Last week, Mercatus published a new working paper that I coauthored with Pavel Yakovlev of Duquesne University. It addresses an understudied institutional difference between states. Some state legislative chambers allow one committee to write both spending and taxing bills while others separate these functions into two separate committees.
This institutional difference first caught my eye a few years ago when Nick Tuszynski and I reviewed the literature on institutions and state spending. Among 16 different institutions that we looked at—from strict balanced budget requirements to term limits to “item reduction vetoes”—one stood out. Previous research by Mark Crain and Timothy Muris had found that states in which separate committees craft taxing and spending bills spend significantly less per capita than states in which a single committee was responsible for both kinds of bills. As you can see from the figure below (click to enlarge), the effect was estimated to be many times larger than that found for almost any other institution:
But as large as this effect seems to be, the phenomenon has largely been ignored. To our knowledge, Crain and Muris are the only ones to have studied it. Their paper was now two decades old and was based on a relatively small sample of years from the 1980s.
As I wrote in yesterday’s Economics Intelligence column for US News:
To get a fresh look at the phenomenon, my colleagues and I consulted state statutes, legislative rules, committee websites and members’ offices. We created a unique data set that for some states spans 40 years. We took a cautious approach, coding taxing and spending functions as not separate in any chambers in which it was possible for a tax bill to come out of a spending committee and vice versa. We found that in 25 states, these functions are separate in both chambers, in 7 states they are separate in one chamber, and in the rest, these functions are separate in neither chamber.
To control for other confounding factors, we also gathered data on economic, demographic, and institutional differences between the states. Controlling for these factors, we found that separate taxing and spending committees are, indeed, associated with less spending. To be precise:
Other factors being equal, we find that those states with separate taxing and spending committees spend between $300 and $450 less per capita (between $790 and $1,200 less per household) than other states.