This paper aims to explore the nonlinear relation between investments and GDP. The method of neural network is used to construct two nonlinear models of GDP in relation to domestic investments, foreign direct investments and real interest rate. The results show that the two neural models present...

From a theoretical point of view, uncertainty may have an impact on investment by different channels and in different directions. Thus, the sign of its overall effect is unknown and could be found only empirically from the historical data. This paper analyzes the relation between macroeconomic...