AP Photo

The phrase "job-killing regulation" has become a standard part of the political lexicon this campaign season, most often used to disparage President Barack Obama's energy and environmental policies.

But a new report suggests we ought to take claims of regulatory-related unemployment with a grain of salt. The Institute for Political Integrity, a nonpartisan think tank associated with the New York University School of Law, finds many of the studies purporting to show mass job losses -- or gains -- from environmental rules use poorly executed economic models ...