By the same authors

From the same journal

From the same journal

Is cannabis a gateway to hard drugs?

Research output: Contribution to journalArticle

Published copy (DOI)



Publication details

JournalEmpirical Economics
DatePublished - Jun 2010
Issue number3
Number of pages21
Pages (from-to)583-603
Original languageEnglish


The gateway hypothesis proposes that use of cannabis directly increases the risk of consuming hard drugs. We test this controversial, but influential, hypothesis on a sample of cannabis users, exploiting a unique set of drug price data. 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 more than doubles the hazard of starting to use hard drugs and a larger fraction of youths for whom previous cannabis use has less impact.

Bibliographical note

M1 - 3

    Research areas

  • Gateway hypothesis, Illicit drugs, Duration analysis, Latent class models, DURATION MODELS, MARIJUANA USE, CONSUMPTION, PROGRESSION, PRICES, TIME

Discover related content

Find related publications, people, projects, datasets and more using interactive charts.

View graph of relations