"This report extends, improves, and augments previous estimates of trends in the price and purity of five major illicit drugs"powder cocaine, crack cocaine, heroin, d-methamphetamine, and marijuana"using data from the 1981"2003 Drug Enforcement Administrations (DEAs) System to Retrieve Information from Drug Evidence (STRIDE) database. Series are extended in this study through the second quarter of 2003, so data for 2003 reflect only one-half year. Estimates are provided for three or four quantity levels for each substance and, where sufficient data exist, for five specific cities. All prices are adjusted for inflation and reported in 2002 dollars. Our primary national estimates for price and purity are based on formal econometric models used to analyze 'purchase' transactions from STRIDE. Further analysis developing purity estimates are based on both 'purchase' and 'seizure' transactions from STRIDE."
Office of National Drug Control Policy: http://www.whitehousedrugpolicy.gov/