برآورد تابع تقاضاي آب خانگي

Estimating the Residential Water Demand Function

The present paper applied Co integration Vector Autoregressive (CVAR) Technique to Stone-Gearyʹs linear expenditure system, in order to estimate the residential demand for water in Metropolitan Tehran. Data used are for 1982-2000 period. Price-elasticity of the demand function is estimated as 8% for the point elasticity, and 12% for the average of duration. The income elastisities are estimated as 13% and 20%, respectively. This shows that the price elasticity of demand for water is inelastic. It is also indicated that the minimum use of water by Tehrani Citizens is 92 liters per-person per-day which is in the range of standard water use.