Taxation is a fundamental policy instrument in the hands of governments. Yet, it is often used inefficiently. Improving taxation requires reforms, but reforms are often blocked. This article reviews the literature to identify three crucial aspects of Personal Income Taxation (PIT). First, what...

Political constraints and incentives are the true driver of tax reforms. Thispaper reviews the political economics literature on personal income tax systems andreforms to see how political mechanisms help explain tax reforms. We take some ofthe implications of these theories to the data using...