A political regime has budgetary separation of powers if the power with the prerogative to raise taxes is not the full residual claimant of a tax increase. In the American states two conditions are needed: the governor must have the line item veto, and the political interests of the legislative...

We find the surprising result that the tax level is negatively correlated with the size of the Democratic majority in the interval in which the Democrats hold between 50 and 66% of the seats in the state Legislatures. This negative relationship suggests the failure of a simple ideological model...

We estimate a non-linear and discontinuous relationship between the tax level and the degree of alignment between the legislature and the governor, measured as the number of seats in the legislature that belong to the governor’s party. In the states with the line-item veto, there is a jump in...