We study a Singaporean drug-selling gang's dataset and empirically find that the gang's pushers purchased larger quantities of drugs during periods of enforcement shocks caused by enforcement activities targeting the gang's drug supply chain. This counter-intuitive finding can be explained by...

We estimate a structural model of borrowing and lending in the illegal money lending market using a unique panel survey of 1,090 borrowers taking out 11,032 loans from loan sharks. We use the model to evaluate the welfare effects of alternative law enforcement strategies. We find that a large...