Vol 1 No 1 (2018)
Research Articles

Effectiveness Analysis of Agricultural Protection Policy on Food Supply, Export and Farmer-Welfare in Nigeria: Generalized Method of Moment Approach

Emmanuel Ejiofor Omeje
University of Nigeria Nsukka, Faculty of Agriculture, Department of Agricultural Economics, Nsukka, Enugu State, Nigeria
Chukwuemeka John Arene
University of Nigeria Nsukka, Faculty of Agriculture, Department of Agricultural Economics, Nsukka, Enugu State, Nigeria
Benjamin Chiedozie Okpukpara
University of Nigeria Nsukka, Faculty of Agriculture, Department of Agricultural Economics, Nsukka, Enugu State, Nigeria
Published November 17, 2018
  • Agricultural protection, effectiveness, self-food supply, agricultural export, farmer-welfare, generalized method of moment.
How to Cite
Omeje, E. E., Arene, C. J., & Okpukpara, B. C. (2018). Effectiveness Analysis of Agricultural Protection Policy on Food Supply, Export and Farmer-Welfare in Nigeria: Generalized Method of Moment Approach. American International Journal of Agricultural Studies, 1(1), 38-59. https://doi.org/10.46545/aijas.v1i1.16


This study examined the effectiveness of agricultural protection policy and other macroeconomic variables on food supply, agricultural export, and farmers welfare in Nigeria, from 1980-2016 with a special interest in their relationship with the political economy. The specific objectives were to (i) estimate the degrees of agricultural protection, domestic agricultural food supply and economic welfare to farmers in Nigeria, (ii) determine the effectiveness of agricultural protection on food self-supply, agricultural export; and farmer-welfare. Data were obtained from secondary sources. Descriptive statistics and generalized method of moment (GMM) were used. Nigeria’s self-food supply was slightly above 50% while the rest of the consumption depended on importation. The welfare measure to farmers was relatively poor and not good enough to motivate them. There was a positive and significant relationship between export and agricultural protection. A significant and positive relationship also exists between farmer-welfare and protection in the sector.


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  1. ABOU, N., & TAKOR, W. (1999). Tax incentives in Lebanon. A Paper Presented at the United Nations Conference on Trade and Development (UNCTAD) at the Expert Meeting on Tax Incentives; 7-8.
  2. AKANEGBU, B.N. (2015). Agricultural price distortions and their effects on the Nigerian economy: An Empirical Analysis. European Journal of Research in Social Sciences. 3 (1). ISSN 2056-5429
  3. AMIN, S. (1972). Underdevelopment and dependence in black Africa: Origins and contemporary forms. Journal of Modern African Studies, 10(4), 503-24.
  4. ARENE C.J. (2008b). Agricultural Economics: a functional approach. Prize Publishers, Enugu Nigeria.
  5. AYOOLA, G.B., AINA, B.M., NWEZE, N., ODEBIYI, T., OKUNMADEWA, F., SHEHU D., WILLIAM O. & ZASHA, J. (2000). Nigeria: Voice of the Poor, Country Synthesis Report, World Bank.
  6. BALDWIN, ROBERT, (1982). The Political Economy of Protectionism: In Import Competition and Response, ed. Jagdish N. Bhagwati. Chicago: University of Chicago Press.
  7. BARETTE, C.B. (1999). Micro-economics of the development paradox on the political economy of food price policy. Agricultural Economics 20(1999) 159-172.
  8. BEGHIN, J.C & M. KHERALLAH (1994), “Political Institutions and International Patterns of Agricultural Protection”, Review of Economics and Statistics 76(3): 482-489.
  9. BEGHIN, J.C & M. KHERALLAH (1994), “Political Institutions and International Patterns of Agricultural Protection”, Review of Economics and Statistics 76(3): 482-489.
  10. BRIGGS, I.N. (2005). Nigeria: protecting domestic production in terms of liberalization and the short, medium and long term implication for regional integration. A paper presented at the ECOWAS Regional workshop on Multilateral Trade Agreements, parliament of Ghana and Friedrich-Ebert-Stiftung, Accra, Ghana, November 27, 2005.
  11. CIA WORLD FACTBOOK (2015). The World Factbook. Retrieved November 26, 2015, from www.cia.gov
  12. COOPER, F. (2002). Africa since 1940: The Past of the Present. Cambridge.
  13. DE GORTER, H. & TSUR, Y. (1991). Explaining price bias in world agriculture: The calculus of support maximizing politicians. American Journal of Agricultural Economics, 73,1244-54.
  14. DE MELO, J.A.P. (1978). Protection and resources allocation in walrasian trade model. International Economic Review, 19, 25-43.
  15. FAO. (2012). Foreign Agriculture Investment Profile - Nigeria. Food and Agriculture Organization (FAO) Investment Policy Support. Retrieved February 16, 2016, from http://www.fao.org/fileadmin/user_upload/tcsp/docs/Nigeria_Country_Profile_FINAL.pdf
  16. GARDNER, B.L. (1987), “Causes of U.S. Farm Commodity Programs”, Journal of Political Economy 95(2), 290-310.
  17. GARDNER, L. (2012). Taxing colonial Africa: The political economy of British imperialism. (Oxford U. Press, 2012), Ch. 1, an Introduction to the Problem of Colonial Taxation. pp. 1-13.
  18. GOLDIN, I. & KNUDSEN, O. (ED). (1990). Agricultural Trade Liberalization: Implication for developing countries. Paris OECD and World Bank.
  19. GOMES, G.M. (1999). State level tax incentives in Brazil. A Paper presented at the expert meeting on tax incentives; pp 8-9.
  20. GRAIS, W., DE MELO, J., & URATA, S. (1986). A general equilibrium estimation of the reduction of tariffs and quantitative restrictions in Turkey in 1978. In Thirukodikaval Srinivasan, John Whalley, (Eds.), General equilibrium trade policy modeling. Cambridge, MA.
  21. HARBERGER, A.C. (1959). The fundamentals of economic progress in underdeveloped countries: Using the resources at hand more efficiently. American Economic Review, 49, 134-146.
  22. HOLLAND, M. (1996). Income tax incentives for investment. A Ph.D Dissertation Submitted to the Department of Economics and Finance, National University of Singapore.
  23. HONMA, M. & HAYAMI, Y. (1986). Structure of agricultural protection in industrial countries. Journal of International Economics, 20, 115-129.
  24. IKPI, A.E (1989). Understanding the rural farmers for effective adoption of improved agricultural technology and impact modelling, IITA, Research Monograph No4, Ibadan, Nigeria.
  25. INHWAM, J. (2008). Determinants of Agricultural Protection in Industrial Countries. An Empirical Bulletin, 17 (1), 1-11.
  26. International Food and Agricultural Development (IFAD). (2016). Poverty in Rural Nigeria. www.ruralpovertyportal.org/country/home/tags/nigeria/IFAD
  27. JOACHIM, Z. & VALDES, A. (1993). Growth of Agricultural Protection. Trade and Protectionism, NBER-EASE Volume 2, University of Chicago Press ISBN: 0-226-38668-6. Accessed from URL: http://www.nber.org/chapters/c8073
  28. JOSLING, T. (1975). The world food problem. Food Policy, 1 (1), 3–14.
  29. JOSLING, T. E. & VALDES, A. (2004). Agricultural Policy Indicators. ESA Working Paper No. 04-04. Agricultural and Development Economics Division. The Food and Agriculture Organization (FAO) of the United Nations.
  30. KIABEL, B.D. & NWIKPASI, N.N. (2001). Selected aspect of Nigerian taxes. Owerri; Springfield Publishers
  31. KRUEGER, A. O. (1992). The Political Economy of Agricultural Pricing Policies: Volume 5: A Synthesis of the Political Economy in Developing Countries. A World Bank Comparative Study, Baltimore, MD: John Hopkins University Press for the World Bank.
  32. KRUEGER, A.O. (1978). Liberalization attempts and consequences. New York: National European Journal of Research in Social Sciences Vol. 3 No. 1, 2015 ISSN 2056-5429 Progressive Academic Publishing, UK Page 98 www.idpublications.org Bureau for Economic Research.
  33. KRUEGER, A.O., M. SCHIFF & VALDES, A. (1988). Agricultural Incentives in Developing Countries: Measuring the Effects of Sectoral and Economy-wide Policies, World Bank Economic Review 2(3), 255-72, September.
  34. National Bureau of Statistics [NBS], (2017). National population figures. Retrieved November 22, 2017, from http://www.nigerianstat.gov.ng
  35. NJOKU,C.O., CHIGBU, E.E. & AKUJUOBI, A.B.C. (2015). Public Expenditure and Economic Growth in Nigeria (A Granger Causality Approach) 1983-2012. Management Studies and Economic Systems (MSES), 1 (3), 147-160, Winter 2015.
  36. OECD (2018). Producer protection (indicator). doi: 10.1787/f99067c0-en (Accessed on 04 October 2018).
  37. OGHOGHOMEH, T. (2014). An assessment of agribusiness tax incentives in Nigeria. international journal of business and economic development Vol. 2 Number 1 March 2014. www.ijbed.org
  38. OKUMADEWA, F. (1997). Poverty and income in Nigeria: Measurements and Strategies for reform: A Paper Presented at the Vision 2010 Workshop, Abuja.
  39. OLATOMIDE W.O. & OMOWUMI A.O. (2013). Policy interventions and public expenditure reform for pro-poor agricultural development in Nigeria. African Journal of Agricultural Research. Vol. 9(4), pp. 487-500, (http://www.academicjournals.org/AJAR).
  40. OLAWEPO R. A. (2010). Determining rural farmers’ income: A rural Nigeria experience. Journal of African Studies and Development, 2(4), 99-108.
  41. OLPER, A. (1998). Political Economy Determinants of agricultural protection levels in EU Member States: an empirical investigation. Eoropean Review of Agricultural Economics, 25,463-487.
  42. OWUTUAMOR, Z.B. AND ARENE, C.J. (2018). The impact of foreign direct investment on agricultural growth in Nigeria (1979-2014). Review of Agricultural and Applied Economics. The Successor of the Acta Oeconomica et Informatica, ISSN 1336-9261, XXI (Number 1, 2018): 40-54 doi: 10.15414/raae/2018.21.01.40-54.
  43. PEJOUT, N. (2010). Agriculture policy in Africa-renewal or status quo? A spotlight on Kenya and Senegal. The political economy of Africa. V. Padayachee, London, Abingdon: 247-265.
  44. PHILIP, D. (1995). Corporate tax incentives and economic growth in Nigeria. Nigeria Tax News; 2(1) April; pp 163.
  45. POULTON, C., EDWARD, A. & KYDD, J. (2005). The Future of small farmers: New direction for services, institutions and intermediations. In proceedings of research workshop on the future of small farms, Wye, UK. Organized by International Food policy Research Institute (ODI), Imperial College, London.
  46. SWINNEN, J. (1996). Endogenous price and trade policy developments in central European Agriculture. Euro Rev. Agric. Econ. 23(2), 133-166.
  47. SWINNEN, J. F. M. &. VAN DER ZEE, F. A. (1993). The political economy of agricultural policies: A survey. European Review of Agricultural Economics, 20, 261-290.
  48. THIES, C.G., & PORCHE S. (2007), “The Political Economy of Agricultural Protection”, Journal of Politics 69(1),116-127.
  49. TIMMER, C.P. (1980). Food prices and food policy analysis in LDCs. Food Policy, 5, 188-199.
  50. VAN DE WALLE, N. (1999). African economies and the politics of permanent crisis, 1979 Cambridge: Cambridge University Press, 2001.
  51. VIRENDER, G. (1993). The political economy of international Agricultural Protection. Retrospective Theses and Dissertations, Iowa State University.
  52. VON MOLTKE, A., MCKEE, C. & MORGAN, T. (2004). Energy Subsidies: Lessons Learned in assessing their impact and designing policy reforms. Sheffield: Greenleaf Publishing.
  53. ZIETZ, J. & VALDES, A. (1993). Growth of agricultural protection, trade and protectionism. NBER-EASE Volume 2, University of Chicago Pres ISBN: 0-226-38668-6. Accessed 25/03/2017 from URL: http://www.nber.org/chapters/c8073.