The purpose of this paper is to compare the equilibrium condition of simple reproduction economy. In section 2 we analyze 4 cases in a closed economy where there is no government. In section 3 we analyze 4 cases in an open economy where there is a government. The constant profit case in a closed economy isn't sustainable. In an open economy the constant profit case economy is sustainable if government expenditure or goods and service balance are large. Consumption or wage constant economy have the largest GDP in both closed and open economy.