Journal for Studies in Management and Planning Available at

One of the macro-economic objectives of a country is to achieve full employment and domestic investment serves as an instrument in achieving it. Also the important of investment to an economy cannot be overemphasized. This research paper examines the “determinant of investment in Nigeria: an econometrics analysis ” with the following objectives; to determine the impact of interest rate volatility on investment decision in Nigeria, to investigate, ascertain and unravel other determinants of investment decision in Nigeria, to investigate the trend profile of investment in Nigeria and to examine different theory of investment. In order to achieve the stated objectives an econometrics model was used Autoregressive Distributed lag model (ARDL) in estimating the long-run and short-run coefficients of variables. in the long-run, it shows that past income level, capital investment, government size and interest rate are the major determinants of domestic investment in Nigeria and these variables have a positive effective on private investment in Nigeria. Exchange rate and inflation have an insignificant affect on private investment in Nigeria and the researcher recommends the need to ensure policy consistence and reduce the level of interest rate so as to attract and improve the level of investment in the country