We study the properties associated to various definitions of ambiguity ([8], [9], [18] and [23]) in the context of Maximin Expected Utility (MEU). We show that each definition of unambiguous events produces certain restrictions on the set of priors, and completely characterize each definition in...

I show that virtually any model of decision making under uncertainty is associated to a certain structure. This contains three fundamental ingredients: (1) The domain of the acts; (2) Another set, which is called the set of models for the decision maker; and (3) The decision maker information...

I study connected manifolds in this paper. This include finite and infinite dimensional manifolds.

We determine the effects of a delayed or immediate tax cut with or without a "sunset" feature in a real customer-market, nonRicardian economy. Our model incorporates both the supply-sider channel as well as the Feldstein-Rubin-Summers channel. We show that a tax cut may depress both the real...

This paper formulates a conformity test for cointegration for a multivariate I(1) process obeying a VAR specification. The test statistic is a function of the characteristic roots of the sample covariance matrix of the cointegral vector; the latter is obtained from the unrestricted estimation of...