These data about criminal cocaine use were used to test the efficacy of two competing theoretical models of criminal or delinquent behavior, employing both tabular and multiple regression techniques. Differential association theory, that criminal behavior is learned in a complex process occurring within intimate social groups, was found to be far more effective in explaining the use of cocaine than control theory, which postulates that delinquency is a result of insufficient bonding to conventional society. 2 tables, 40 references (Author abstract modified)