Africano AP., Magalhaes M., 2005, FDI and Trade in Portugal: A gravity analysis, Universidade do Porto, FEP Working Paper, no. 174.

Anfofum A.A., Gambo J.S., Suleiman T., 2013, Estimating the impact of foreign direct investment in Nigeria, International Journal of Humanities and Social Science, no. 17.

Blomstrom M., Kokko A., Golberman S., 1998, Regional economic integration and FDI: The North American experience, Economic Research Institute, Stockholm School of Economics, Stockholm, Sweden., Working Paper Series in Economics and Finance, no. 269.

Blonigen B.A., 1997, Firm-specific assets and the link between exchange rates and foreign direct investment, American Economic Review, no. 3.

Brainard S.L., 1993, An empirical assessment of the factor proportions explanation of multinational sales, NBER Working paper no. 4583.

Buckley P., Casson P., 1976, The future of the multinational enterprise, MacMillan, London.

Caves R.E., 1974, Economic analysis and multinational enterprise, Allen & Unwin, London.

Chiappini R., 2016, Do overseas investments create or replace trade? New insights from a macrosectoral study on Japan, The Journal of International Trade & Economic Development, no. 3.

Clausing K.A., 2000, Does multinational activity displace trade, Economic Inquiry, no. 2.

Cohen B., 1975, Multinational firms and Asian exports, Yale University Press, London.

Daramola A., Ehui S., Ukeje E., McIntire J., 2008, Agricultural export potential in Nigeria, [in:] Economic policy options for a prosperous Nigeria, eds. P. Collier, C.C. Soludo, C.A. Pattillo, Palgrave Macmillan, New York, NY.

Dunning J.H., 1974, The distinctive nature of the multinational enterprise, [in:] Economic analysis and the multinational enterprise, ed. J.H. Dunning, Allen & Unwin, London.

Dunning J.H., 1977, Trade, location of economic activity and the multinational enterprise: A search for an eclectic approach, [in:] The international allocation of economic activity: Proceedings of a Nobel symposium; Stockholm, 8–11 June, 1976, eds. B. Ohlin, P.-O. Hesselborn, P.M. Wijkman, Macmillan, London.

Dunning J.H., 1980, Toward an eclectic theory of international production: Some empirical tests, Journal of International Business Studies, no. 1.

Fregene P., 1998, Oil exploration and production activities: The socio-economic and environmental problems in Warri division – Itsekiri homeland, [in:] Oil exploration and exploitation: The state and crises in Nigeria’s oil bearing enclave, ed. F. Adewumi, Friedrich Ebert Foundation, Lagos.

Gerber J., 2014, International economics, Pearson, Harlow.

Helpman E., 1984, A simple theory of international trade with multinational corporations, The Journal of Political Economy, no. 3.

Hymer S.H., 1976, The international operations of national firms: A study of direct foreign investment, MIT Press, Cambridge, MA.

Ifeanyi N.N., Felix C., Remy O.M., Jude C.N., Nnanna M.A.M., Joe O., 2008, Empirical assessment of Nigeria’s agricultural export and economic welfare, MPRA Paper no. 12.

Kindleberger C.P., 1969, American business abroad, Yale University Press, New Haven, CT. Knickerbocker F.T., 1973, Oligopolistic reaction and multinational enterprise, Division of Research, Harvard University, Cambridge, MA.

Kojima K., 1975, International trade and foreign direct investment: Substitutes or complements, Hitotsubashi Journal of Economics, no. 16.

Kojima K., 1982, Macroeconomic versus international business approach to direct foreign investment, Hitotsubashi Journal of Economics, no 1.

Krugman P., Melitz M., Obstfeld M., 2012, International economics: Theory and policy, Pearson, Boston.

Lipsey R.E., Weiss M.Y., 1981, Foreign production and exports in manufacturing industries, Review of Economics and Statistics, no. 63.

Liu L.-G., Graham E.M., 1998, The relationship between trade and foreign investment: Empirical results for Taiwan and South Korea, Working Paper Series WP98-7, Peterson Institute for International Economics.

Markusen J.R., 1984, Multinational, multi-plant economies and the gains from trade, Journal of International Economics, no. 16.

Markusen J.R., 1995, The boundaries of multinational enterprises and the theory of international trade, Journal of Economic Perspectives, no. 2.

Markusen J.R., Venables A.J., 1998, Multinational firms and the new trade theory, Journal of In- ternational Economics, no. 2.

Markusen J.R., Venables A.J., 2000, The theory of endowment, intra-industry and multi-national trade, Journal of International Economics, no. 2.

Mundell R.A., 1957, International trade and factor mobility, The American Economic Review, no. 3.

Okechukwu O.G., De Vita G., Luo Y., 2018, The impact of FDI on Nigeria’s export performance: A sectoral analysis, Journal of Economic Studies, no. 5.

Ohlin B., 1933, Interregional and international trade, Harvard University Press, Cambridge, MA.

Pearce I., Rowen D.C., 1966, A framework for research into the real effects of international capital movements, [in:] Essays in honour of Marco Fanno, ed. T. Bagiott, 2 vols., Cedam, Padova.

Olise M.C., Anigbogu A.T., Okoli M.I., Anyanwu K.N., 2013, Domestic investment and foreign direct investment flows in Nigeria, IOSR Journal of Humanities and Social Science, no. 6.

Ozawa T., 1991, Japanese multinationals and 1992, [in:] Multinationals and Europe 1992, eds. B. Burgenmeier, J.L. Mucchielli, Routledge, London.

Pontes J.P., 2004, A theory of the relationship between foreign direct investment and trade, Economics Bulletin, no. 6.

Pugel T.A., 2009, International economics, McGraw-Hill, New York, NY.

Ricardo D., 1817, On the principles of political economy and taxation, John Murray, London.

Rugman A., Collinson S., Hodgetts R., 2006, International business, FT Prentice Hall, Harlow.

Salvatore D., 2012, Introduction to international economics, Wiley, Hoboken, NJ.

Smith A., 1776, An inquiry into the nature and causes of the wealth of nations, W. Strahan, T. Cadell, London.

Schmitz A., Helmberger P., 1970, Factor mobility and international trade: The case of complementarity, The American Economic Review, no. 4.

Turkan K., 2006, Foreign direct investment and intermediate goods exports: Evidence from USA, Paper presented on the ETSG 2006.

Vernon R., 1966, International investment and international trade in the product cycle, Quarterly Journal of Economics, no. 80.