Welfare and business cycles in an economy with evasion and underground sector

Using a Dynamic Stochastic General Equilibrium Model (DSGE) in which the levels of evasion of the firms and the allocation of work and capital to an underground sector of the economy are endogenously determined, we exercise different policies in scenes with anticipated and not anticipated measures, with independent and dependant stochastic shocks. In all the cases the results are analyzed on the welfare costs of the agents and the economic cycles. The results of the model depend on important way of an indicator of governmental effectiveness in agreement with the empirical evidence. We found that the existence of the underground economy can reduce the volatility of the total of the economy and its effects on the welfare rest in the externalities degree that the productive sector receives from the government.Underground Economy; Evasion; DSGE