According to an influential theoretical argument, presidential systems tend to present smaller governments because the separation between those who decide the size of the fiscal purse and those who allocate it creates incentives for lower public expenditures. In practice, forms of government...

In this essay I review the new book by Torsten Persson and Guido Tabellini, The Economic Effects of Constitutions, which investigates the policy and economic consequences of different forms of government and electoral rules. I also take advantage of this opportunity to discuss the advantages and...