Barely Significant

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highly significantqualifiedgold
The instruments are highly significant in the first stage regression (J statistics between 13.2 and 22.2 corresponding to p-values of zero for the instruments’ joint significance in the first stage regressions); over-identification tests fail to reject the validity of our instruments and Wald test of exogeneity fail to reject the exogeneity of the popularity of smokers and non-smokers’ suggesting that a single equation probit model may be more appropriate (we can reject exogeneity at the 10% level in one regression, having ever smoked regularly by 2009; yet, results still hold).
We find that while the model more precisely estimates the effect of income, the predictive capacity of our four variables of interest, as well as of the model in its entirety, appears to be lower compared to the one-year model predicting behavioral trust (column 2), however, differently from model 2, we find that the income estimate is marginally significant.
We also tested for a correlative relationship between abundance of Δ9-THC in leaves and flowers and detected a slight trend between Δ9-THC content in leaf and only the flowers from the upper portions of the plant however there was insufficient statistical support for this relationship ( S1 Fig ).