| Resumen: | We study household decisions to acquire energy-using assets in the presence  of  rising  incomes. We  develop  a  theoretical framework to characterize the effect of income growth on asset purchases when consumers face credit constraints. We use large and plausibly 
exogenous shocks to household income generated by the conditional-cash-transfer program in Mexico, Oportunidades, to show that asset acquisition  is  nonlinear, depends, as predicted in the presence of credit constraints, on the pace of income growth, and both effects are economically large among beneficiaries. Our results may help explain important  worldwide  trends  in  the relationship between energy use and income growth. |