Learning to Hoard: The Effects of Preexisting and Surprise Price-Gouging Regulation During the COVID-19 Pandemic

Theory suggests anticipation of shortages stemming from price regulation can motivate households to stock up more and thereby aggravate the regulation-induced shortage. We test this theory on online shopping searches for two typically store-bought staples: hand sanitizer and toilet paper. Combining (i) interstate variation in type of price-gouging regulation—preexisting versus surprise versus none, (ii) their temporally staggered implementation, and (iii) the demand surges for hand sanitizer and toilet paper during the COVID-19 pandemic facilitates identifying the impacts of different price-gouging regulation on consumer searches. Our results are consistent with price-gouging regulation–driven anticipatory hoarding. Difference-in-differences estimates reveal that states with preexisting-regulation experience the largest increases in post-implementation search proportions for both products. Accounting for potential endogeneity of implementation using a nearest-neighbor matching strategy reveals states that make surprise announcements of new regulation during the pandemic also experience larger increases in post-activation hand sanitizer search proportions than states without any such policy, but smaller increases than what preexisting-law states experience. These results corroborate the theoretical predictions about consequences of regulation-induced anticipation of shortages and inform the current policy debate surrounding impacts of price-gouging laws. Fundamentally, our results indicate behavioural responses to policy evolve as experience reveals the effects of the policy, and this evolution might influence the welfare consequences of the policy.