Simultaneous Equation Modeling and Estimation of Consumption and Investment Functions in Nigeria

Godwin Lebari Tuaneh; Isaac Didi Essi

Simultaneous Equation Modeling and Estimation of Consumption and Investment Functions in Nigeria

Godwin Lebari Tuaneh and Isaac Didi Essi

Abstract

The study applied simultaneous equation in modelling and estimating consumption and investment function in Nigeria. Specifically, the study ascertained the trend of study variables within the period of the study, established the effects of affluence on private consumption expenditure as well as determined the marginal propensity to consume, and determined the effects of interest rates and affluence on Domestic Private Investment. The study adopted the quasi experimental design, on time series data from 1983 to 2016. Models were specified accordingly, the data were subjected to diagnostic test before the main analytical techniques were applied. The OLS result of the private consumption expenditure Model was somewhat different from the 2SLS and the 3SLS results, the 2SLS, and the 3SLS results were identical. All results of the domestic private investment model were somewhat different, however, the 2SLS, and the 3SLS results agreed closely. It was observed from this study that standard errors in OLS results were less than their 2SLS and 3SLS counterparts. Affluence was significant in affecting private consumption expenditure within the period of the study (t-cal =7.485, 0.000 < 0.05), Previous year domestic private investment was not (t-cal =0.120, 0.9050 > 0.05). Affluence and previous year Affluence (t-cal = 8.962, 0.000 < 0.05) and (t- cal = -6.412, 0.000 < 0.05) significantly affected domestic private investment, interest rate however did not (t-cal = 1.164, 0.000 < 0.05). It was consequently recommended that right hand side variables should be tested for endogeneity before decision on single equation or system equation estimation. Since affluence significantly affected private consumption expenditure and domestic private investment within the period of the study, it was necessary to formulate policies to increase per capita income

Keywords

Simultaneous EquationTwo Stage Least Squares (2SLS)Three Stage Least Squares (3SLS)Consumption functionInvestment function.

References

Adoghor, G. J., Onuchukwo, O. and Ewubare, D.B. (2008). Principles of Economics: A contemporary approach. Port Harcourt: Pearl Publishers. Ahuja, ( 2012). Modern Macroeconomics. New Delhi: Schan Publishers. Akekere, J., & Yousuo, P.O.J. (2010). Empirical analysis of change in income on private consumption expenditure in Nigeria from 1981 to 2010. International Journal of Academic Research in Business and Social Sciences, 2(12). Alimi R. S. (2013). Keynes' absolute income hypothesis and kuznets paradox, MPRA 49310, Retrieved from http://mpra.ub.uni-muenchen.de/49310/. Baghebo,M., & Edoumiekumo, S. (2012) Domestic private capital accumulation and economic development in Nigeria 1970-2010, International journal of academic research in business and social science,295, 69-88. Bakare, A.S. (2011). The determinants of private domestic investment in Nigeria. Far East Journal of Psychology and Business, 4(2). Central Bank of Nigeria (2013). Annual Report and Statement of Account, CBN. Abuja Central Bank of Nigeria (2014). Statistical Bulletin, 25, Abuja Central Bank of Nigeria (2016). Annual Report and Statement of Account, CBN. Abuja Central Bank of Nigeria (2016). Statistical Bulletin, 27: http://www.cenbank.org Essi, D. Nafo, M, and Amadi E. H. (2010). A note on indirect least squares and matrix partitioning, African Journal of mathematics and Computer Science Research 3(11), 282-287 Etuk, E. H. (2012). Predicting inflation rates of Nigeria using a seasonal Box-Jenkins model, Journal of Statistical and Econometric Methods, 1(3) Greene, W. H., (2008). Econometric Analysis, 6th ed. Pearson Prentice Hall, Upper Saddle River, NJ. Greene, W. H., (2012). Econometric Analysis, 7th ed. Pearson Prentice Hall, Upper Saddle River, NJ. Gujarati, D.N. (2003). Basic Econometrics. New York: Tafa MeGrew Hill Companies. Gujarati, D.N. (2013). Basic Econometrics. Glasgow: McGraw Hills. Koutsouyiannis, A. (2003) Theory of Econometrics. New York: Palgrve Lemi, A., & Asifa, S. (2001) Foreign direct investment and uncertainty: The case of African economies- proceedings of the international business research conference, Reno Nevada, October, 8-12 Mishra, P.K. (2011). Dynamics of the relationship between real consumption expenditure and economic growth in India, Indian Journal of Economics and Business, 10(4). Nwabueze J. C. (2009). Causal relationship between gross domestic product and personal consumption expenditure of Nigeria, African Journal of Mathematics and Computer Science Research, 2(8), 179-183. Ofwona, A C. (2013). An estimation of the consumption function for Kenya using Keynes absolute income hypothesis for the period 1992- 2011”, Journal of Emerging Trends in Economics and Management Sciences (JETEMS), 4(1), 103-105. Okidim, I. A., & Tuaneh, G. L (2012). Econometric analysis of the effectiveness of fiscal policy in economic growth and stability in Nigeria (1985- 2003). Journal of Economics and Sustainable Development. 3(9) 62-67 Olusegun, A.A. (2010). Role of government in explaining domestic investment in Nigeria. University of Pretoria Working Paper, 168. Patience, D., & Osaro, O.A. (2010). The trends and dynamics of the determinants of investment in Nigeria. International Review of Business Research Papers, 6(6) 159- 163. Sakib B. A. (2011). Causal relationship between consumption expenditure and economic growth in Bangladesh, World Journal of Social Sciences, 1(2), 158-169. Tapsin G., & Hepsag A. (2014) An analysis of household consumption expenditure in EA-18, European Scientific Journal, 10(16), 1-12. Wassel, C. S Jr., and Saunders, P. J. (2000). Time series evidence on social security and private saving: the issue revisited. Central Washington University.

Simultaneous Equation Modeling and Estimation of Consumption and Investment Functions in Nigeria

Abstract

Keywords

References

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