The NBER supports research on the economic effects of tax policies in two ways. First, it maintains a sophisticated federal and state income tax calculator (TAXSIM) that can be used to estimate the total tax burdens as well as the marginal tax rates on households with various characteristics. Computing these tax rates makes it possible to carry out a wide range of empirical research on the links between taxes and household behavior. Second, each year the NBER convenes a research meeting, the Tax Policy and the Economy (TP&E) meeting, at which researchers present their latest findings on the behavioral impact of taxation or government transfer programs. TP&E, which has been generously supported by the Bradley Foundation for more than a decade, convenes leading scholars from the research community and key policy-makers from the Washington tax policy community. It is an important channel for making participants in the policy process aware of new research findings, and for helping academic researchers to identify emerging issues on the policy agenda.