grantor: University of TorontoThis thesis examines the formation and evolution of fiscal policy within models of positive political economy. The first two essays focus on tax policy while the third essay examines the optimal provision of public goods. The central theme is that observed government policy is the outcome of its self interested behavior based on its ideology and the desire to get reelected. The first essay presents a classical signaling model in which there are two types of incumbents whose preference on income distributions is private information. The incumbents use tax policy to signal their type. The separating and pooling equilibria are characterized. In the second essay, voters know are uncertain about two releva...