TY - DATA T1 - Estimating the Elasticities of Demand for Cocaine and Heroin with Data from 21 Cities from the Drug Use Forecasting (DUF) Program, 1987-1991 AU - Caulkins, Jonathan P. PY - 2006 DO - 10.3886/ICPSR06567.v1 PB - Inter-university Consortium for Political and Social Research [distributor] ER -