Is when the neoclassicals unwittingly produce a study – from the Journal of Public Economics - that shows that smoking bans lead to more drunk driving.

The authors, Scott Adams of the University of Wisconsin-Milwaukee Economics Department and Chad Cotti, currently at the University of South Carolina, call the results “surprising.”

“We thought we would see a reduction,” Adams said. “Our first thought was, ‘Throw it away, it must be wrong.’ ”

…Although Adams said he is not necessarily a policy advocate, he said a well-enforced national smoking ban would get rid of the drunken driving increases related to smoke bans.