The last three decades have witnessed a sharp increase in the number of states with spilt Senate delegations, featuring two senators of different parties. In addition, there is evidence that senators of different parties do not cluster in the middle: they are genuinely polarized. We propose a...

A paper like this does not lend itself to conclusions. The unifying theme of the paper is a question: when and why does Congress choose to modify social and/or economic behavior by establishing a regulatory agency rather than by writing a law to be enforced in the courts? This is a special case...