We provide a definition of institutionalism and a schematic account that differentiates between institutional theories (in which institutions are exogenous) and theories of institutions, in which some (but not necessarily all) institutions are endogenous. Our primary argument is that...

A spatial theory of the comparative consequences of unified and divided government clarifies the relationship between institutions, partisanship and gridlock. Under formally specified conditions, executive and legislative institutions are shown to inhibit but not prohibit the convergence of...