The second welfare theorem and the core-equivalence theorem have been proved to be fundamental tools for obtaining equilibrium existence theorems, especially in an infinite dimensional setting. For well-behaved exchange economies that we call proper economies, this paper gives (minimal)...

Models of monetary economies with explicit micro-foundations play a central role in macroeconomics. A common assumption is the quasi-linearity of individuals' preferences. Moreover, anonymity rules out credit and implies that individuals are constrained in their ability to save and borrow. These...

This thesis includes three essays analyzing the role of government interventions in anchoring inflation in an extremely open small economy, Taiwan, whose monetary authority has been frequently using large-size interventions since the 1985 Plaza Agreement. Taiwan's relative success in controlling...

The purpose of this thesis, as implied by its title, is essentially two-fold. The first goal is to introduce and study the notion of properness, as well as some other concepts related to it. The importance of this property lies in the fact that in the infinite-dimensional case it effectively...