What I think I will do versus what I say I do: Mispredicting marijuana use among teenage drug users

We use data from a federally sponsored survey about teenagers' marijuana consumption in the United States. We find that, teenagers under predict future marijuana use and that this inaccuracy is moderated by the extent of use. We also find that misprediction is affected by both attitudes and the situation through main and interaction effects. We outline some policy implications of our findings.