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Author:Aiyagari, S. Rao 

Working Paper
Equilibrium existence in an overlapping generations model with altruistic preferences

We prove the existence of a competitive equilibrium in an overlapping generations model in which each generation has a preference ordering over its own and its descendents? consumptions. The model is one of pure exchange with many goods in each period and two period lived generations. The bequest from one generation to the next is required to be non-negative and is endogenous. In equilibrium, some sequences of agents of successive generations may be continually ?linked? by positive bequests and act as infinitely lived agents. Other sequences of agents may not be so linked and therefore behave ...
Working Papers , Paper 356

Working Paper
Existence of steady states with positive consumption in the Kiyotaki-Wright model

We prove the general existence of steady states with positive consumption in an N goods and fiat money version of the Kiyotaki-Wright (?On money as a median of exchange,? Journal of Political Economy 1989, 97 (4), 927?54) model by admitting mixed strategies. We also show that there always exists a steady state in which everyone accepts a least costly-to-store object. In particular, if fiat money is one such object, then there always exists a monetary steady state. We also establish some other properties of steady states and comment on the relationship between steady states and (incentive) ...
Working Papers , Paper 428

Comments on Farmer and Guo's \\"the econometrics of indeterminacy: an applied study.\\"

I argue that Farmer and Guo's one-sector real business cycle model with indeterminacy and sunspots fails empirically and that its failure is inherent in the logic of the model taken together with some simple labor market facts.
Staff Report , Paper 196

Working Paper
Uninsured idiosyncratic risk and aggregate saving

We find that precautionary saving accounts for only a modest (less than 3 percentage point) increase in the aggregate saving rate, at least for moderate and empirically plausible parameter values. This finding is based on a quantitative analysis of a reasonably parameterized version of the standard growth model modified to include a large number of agents who receive uninsured idiosyncratic labor endowment shocks. In contrast to representative agent models, asset trading is quite important to individuals. The model can also account qualitatively for the positive skewness of wealth and income ...
Working Papers , Paper 502

Journal Article
On the contribution of technology shocks to business cycles

This article contends that the various measures of the contribution of technology shocks to business cycles calculated using the real business cycle modeling method are not corroborated. The article focuses on a different and much simpler method for calculating the contribution of technology shocks, which takes account of facts concerning the productivity/labor input correlation and the variability of labor input relative to output. Under several standard assumptions, the method predicts that the contribution of technology shocks must be large (at least 78 percent), that the labor supply ...
Quarterly Review , Volume 18 , Issue Win , Pages 22-34

Journal Article
Deflating the case for zero inflation

This paper analyzes the U.S. congressional proposal to instruct the Federal Reserve to, in the next five years, lower inflation to zero from its current rate of around 5 percent. The paper concludes that, when other policy options are considered, the zero inflation policy is not advisable. Its benefits would be very small--possibly negative--while its costs would probably be significant. Other, more direct policy options could produce most of the same benefits with fewer costs. Among these alternative policies are deregulating interest rates on demand deposits, paying interest on financial ...
Quarterly Review , Volume 14 , Issue Sum , Pages 2-11

Working Paper
Nonmonetary steady states in stationary overlapping generations models with long lived agents and discounting: multiplicity, optimality, and consumption smoothing

We construct a sequence of pure exchange, stationary OLG economies in which generations have longer and longer life spans and all agents maximize a discounted sum of utilities with a fixed, positive, and common discount rate. Period utility functions and endowment patterns are subject to mild restrictions and within generation heterogeneity is permitted. We show that: (i) Every sequence of equilibrium interest rates converges to the discount rate. (ii) Eventually every nonmonetary steady state is optimal and a monetary steady state will never exist. (iii) For any agent consumption at any ...
Working Papers , Paper 325

Journal Article
Response to a defense of zero inflation

This essay distills the differences between zero inflation proponents and critics to three main questions: Can the central bank make a credible commitment to maintaining a stable price level? Should monetary policy be used to reduce the tax on capital income? And would reducing uncertainty about inflation produce significant social benefits? Proponents of zero inflation answer all three questions yes, while critics answer no. The essay reviews both answers for each question and suggests that the disagreements are at least partly due to inadequacies in economic models. The essay repeats the ...
Quarterly Review , Volume 15 , Issue Spr , Pages 21-24

Working Paper
Comments on Farmer and Guo's \"The econometrics of indeterminacy: an applied study.\"

(replaced by Staff Report No. 196)
Working Papers , Paper 543

Journal Article
Deficits, interest rates, and the tax distribution

Quarterly Review , Volume 9 , Issue Win


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