The population elasticity is now slightly below one at . A higher rate of urbanization has the expected positive impact on emissions. The share of population in the economically active age groups now becomes marginally insignificant. The reason for this could be the high correlation between the two variables (partial correlation coefficient of ). Lastly, in column V we add the average household size to our model. Note that this variable is available for all countries in the sample, but not over the entire estimation period. Hence the number of observations is smaller in column V than in the other regressions. The population elasticity is again very close to unitary
