Racial Disparities in Motor Vehicle Searches Cannot Be Justified by Efficiency

During traffic stops, police search black and Hispanic motorists more often than white motorists, yet those searches are equally or less likely to yield contraband. We ask whether equalizing search rates by motorist race would reduce contraband yield. We use unique administrative data from Texas to isolate variation in search behavior across highway patrol troopers and find that, across troopers, search rates are unrelated to the proportion of searches that yield contraband. Our results imply that, in partial equilibrium, troopers can equalize search rates across racial groups, maintain the status quo search rate, and increase contraband yield.