The literature on optimal income taxation has operated on the assumption that wage rates are generated exogenously by innate ability and therefore do not respond to behavior and taxation. This is in stark contrast to a large empirical literature documenting a strong effect of work effort on...

During the period 1996-2000, the coverage of VAT in Pakistan rose by twenty times in terms of the number of firms in the tax net and by ten times in terms of the volume of transactions subject to it. This paper leverages this staggered introduction of VAT in the country to estimate its...