Participation and Consumption of Illegal Drugs among Adolescents

This paper identifies the determinants affecting the adolescent populations' decision regarding whether or not to consume illegal drugs. The authors estimate a simultaneous Type II Tobit model for each sample substance, including marijuana, LSD, amphetamines, cocaine, volatile substances, and heroine. The data are drawn from three Spanish Surveys on Drug Use in the School Population conducted in 1994, 1996, and 1998. The results indicate that illegal drug use among Spanish adolescents is clearly determined by economic variables. It is similarly determined by other sociodemographic variables, such as personal habits, family environment, and the receipt of information regarding the negative consequences of drug use. This paper was partially written while José Alberto Molina was Visiting Researcher at the Fundación de Estudios de Economía Aplicada-FEDEA (Madrid, Spain), to which he would like to express his thanks for the hospitality and facilities provided. The authors are grateful to two anonymous referees for their helpful observations on an earlier version of this paper. Similarly, Namkee Ahn, as well as various participants at the XIX Spanish Health Economics Meeting (Zaragoza, Spain) and at the 2001 Annual Meeting of the Population Association of America (Washington DC), have all offered valuable comments and suggestions. Finally, the authors would like to express their gratitude for the financial support provided by the Spanish Ministry of Education-CICYT and the European Commission (Project FEDER 2FD97-2057). The usual disclaimer applies.