Optimal Economic Growth (Steady State) and Public Expenditures In Iran (A Dynamic Analysis)

In this study, following Barro in an endogenous growth model, we try to determine the characteristic of an optimal economic growth. By considering two kinds of public expenditures that are: public capital and public services. The role and impacts of the regarded parameters such as time preference, depreciation rate and change in planning periods on the growth of economy is also investigated. Dynamic optimization is utilized in determination of optimal growth for Iran’s economy. For different planning periods and with various scenarios, the optimal tax and growth rates for variables such as gross national product, public capital, public services, private capital and consumption is simulated. The paper concludes a negative relation between time preference, depreciation and economic growth. It also finds a positive relation between horizons of planning periods and economic growth.