Domestic private investment (DPI) plays significant role in economic growth of any economy. It helps in mobilizing domestic resources for socio-economic advancement. Domestic Investment and its determining factors remains one recalling issues in the field of economics and international finance. This is based on the fact that aggregate investment plays a dominant role in stimulating economic growth and development of every nation. However, most of the developing and underdeveloped economies have witnessed low domestic investment and consequently slow economic growth. Therefore, this study investigates the relationship, trends, and impact of domestic private investment and selected macroeconomic indicators in Nigeria, a developing economy. The study analyzed data gotten from the CBN Statistical Bulletin for the duration of 1991-2020. The statistical package used for the study is Econometric Views (E-Views 9.0). Multiple regression techniques via OLS, Augmented Dickey Fuller (ADF) test and Granger causality procedure was applied to determine causalities while Johansen Co-integration test was administered to verify sustainability of the long-run relationships. The result revealed that there exist short and long-run relationships between domestic private investment and key macroeconomic variables- Inflation, Lending rates, gross domestic savings, real gross domestic product, money supply in Nigeria. Vector error correction model was also adopted to determine the speed of adjustment between the independent variables and the dependent variables. The OLS result revealed that there exist a positive and significant relationship among GDSA, BMOS, RGDP and PDIV, negative and significant relationship among PLER, INFR, and PDIV. Therefore, the study recommends among others that Nigerian government must be resolute in their resolve to drive private domestic investment in the country by implementing appropriate monetary and fiscal policies that address inflation, interest rate, domestic savings and money supply. This will no doubt fast track inclusive growth.
Keywords: Economy, Interest Rate, private domestic investment
