The paper simulates the effects of tax and social security reforms on the main variables of the Brazilian Economy in the long run. For that matter a computable general equilibrium model of overlapping generations à la Lucas (1988) is employed. The main results are that the reforms in themselves are not capable of affecting the performance of the interest rate and the long run growth rate of the economy. However, as long as they make it possible to reduce the public debt and to increase the investment in education, they become important for the improvement of those variables.
