This paper extends the methodology first proposed by Ahmad and Stern for the design of tax reforms that are optimal at the margin. The extension centers on a sharper approximation of welfare measures. The original approach and its variant are illustrated in the case of the current Mexican tax...

Changes in quality in information technology products provoke that compilation of their price indexes represent a major challenge. In this respect, the aims of this study are three. First, to build price indexes for personal computers during 1990-2004. Second, to compare our price indexes with...