The econometric results are presented in Table 4, where, for the sake of brevity, the
coefficients on the dummy variables are not reported. To examine the validity of our
instruments we apply Hansen’s J test, where the null hypothesis is that the instruments as a
group are exogenous. The p-values of the Hansen J statistics fail to reject the null hypothesis,
implying that our instrument set is robust. Moreover, the Jarque-Bera statistics indicate that
the residuals from the estimated equations are normally distributed.