Helland, Eric; Tabarrok, Alexander - In: Advances in Economic Analysis & Policy 4 (2004) 1, pp. 1182-1182
standard error function randomly generated from "placebo" laws. We find that the effect of shall-issue laws on crime is much … certainty in effects than is actually the case. We find that the placebo law technique (Bertrand, Duflo and Mullainathan 2002 …