Effect of Income Inequality on Demand for Grain Import in Iran

Authors
Department of Agricultural Economics, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Islamic Republic of Iran.
Abstract
Among the food products, grains play an important role in the consumption patterns of people, especially in the developing countries. Since Iran's main source of public dietary energy comes directly from grains, investigating and identifying the determinants of import of these products can be an important step towards food security. Most experimental studies consider import of grains as only a function of relative prices and real income, whereas, income inequality is also a variable affecting the import of grains. The present study evaluates the effect of income inequality on the import of grains in Iran's economy during the years 1969-2009. For this purpose, the relationship of grain import with gross domestic production (GDP), grain production, real exchange rate, and income inequality was evaluated for Iran by using the Vector Error Correction Model (VECM). The results indicate that the relationship between income inequality and grain import is positive and its coefficient is +0.55%. This implies that 1% increase in income inequality increases grain import by 0.55%. Also, the effect of gross domestic production on grains import is positive and the real exchange rate and grains production variables have a negative and significant effect on grains import.

Keywords


1. Abedullah, A. Gh., Khokhar, Sh. B. and Hanif, S. 2005. Import Demand Function of Wheat and Future Trends. J. Agri. Social Sci., 1: 350-354.
2. Adam, A., Katsimi, M. and Moutos, T. 2008. Inequality and the Import Demand Function. CESIFO Working Paper No. 2196, Category 6: Monetary Policy and International Finance. Available at: https://ideas.repec.org/p/ces/ceswps/_2196.html
3. Afzal, M. 2007. Exchange Rate Response of Import Demand in Pakistan. Sarhad J. Agri., 23: 1181-1186.
4. Dickey, D. A. and Fuller, W. A. 1981. Likelihood Ratio Statistics for Autoregressive Time Series with a Unit Root. Econometrica, 49: 1057-1072.
5. Economic Research and Policy Department, Economic Time Series Database, Department of Central Bank of the Islamic Republic of Iran 2012, Available at: http://tsd.cbi.ir (in Persion).
6. Engle, R. F. and Granger, C. W. J. 1987. Co-integration and Error Correction: Representation, Estimation and Testing. Econometrica, 55: 251-276.
7. Goldstein, M. and Mohsins, Kh. 1985. Income and Price Effects in Foreign Trade. Int. Eco., 2: 1041-1105.
8. FAO. 2012. FAO Statistical Yearbook. Available at: http://faostat.fao.org/default.aspx.
9. Flam, H. and Helpman, E. 1987. Vertical Product Differentiation and North-South Trade, Amer. Eco. Rev., 77: 810-822.
10. Johansen, S. 1988. Statistical Analysis of Cointegration Vectors. J. Eco. Dynamic. Control., 12: 231-254.
11. Johansen, S. 1991. Estimation and Hypothesis Testing of Cointegration Vectors in Gaussian Vector Autoregressive Models,” Econometrica, 59: 1551–1580.
12. Hansen, P. R. and Johansen, S. 1998. Workbook on Cointegration..Oxford University Press, Oxford.
13. Katsimi, M. and Moutos, T. 2006. Inequality and the US Import Demand Function. CESIFO Working Paper No. 1827, Category 6: Monetary Policy and International Finance. Available at: https://ideas.repec.org/p/ces/ceswps/_1827.html
14. Katsimi, M. and Moutos, T. 2011. Inequality and the US Import Demand Function. J. of Int. Money Finance., 30: 492-506.
15. Magee, S. P. 1975. Prices, Income and Foreign Trade: A Survey of Recent Economic Studies. In “International Trade and Finance: Frontiers for Research”, (Ed.): Kenen, P. B.. Cambridge University Press, New York, PP. 175-252.
16. Maleki, B., Avetisyan, S., Permeh, Z. and Paseban, F. 2012. Factors Affecting Iran’s Animal Products Export: A Co-integration Analysis. J. Agri. Sci. Tech., 14: 1195-1203.
17. Mohammadi, T., Taghavi, M. and Bandidarian, A. 2011. The Effect of Exchange Rate Uncertainty on Import: TARCH Approach. Int. J. Management Business Res., 1: 211-220.
18. Su, X. Y., Wu, J. Y., Zhang, H. J., Li, Z. Q., Sun, X. H. and Deng, Y. 2012. Assessment of Grain Security in China by Using the AHP and DST Methods. J. Agri. Sci. Tech., 14: 715-726.
19. Tang, T. C. 2003. An Empirical Analysis of China’s Aggregate Import Demand Function. China Econ. Rev., 14: 142-163.
20. Uzunoz, M. and Akcay, Y. 2009. Factors Affecting the Import Demand of Wheat in Turkey. Bulgarian J. Agri. Sci., 15: 60-66.
21. Warner, D. and Kreinin, M. E. 1983. Determinants of International Trade Flows. Rev. Eco. Statistics, 65: 96-104.
22. Wongun, S. 2005. Import Demand Elasticities for Agricultural Products in Korea. National Assembly Budget Office, Available at: www.apeaweb.org/confer/sea06/papers/song.pdf‏.
23. Yazdani, S., Shahbazi, H., Haghsheno, M. and Sadat Barikani, S. H. 2008. Corn Import Demand Model in Iran; Political Factors Application. Amer-Eur. J. Agri. Environ. Sci., 4: 633-639.