We develop a framework for nonparametrically identifying optimization frictions and structural elasticities using notches--discontinuities in the choice sets of agents--introduced by tax and transfer policies. Notches create excess bunching on the low-tax side and missing mass on the high-tax...

This paper analyzes the design of tax systems under imperfect enforcement. A common policy in developing countries is to impose minimum tax schemes whereby firms are taxed either on profits or on turnover, depending on which tax liability is larger. This production inefficient tax policy has...

This paper analyzes the effects of personal income taxation on earnings, formality and business organization choices of agents. I use a tax reform introduced in Pakistan in 2009, which increased taxation of partnership firms substantially relative to other unincorporated firms, as a natural...