The government influences the equilibrium size of hidden activity. Higher taxes give an incentive to evade. The provision of public services, social transfers and public employment may have offsetting effects on the underground economy. The budget constraint makes the relation between the shadow...

Since Sandmo (1981), many articles have analyzed optimal fiscal policies in economies with tax evasion. All share a feature: they assume that the cost of enforcing the tax law is exogenous. However, governments often invest resources to reduce these enforcement costs. In a very simple model, we...