1 Department of Agricultural Economics and Extension Federal University of Oye-Ekiti, Nigeria

2 Department of Agricultural Economics University of Nigeria, Nsukka


This study examined the effects of trade liberalization and exchange rate changes on carbohydrate staples in Nigeria. Secondary data published from 1974 to 2006 on cassava exports and rice imports as well as non-tradable carbohydrate staples were used. It was hypothesized that exchange rate changes and trade liberalization via price relatives, trade intensity and nominal protection coefficient have affected prices of carbohydrate staples in Nigeria. Results show that the effects of trade liberalization on prices of non-tradable carbohydrate staples were mixed. Trade liberalization accounted for most changes in the price of non-tradable rice than other crops. World prices positively affected the prices of maize and non-tradable rice. Also increasing exchange rate will lead to increase in price of non-tradable rice due to price competition with imported rice. The intensification of liberalization exercise from the removal of quantitative restriction to use of tariff, among other recommendations, should be encouraged because it can be a remedy to the negative impact of increase in the trade intensity and erosion of nominal protection coefficient on prices of the non-tradable crops.


1- Achike, A.I. (2004). Macro-economic Picture of Nigerian Agriculture: Strategic Analysis of Development  Constraints and Priorities in Southern Nigeria. Updates on Agriculture and conflict July, USAID Mission Abuja Pp. 3-14
2- Achike, A.I., Agu, C., & Oduh, M. (2005). Impact of Common External Tariff and Economic Partnership Agreements on Agriculture in Nigeria.Technical Report submitted to OXFAM GB.
3- Adubi, A.A., & Okunmadewa, F. (1999). Price,Exchange Rate Volatility and Nigeria's AgriculturalTrade Flows. A Dynamic Analysis. AERC ResearchPaper 87, Nairobi, Kenya.
4- Arene, C.J. (2000). Exchange Rate Policies andthe Production of Major Cash Crops in Nigeria.Modeling, Measurement and Control, 22 (3): 25-36.
5- Arene, C.J., & Okafor, A.O. (2000). ExchangeRate Liberalization as a Policy Instrument for StimulatingNon-Traditional Agricultural Exports in NigeriaEconomic Affairs. 46(4): 234-247.
6- Arene, C.J., & Odusolu, G.O. (1998). Exchange RateReform as a Policy Instrument for Stimulating SmallholderAgricultural Investment Demand and OutputSupply in Nigeria Economic Affairs. 43(4): 232-240
7- Arene, C.J., & Mkpado, M. (2004). Counter Urbanizationand Agricultural Production in Nigeria Journalof Rural Development. 23(1): 73-81.
8- Asuming-Brempong, S. (1994). Effects of ExchangeRate Liberalization and Input Subsidy Removalon the Competitiveness of Cereals in GhanaIssues in African Rural Development. 2, Pp. 43-59.
9- Ayichi, D. (1997). An Econometric Study of ExportSupply Responses of Major Nigerian AgriculturalCommodities to Price and Exchange RateRegimes Ph.D. Thesis, Department of AgriculturalEconomics, University of Nigeria, Nsukka.
10- Chidebelu, S.A.N.D., Ayichi, D., & Okoye, C.U.(1998). The Impact of Price and Exchange RateFluctuations on Volume of Agricultural Export Commodities.The Case of Natural Rubber, 1970-1990.Ibadan. NISER/SSCN National Research in Nigeria.
11- Collier, P., Greenaway, D., & Gunning, J.W.(1999). Trade liberalization: A MethodologicalFramework in Oyejide A. et al., (eds) Regional integrationand trade liberalization in Sub SaharanAfrica Vol. 1 Macmillan Press Ltd London
12- ESCB (2000). International Trade in CassavaProducts An African Perspective Basic Food StuffsService (ESCB) of the F.A.O. Commodity Trade DivisionReport September
13- Falusi, A.O. (2005). Macro-Economic Reformsand Agricultural Development in Nigeria: A PreliminaryAssessment. Keynote Paper of 19th AnnualFarm Management Association of Nigeria ConferenceProceedings Pp. 2-16.
14- FAO (2004). Food and Agriculture OrganizationYear Book.
15- FAO (2005). Production Year Book FAO Rome
16- FAO (2006). Roots. Tubers, Plantains and Bananasin human Nutrition 2005-2006. FAOcorporateDocument Repository Retrived from
17- FAO (2006). Commodity Market Review2005- 2006. FAOCorporate Document RepositoryRetrived from
18- FAOSTAT (2005). Output of cassava. Retrivedfrom
19- FAOSTAT (2010) Output of cassava. Retrievedfrom
20- FGN (2004). Federal Republic of Nigeria "2005Appropriation Bill Speech Vanguard. Pp, 14-16www. Vanguard Media Ltd.
21- FOS (2004). Federal Office of Statistics AnnualAbstract of Statistics, Abuja, Nigeria.
22- FOS 1990-2006. Nigerian Foreign Trade SummaryFederal Office of Statistics /National Bureauof Statistics Abuja
23- Ihimodu, I.I. (1993). The Structural AdjustmentProgramme and Nigeria's Agricultural Development.Monograph Series No 2 National Center for EconomicManagement and Administration, Ibadan, Nigeria.
24- Johansen, S. (1992). Testing Weak Exogeneityand Order of Cointegration in UK Money DemandJournal of Policy Modeling. 14, 313 – 334.
25- Johansen, S., & Juselius, K. (1992). Testingstructural analysis of co integration vectors. Journalof Economic Dynamics and Control, 12, 231 – 54. [DOI via Crossref]   
26- Kidane, A. (1999). Real Exchange Rate Priceand Agricultural Supply in Ethiopia: The Case ofPerennial Crops. AERC Research Paper 99.
27- Kwanashie, M., Ajilima, I., & Garub, A. (1998).The Nigerian Economy: Response of Agriculture toAdjustment Policies. AERC Research Paper 78.
28- Kwanashie, M., Garbu, A., & Ajilima, I. (1997).Policy Modeling in Agriculture: Testing the Responseof Agriculture to Adjustment Policies inNigeria. AERC Research Paper 57.
29- Mwase, N. (1998). Economic Liberalization andPrivatization of Agricultural Marketing and InputSupply in Tanzania: A Case Study of Cashew Nuts.AERC Research Paper 86
30- NBS 2000-2004. National Bureau of Statistics,Annual Report Various Issues, Abuja, Nigeria.
31- NEPZA (2006). Nigerian Export Processing ZoneAuthority: Free Trade News, 2nd Edition, Vol. 2, P. 4
32- Nigerian Customs, Excise Consolidation DecreesVarious Issues Abuja Nigeria.
33- Nwosu, A.C. (1992). Structural Adjustment andNigerian Agriculture: An initial Assessment StaffReport No AGES 9224. Economic Research serviceUSDA, Washington, D.C.
34- Ogundele, O.O., & Okoruwa, O.V. (2006). TechnicalEfficiency Differentials in Rice ProductionTechnologies in Nigeria. AERC Research paper 154.
35- Ogunkola E.O., Bankole, A.S., & Adewuyi, A.O.(2005). An Evaluation of the Impact of Trade and InvestmentPolicy Reform in Nigeria" A Final Reportsubmitted to AERC Nairobi Kenya
36- Okoli, E.N., & Okoye, C.U. (2005). Analysis ofFactors Influencing Cassava Exports in Nigeria Proceeding,of 19th Annual Farm Management Associationof Nigerians Conference Pp, 68-72
37- Olusegun, A.J. (2006). Dynamic acreage responseof selected individual crops to price risk inNigeria 13 (2):81-104
38- Osuntogun, A.C., Edordu, C., & Oramah, B.O.(1993). Promoting Nigerian Non-oil Export: Analysisof some Strategic Issues Final Report. AERC,Nairobi, Kenya.
39- Oyejide, T. A. (1986). Effects of Trade and ExchangeRate Policies on Agriculture in Nigeria ResearchReport No 55. Washington D.C., InternationalFood Policy Research Institute.
40- Phillip, D.O.A (1996). Responsiveness of selectedAgricultural Export Commodities to ExchangeRate Devaluation in Nigeria: An Econometric AnalysisEconomic and Financial Review, 34, No. 2.
41- Reinika, R. (1994). How to Identify Trade LiberalizationEpisodes. An Empirical Study on KenyaCSAE Working Paper
42- Soludo, C.C. (1995). An Evaluation of StructuralAdjustment Programmes in Africa: Issues, Methodsand Consequences for Nigeria in Contemporary Issuesin Social Sciences edited by J.I. Onuoha and J.O. C. Ozioko, Acena Publishers AP, Pages 59 – 103.
43- The Guardian (2007). Nigeria's Agricultural ExportJumps to $111.2 Million in the First Quarter.The Guardian News Paper Tuesday July 9 P. 21
44- Tshibaka, T. B. (1986). The Effects of Trade andExchange Rate Policies on Agriculture in Zaire; ResearchReport 56, Washington D.C., InternationalFood Policy Research Institute.
45- Tunji, A. (2001). An Overview of the NigerianRice Economy The Nigerian Institute of Social andEconomic Research (NISER), P.M.B. 5, UniversityPost Office. Ibadan– Nigeria Retrived from