Noel Johnson, Matt Mitchell, and Steve Yamarik have a new working paper answering that question in the affirmative. They look at state fiscal and regulatory policies and find that Democrats generally like to increase taxes and spending when in control of state houses and Republicans do the reverse. But when states have tough balanced-budget requirements called “no-carry rules,” Democrats and Republicans don’t differ much on fiscal policy. Instead they try to appeal to their constituencies by pursuing regulatory policies – in general, Democrats increasing regulation and Republicans cutting it. As the paper’s still in the working draft stage, they are looking for comments on it.