Economics - Research Publications
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ItemWhy parents worry: Initiation into cannabis use by youth and their educational attainmentVAN OURS, J. ; WILLIAMS, J. ( 2009)
ItemCannabis prices and dynamics of cannabis usevan Ours, JC ; Williams, J (ELSEVIER SCIENCE BV, 2007-05-01)This paper uses duration models and self-reported cannabis histories from young Australians to study the dynamics of cannabis use. We find that low cannabis prices are associated with early initiation into cannabis use. While the decision to quit does not appear to be directly influenced by price, we find that the younger an individual is when they start using cannabis the less likely they are to quit. Therefore, low cannabis prices lead to early use and because of that they lead to a low quit rate and hence a longer duration of use.
ItemThe effects of price and policy on marijuana use: what can be learned from the Australian experience?Williams, J (JOHN WILEY & SONS LTD, 2004-02-01)This research examines the responsiveness of the demand for marijuana to changes in its money price and criminal status using data on individuals from the Australian National Drug Strategy's Household Surveys (NDSHS). The results suggest that both the prevalence of marijuana use and the conditional demand for marijuana in the general population are responsive to changes in its money price. Significant differences are found in the effect of price on participation in marijuana use across age-groups, with participation by youth more price sensitive than participation by older age-groups. Similarly, the effect of the legal status of marijuana use on the participation decision is found to differ across age-groups and gender. Specifically, decriminalisation is associated with an increases in the prevalence of use by males over the age of 25. There is no evidence that decriminalisation significantly increases participation in marijuana use by either young males or females, or that decriminalisation increases the frequency of use among marijuana users.
ItemEconomic relationship between alcohol and cannabis revisitedWilliams, J ; Mahmoudi, P (WILEY, 2004-03-01)
ItemAlcohol and marijuana use among college students: economic complements or substitutes?Williams, J ; Pacula, RL ; Chaloupka, FJ ; Wechsler, H (JOHN WILEY & SONS LTD, 2004-09-01)Previous research has shown that the recent tightening of college alcohol policies has been effective at reducing college students' drinking. Over the period in which these stricter alcohol policies have been put in place, marijuana use among college students has increased. This raises the question of whether current policies aimed at reducing alcohol consumption are inadvertently encouraging marijuana use. This paper begins to address this question by investigating the relationship between the demands for alcohol and marijuana for college students using data from the 1993, 1997 and 1999 waves of the Harvard School of Public Health's College Alcohol Study (CAS). We find that alcohol and marijuana are economic complements and that policies that increase the full price of alcohol decrease participation in marijuana use.
ItemDoes alcohol consumption reduce human capital accumulation? Evidence from the College Alcohol StudyWilliams, J ; Powell, LM ; Wechsler, H (ROUTLEDGE TAYLOR & FRANCIS LTD, 2003-07-10)