substantial research effort devoted to identifying a sufficient statistic for monetary policy. The purpose of this paper is to broaden the scope of the on-going investigation along three dimensions. First, we follow up the Rudebusch-Svensson claim of parameter instability in the output regressions by examining the statistical stability of the parameter estimates with post-1996 data. Second, we examine whether alternative measures of the cyclical component affect the correlation between money supply, interest rates and output. Third, we consider alternative measures of the money supply, permitting us to assess the distinct roles of inside and outside money in terms of the correlation between each component and output.Monetary Policy, Money Supply

A Role for Sunspots in Explaining Endogenous Fluctutations in Illegal Immigration

In this paper we provide an alternative explanation for why illegal immigration can exhibit substantial fluctuations despite a constant wage gap. We develop a model economy in which migrants make decisions in the face of uncertain border enforcement and lump-sum transfers from the host country. The uncertainty is extrinsic in nature, a sunspot, and arises as a result of ambiguity regarding the commodity price of money. Migrants are restricted from participating in state-contingent insurance markets in the host country, whereas host country natives are not. We establish the existence of sunspot equilibria that are not mere randomizations over certainty equilibria. Volatility in migration flows stems from two distinct sources: the tension between transfers inducing migration and enforcement discouraging it and secondly the existence of a sunspot. Finally, we examine the impact of a change in tax/transfer policies by the government on migration.Sunspots, Immigration, International Migration