فرا تحليل کشش‌هاي قيمتي مصرف آب خانگي شهري در ايران
Journal Title: آب و فاضلاب - Year 2018, Vol 29, Issue 1
Abstract
Meta-Analysis of Price Elasticity for Urban Domestic Water Consumption in Iran Price elasticity plays a critical role in determining water tariff and its system. Many economic decision makers and researchers have estimated demand function for different cities in order to predict the associated incomes and price elasticities. This research reviewes 20 studies on urban domestic water demand function from which 63 price elasticity values are obtained. Since the price elasticity values obtained from these studies revealed significant statistical differences, this research intends to determine the effective factors in price elasticity values as well as to analyze differences in those values using meta-analysis technique. The meta-analysis technique focuses on variation in water price elasticity results. The statistical meta-analysis technique focuses on two main objectives; namely publication bias and publication heterogeneity in reported results. The results indicated that publication bias is negligible while publication heterogeneity is significant. The major factors affecting price elasticity values are classified into 4 categories including theoretical, model, data and socio-geographical specifications. The results indicated that variables such as income, time-series datasets, natural logarithm function and use of stone-geary theory, which is the basis for predicting many domestic water demand functions, significantly overestimate the price elasticity values. In addition, the geographical condition of the region, population density and use of OLS technique in estimating the demand parameters underestimates the price elasticity values.
Authors and Affiliations
Leili Abolhasani, Naser Shahnooshi, Mina Tajabadi
Keywords
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