Analysis of Household Expenditure on Food in Iran by Age – Period – Cohort Model and Pooled Regression

Document Type : Research Paper


1 Associate Professor of Agricultural Economics, University of Tabriz

2 Ph.D. Candidate in Agricultural Economics, University of Tabriz


In recently years, demographic problems as the aging population and the reduction of households' size have been important issues in Iran. The study on the impact of demographic factors on food consumption is essential to establish policies on food security, social welfare, and agricultural marketing. From microeconomics perspective, the behavior study of generations is important, because historical events as well as preferences change over time may cause different behavior consumption of generations. From macroeconomics perspective, this study allows the examination of the life - cycle hypothesis. From marketing perspective, this study is important to recognize the behavior of food buyers. Therefore, this research tries to examine the impact of age structure, generational change and yearly shocks on food expenditures using Age-Period-Cohort (APC) analysis on pooled data of 323072 urban households' and 312358 rural households'. The results of this research show the increase of age lead to reduce food demand; food consumption for younger generations is less than older generations, and finally period shocks influence food expenditure.


Main Subjects

  1. Attanasio, O. (1998). Cohort analysis of saving behavior by US households. Journ al of Human Resources, 33(3), 575-609.
  2. Baltagi, B. H. (2005). Econometric analysis of panel data. Third Edition, Wiley Publisher.
  3. Blisard, N. (2001). Income and food expenditures decomposed by Cohort, age, and time effects. USDA.
  4. Deaton, A. (1985). Panel data from times series of cross-sections. Journal of Econometrics, 30, 109-126.
  5. Deaton, A. (1997). The analysis of household surveys: A microeconometric approach to development policy. Baltimore, MD: Johns Hopkins University Press.
  6. Deaton, A., & Paxson, C. (1994). Intertemporal choice and inequality. The Journal of Political Economy, 102(3), 437-467.
  7. Dornbusch, R., & Fischer, S. (2005). Macroeconomics (6th Edition). McGraw-Hill.
  8. Ghazi Tabataaei, M., Omidvar, N., & Aghayari Tavakol., (2009). The study of the impacts of age – period – generation effects on per capita consumption of fat: Crossed - linear multi-level model. Journal of Population Association of Iran, 3(6), 5-34. (In Persian).
  9. Gustavsen, G. W., & Rickertsen, K. (2014). Consumer cohorts and purchases of nonalcoholic beverages. Empirical Economics, 46(2), 427-449.
  10. Kotler, F., and Armstrong Gary, (2009). The principle of marketing. Translated by Mehdi Zare, Modir Farda Publications, Tehran. (In Persian).
  11.  McKenzie, D. J. (2004). Asymptotic theory for heterogeneous dynamic Pseudo-panels. Journal of Econometrics, 120: 235–262.
  12. Mori, H., & Saegusa, Y. (2010). Cohort effects in food consumption: What they are and how they are formed. Evolutionary and Institutional Economics Review, 7(1), 43-63.
  13. Mori, H., & Saegusa, Y. (2015). At-home rice consumption in Japan socio-demographic analyses. Senshu University Economic Bulletin, 50(2), 49-87.
  14. Mori, H., Clason, D. L., & Lillywhite, J. M. (2006). Estimating price and income elasticities in the presence of age cohort effects. Agribusiness, 22(2), 201-217.
  15. Mori, H., Saegusa, Y., & Tanaka, M. (2015). Augmented Cohort analysis―A practical way to predict future at-home consumption of selected food products. Economic Bulletin of Senshu University, 49(3), 111-135.
  16. Mousavi, M., & Azari Bani, B. (2011). The generation study on consumption expenditures pattern of young people in Iran. Quarterly Journal of Quantitative Economics, 9(4), 91-110. (In Persian).
  17. Parker, J. A. (1999). Spendthrift in America? On two decades of decline in the US saving rate. In NBER Macroeconomics Annual, ed. R.J. Bernanke, 14.
  18. Paxson, C. (1996). Saving and growth: Evidence from micro mata. European Economic Review, 40(2), 255-88.
  19. Raghfar, h., & Babapour, M. (2014). The intergenerational analysis of urban household expenditure by using the pseudo panel. Quarterly Journal of Applied Economics Studies in Iran (AESI), 3(10), 177-199. (In Persian).
  20. Rezaei Ghahroudi, Z., Mostafavi, N., & Eftekhari, S. (2013). Pattern of consumption in the life cycle of urban households. Social Welfare Quarterly, 13 (49), 243-298. (In Persian).
  21. Salehi-Isfahani, D., & Marku, M. (2010). Reversal of fortunes: The rise and fall of life time earnings of Iranian men. Economic Development and Cultural Chang, 59(4), 877-906.
  22.  Samaei, K. (2011). The study of generation behavior of savings. Master's Thesis, Sharif university of Technology (in Persian).
  23. Stewart, H., & Blisard, N. (2008). Are younger cohorts demanding less fresh vegetables? Applied Economic Perspectives and Policy, 30(1), 43-60.
  24. The Statistical Center of Iran. (2016). The statistical data of households' income and expenditure (In Persian).
  25.  Zan, H. U. A., & Fan, J. X. (2010). Cohort effects of household expenditures on food away from home. Journal of Consumer Affairs, 44(1), 213-233.