Residential Electricity Demand in Mexico: A Model Distinguishing Access from Consumption
研究发现，在墨西哥这样的发展中国家，收入增长通过增加电力接入户数和提高已接入户的消费量双重影响电力需求，两者联合弹性大于1，有助于解释文献中较大的收入弹性估计值。
A principal finding of this paper is that, for a developing country like Mexico, increases in income have an important double-whammy impact on electricity consumption - first in terms of increasing the number of households hooked-up to electricity services, and second in terms of increasing the consumption of households already having access to electricity. While each of the components has estimated long-run income elasticity values of less than unity, their joint effect has been estimated to be considerably larger than one. The authors feel this structural distinction between access and consumption helps in understanding and making more credible the large reduced form residential-energy income elasticity estimates for developing countries that have been reported in the literature. One empirical result requiring further investigation is why own-price elasticity estimates are smaller (in absolute value) with the pooled regional, time-series data than with the aggregate time-series data. Finally, the authors found that, on empirical grounds, there is a clear preference for results based on the logistic electricity hook-up specification. Since this specification is also preferable intuitively, they suggest its use be extended in future studies of electricity demand in developing countries.