Is cannabis a gateway to hard drugs?
The gateway hypothesis proposes that cannabis use increases the risk of starting to consume hard drugs. We test this controversial, but influential, hypothesis on a sample of cannabis users employing a unique set of drug prices. A flexible approach is developed to identify the causal gateway effect using a bivariate survival model with shared frailty estimated using a latent class approach. The model suggests two distinct groups; a smaller group of “troubled youths” for whom there is a statistically significant gateway effect that doubles the hazard of starting to use hard drugs and a larger fraction of “most youths” where previous cannabis use has little impact.
|Date of creation:||Jan 2007|
|Date of revision:|
|Contact details of provider:|| Postal: HEDG/HERC, Department of Economics and Related Studies, University of York, York, YO10 5DD, United Kingdom|
Phone: (0)1904 323776
Fax: (0)1904 323759
Web page: http://www.york.ac.uk/economics/postgrad/herc/hedg/
More information through EDIRC
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- James J. Heckman & Salvador Navarro, 2005.
"Dynamic Discrete Choice and Dynamic Treatment Effects,"
NBER Technical Working Papers
0316, National Bureau of Economic Research, Inc.
- Heckman, James J. & Navarro, Salvador, 2007. "Dynamic discrete choice and dynamic treatment effects," Journal of Econometrics, Elsevier, vol. 136(2), pages 341-396, February.
- Heckman, James J. & Navarro, Salvador, 2005. "Dynamic Discrete Choice and Dynamic Treatment Effects," IZA Discussion Papers 1790, Institute for the Study of Labor (IZA).
- Pacula, Rosalie Liccardo, 1998. "Does increasing the beer tax reduce marijuana consumption?," Journal of Health Economics, Elsevier, vol. 17(5), pages 557-585, October.
- Gaure, Simen & Røed, Knut & Zhang, Tao, 2005.
"Time and Causality: A Monte Carlo Assessment of the Timing-of-Events Approach,"
19/2005, Oslo University, Department of Economics.
- Gaure, Simen & Roed, Knut & Zhang, Tao, 2007. "Time and causality: A Monte Carlo assessment of the timing-of-events approach," Journal of Econometrics, Elsevier, vol. 141(2), pages 1159-1195, December.
- Jeffrey DeSimone, 1998. "Is Marijuana a Gateway Drug?," Eastern Economic Journal, Eastern Economic Association, vol. 24(2), pages 149-164, Spring.
- J. Williams, 2004. "The effects of price and policy on marijuana use: what can be learned from the Australian experience?," Health Economics, John Wiley & Sons, Ltd., vol. 13(2), pages 123-137.
- Beenstock, Michael & Rahav, Giora, 2002. "Testing Gateway Theory: do cigarette prices affect illicit drug use?," Journal of Health Economics, Elsevier, vol. 21(4), pages 679-698, July.
- Jaap H. Abbring & Gerard J. van den Berg, 2003. "The Nonparametric Identification of Treatment Effects in Duration Models," Econometrica, Econometric Society, vol. 71(5), pages 1491-1517, 09.
- Jenkins, Stephen P, 1995. "Easy Estimation Methods for Discrete-Time Duration Models," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 57(1), pages 129-38, February.
- Stephen Pudney, 2003. "The Road to Ruin? Sequences of Initiation to Drugs and Crime in Britain," Economic Journal, Royal Economic Society, vol. 113(486), pages C182-C198, March.
- Anne Line Bretteville-Jensen & Erik Bi¯rn, 2003. "Heroin Consumption, Prices and Addiction: Evidence from Self-reported Panel Data," Scandinavian Journal of Economics, Wiley Blackwell, vol. 105(4), pages 661-679, December.
- Deb, Partha & Trivedi, Pravin K, 1997. "Demand for Medical Care by the Elderly: A Finite Mixture Approach," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 12(3), pages 313-36, May-June.
When requesting a correction, please mention this item's handle: RePEc:yor:hectdg:07/01. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Jane Rawlings)
If references are entirely missing, you can add them using this form.