%0 Report
        %A Hansen, Jörgen
%A Davalloo, Golnaz
        %T Persistent Marijuana Use: Evidence from the NLSY
        %D 2023
        %8 2023 Sep
        %I Institute of Labor Economics (IZA)
        %C Bonn
        %7 IZA Discussion Paper
        %N 16446
        %U https://www.iza.org/publications/dp16446
        %X We analyze persistence in marijuana consumption utilizing data from the 1997 cohort of the National Longitudinal Survey of Youth (NLSY97). We allow for three sources of persistence: pure state dependence, time invariant unobserved heterogeneity and persistence in idiosyncratic, time-varying shocks. We also consider intensity of consumption based on days of use per month and estimate a dynamic ordered Probit model using simulated Maximum Likelihood. We consider a Polya model that generalizes the more commonly used Markov models. The results show that there is a causal eect of previous use. However, ignoring unobserved heterogeneity and serially correlated shocks signicantly exaggerates the state dependence.
        %K marijuana
%K persistence
%K state dependence
%K Polya model
%K unobserved heterogeneity
%K dynamic ordered probit
%K simulation
%K NLSY