Harvard economist Jeff Miron and Elina Tetlebaum of Yale argue why the federally-mandated 21 year-old drinking age has been ineffective.
Our research compares traffic fatality rates in states before and after they changed their MLDA from 18 to 21. In contrast to all earlier work, however, we examined separately the impact in states that adopted an MLDA21 on their own and those that were coerced by the FUDAA.
The results are striking. Virtually all the life-saving impact of the MLDA21 comes from the few early-adopting states, not from the larger number that resulted from federal pressure. Further, any life-saving effect in those states that first raised the drinking age was only temporary, occurring largely in the first year or two after switching to the MLDA21.
Our results thus challenge both the value of the MLDA21 and the value of coercive federalism. While we find limited evidence that the MLDA21 saves lives when states adopted it of their own volition, we find no evidence it saves lives when the federal government compels this policy.
HT Instapundit