摘要
The aim of this study is to examine the effects of water sector investment on Iran economic development. In this study, in order to see the effects of water sector investment from production function [view] of Solo growth model (assuming constant return to scale), we use [data from] Economic Time Series Database of National Accounts in[sources as] Central Bank, Vice-Presidency for Strategic Planning and Supervision, and Iran Water Resources Management Co., which were gathered during 1980-2010. The amount of this effect is exploited from the model in question on four economic sectors in Iran; and its econometric method is Panel Data. The results show that continuing trend in population growth, indiscriminate use of resources and low efficiency intensify water shortages. Solo Growth Model (primary neo-classic one) for different sectors (agriculture, industry and mine, services, and petroleum sectors) in Iranian economy implies that the elasticity of water investment in agricultural sector is significant, and positive, with the amount of 1.3% and for the rest of the other sectors is non-significant. The investment effect of water sector for groundwater discharge is about 2.4 per cent which is significant; this maintains the important issue that by increasing investment, the amounts of water harvesting is not decreased. Conversely was happened for surface waters with the amount of about -2.7%. The elasticity of investment in water sector based on Solo Growth Model, justified for economic sectors of Iran with confidence coefficient of 66% is less than 1, about 0.02% in agricultural sector, and for the rest of the other sectors is negative and non-significant.