Estimation of Almost Ideal Demand System on Major Food Items In Erbil In Year 2012

  • Sabr Perdawd Othman College of Management and Economics / Salahaddin University-Erbil
  • Aveen Abdulqahar AbdalMajeed College of Management and Economics / Salahaddin University-Erbil
Keywords: Estimation, Ideal Demand System (AIDS), OLS


  The current study is based on the estimation of a standard model to determine the quantitative relationship between expenditure on major food a dependent variable with explanatory variables that affecting it with an emphasis on the impact of price and income. To achieve this goal Almost Ideal Demand System (AIDS) was used to estimate demand functions for seven major food items in Erbil governorate for the year (2012), which accounts for about (%95) of food expenditure depending on household survey data by using the method (OLS). The elasticities of expenditure, self-price and cross-price were derived for studied food items. Generally, according to theoretical, statistical and standard criteria, the result of the study are satisfactory, where the size and signal of the elasticities derived from the estimated standard models coincided with the hypotheses of the study and with the concepts of economic theory.  This study has concluded with a number of conclusions and recommendations based on estimated model estimation results.


1- الجهاز المركزي للإحصاء, بيانات الأنفاق على الغذاء, وزارة التخطيط.
2-السيفو، وليد اسماعيل وآخرون (2006)،أساسيات الاقتصاد القياسي التحليلي:نظرية الأقتصاد القياسي والاختبارات القياسية من الدرجة الأولى، الطبعة الأولى، الأهلية للنشر والتوزيع، عمان.
3-محبوب ، عادل عبدالغني ، (1998) ، أصول الاقتصاد القياسي – النظرية والتطبيق ، شركة الاعتدال للطباعة الفنية المحدودة ، بغداد.
-4عبدالمجيد, ئةظين عبدالقهار, تقدير نموذج الطلب شبه الامثل لبعض البنود الغذائية الرئيسة في محافظة اربيل لعام 2012, رسالة ماجستير في العلوم الاقتصادية, كلية الادارة والاقتصاد, جامعة صلاح الدين, 2015.
ثانياً: باللغة الانكليزية
1- Agbola, Frank W. , Maitra Pushkar ,and McLaren ,Keith ,(2002), The Analysis of Consumer Demand for Food in South Africa using An Almost Ideal Demand System: Some Preliminary Results, Paper presented at the 46th Annual Conference of Australian Agricultural and Resource Economics Society, 13-15 February 2002, Canberra, Australia,13 pages.
2- Ahmed, Akhter U. and Shams ,Yawar.,(1993), Demand Parameters in Rural Bangladesh, International Food Policy Research Institute Bangladesh Food Policy Project, Dhaka,16 pages.
3- Alderman, Harold.,(1986), The Effect of Income and Food Price Changes on the Acquisition of Food by Low-Income Households. Report submitted to the Agency for International Development, Office of Nutrition. Washington DC: International Food Policy Research Institute, Oct. 1984
4-Asano, S., and Jie Jing Wang, (2008)."Age, Cohort, and Wave effects in Japanese Household Consumption". Preliminary Draft (not to be quoted)
5- Barnett, William A. and Seck, Ousmane.,(2006), Rotterdam vs Almost Ideal Models: Will the Best Demand Specification Please Stand Up?,Munich Personal RePEc Archive(MPRA ),Paper No. 417. Online at :
6- Barslund, Mikkel,(2011), Censored Demand System Estimation with Endogenous Expenditures in Clustered Samples: an Application to Food Demand in Urban Mozambique, LICOS Centre for Institutions and Economic Performance, University of Leuven (KUL), Discussion Paper 280/2011.,36 pages.
7- Barten, A. P. (1964), Family Composition, Prices and Expenditures Patterns, in Peter, E. Hart, Gordon Mills, and John Whitaker, eds. ‘Econometric Analysis for National Planning’, London, Butterworths.
8-Bopape ,Lesiba .,and Myers, Robert .,(2007), Analysis of Household Demand for Food in South Africa: Model Selection, Expenditure Endogeneity, and the Influence of Socio-Demographic Effects, Selected paper prepared for presentation at the African Econometrics Society Annual Conference, Cape Town, South Africa, July 4-6, 2007.,21 pages.
9-Blanciforti ,Laura and Green, Richard ., (1983)," An Almost Ideal Demand System Incorporating Habits: An Analysis of Expenditures on Food and Aggregate Commodity Groups", The Review of Economics and Statistics, Vol. 65, No. 3., pp. 511-515.
10- Brooks, Chris, (2005), "Introductory Econometrics for Finance", Cambridge Unevercity Press, New York.
11- Buse, Adolf . (Nov., 1994), "Evaluating the Linearized Almost Ideal Demand System". American Journal of Agricultural Economics, Vol. 76, No. 4., pp. 781-793.
12- Chern, Wen S.,et al., (2002), "Analysis of Food Consumption Behavior By Japanese Households ", 81 pages .
13- Cox, T.L., and M.K. Wohlgenant." Pricesa nd Quality Effects in Cross-Sectional Demand Analysis". Amer. J. Agr. Econ. 68(November 1986):908-19.
14- Deaton, A. and Paxson, C. (1998), Economies of scale, household size and demand for food, in ‘The Journal of Political Economy’, vol. 106, n. 5, pp. 897-930.
15- Deaton, A. and J. Muellbauer, (1980), "An Almost Ideal Demand System", The American Economic Review, Vol. 70, No. 3. pp. 312-326.
16- Deardorffs, , Alan V.,(2010), "Deardorffs' Glossary of International Economics".
17- De Menezes, T. A., Bernardo Campolina, Fernando Gaiger Silveira, Luciana Mendes Santos Servo and Sérgio Francisco Piola. (2006). " Family Health Expenditure and Demand: An Analysis Based on The Consumer Expenditure Survey -POF- 2002/2003 ". Well-Being and Social Policy Vol 2, Num. 1, pp. 25-46.
18- Fabiosa ,Jacinto F. and Soliman, Ibrahim .,( August 2008),"Egypt’s Household Expenditure Pattern:Does It Alleviate a Food Crisis?", Center for Agricultural and Rural Development(CARD),Iowa State University Working Paper 08-WP 475. (internet).
19- Fujii, et al., James. (May, 1985), " An Almost Ideal Demand System for Visitor Expenditures", Journal of Transport Economics and Policy, Vol. 19, No. 2 , pp. 161-171.
20-Gibson ,John. and Rozelle ,Scott. , (2006), "Evaluating the Use of Unit Values and Community Prices in Demand and Food Policy Analysis", (14/10/2013)
21- Goldberger, Arthur S. ,(1991), "A Course in Econometrics", Harvard University Press, Cambridge, Massachusetts. Cited in (Gujaratti.2009,p123-124)
22- Green ,Richard, and Alston, Julian M. ,(1990), "Elasticities in AIDS Models" American Journal of Agricultural Economics, Vol. 72, No. 2. (May, 1990), pp. 442-445.
23-Greene, William.H,(2003),Econometric Analysis,5th ed.,Pearson Education, Inc., Upper Saddle River,New Jersey
24-Greene,William H.(2008),"Econometric Analysis", 6th ed.,Pearson Prentice -Hall,New Jersey
25- Gujarati, Damodar,(2003), "Basic Econometrics" 4th ed., McGraw-Hill companies, Inc., New York.
26- Gujaratti, Damodar,(2009),"Basic Econometrics"5th ed., McGraw-Hill companies, Inc., New York.
27- Gujarati,Damodar,(2011),"Econometrics By Example", Palgrave Macmillan, UK, Houndmills.
28- Hansen, Bruce E.,(2011), “Econometrics”, University of Wisconsin.
29-Henderson, James .M. & Quandt, Richard .E. (1980)."Microeconomics Theory-A Mathematical Approach".3rd. McGraw-Hill, Inc.
30- Huq, A.S.M. Anwarul and Arshad, F.M.,(2010), "Demand Elasticities for Different Food Items In Bangladesh", Journal of Applied Sciences ,Vol:10 ,No:20,pp:2369-2378.
31- Jiupanyarach, W., (2011)."Estimation of Demand System in an AIDS Model: The Opportunity for Exporting Thai Agricultural Products". European Journal of Business and Economics, Volume 5.
32- Koç , A. Ali ., and Tan, Sibel .,(2001), "The Demand of Dairy Products in Turkey: The Impact of Household Composition on Consumption", METU Studies in Development, Vol 28, No 1,pp: 169-181.,d.d2k
33- Kunst, Robert M. ,(2011), "Introductory Econometrics, University of Vienna and Institute for Advanced Studies", Vienna, .
34- Maddala, G.S., (2001), ”Introduction to Econometrics”, 3rd ed., John wily & Sons, Ltd., Chichester, England.
35- Mittal, Surabhi, (August 2006) " Structural Shift in Demand for Food: Projections for 2020", Indian Council for Reserch on International Economic Relations (ICRIER), Working Paper No. 184 August 2006. (internet).
36- Mittal, S. ,(2010)." Application of The QUAIDS Model to The Food Sector in India". Journal of Quantitative Economics, Vol. 8 No.1,pp.43-54 .
37- Muellbauer, J., (1976). "Community Preferences and the Representative Consumer", Econometrica, 44(5):979-999.
38-Nicholson ,Walter , and Snyder ,Christopher , ( 2008),MICROECONOMIC THEORY : BASIC PRINCIPLES AND EXTENSIONS,TENTH EDITION, Thomson South-Western USA, Mason .
39- Odhiambo, Walter., Nyangito, Hezron O.,and Nzuma, Jonathan.,(2004)," Sources and Determinants of Agricultural Growth and Productivity in Kenya", Kenya Institute for Public Policy Research and Analysis (KIPPRA), Discussion Paper No. 34,pp:1-68.
40-Philips,Louis,(1974),"Applied Consumption Analysis",North-Holand Publishing Company,Amsterdam.Oxford.
41- Quantitative Micro Software LLC ,( April 2,2010), EViews 7 User’s Guide II,USA, web:
42- REGORŠEK, Darja., et al.,(2006), "Demand for the main food commodities in Slovenia", Published 2006 in the Jahrbuch der Österreichischen Gesellschaft für Agrarökonomie, Vol. 15, pp. 11-21. Available
43- Seale ,James Jr., Regmi, Anita , and Bernstein ,Jason,( October 2003) "International Evidence on Food Consumption Patterns", United States Department of Agriculture (USDA), Technical bulletin Number 1904.(internet)
44- Studenmund, A. H. (2006), "Using Econometrics: A practical Guide". 5th ed., Pearson International Edition, Addison Wesley Longman, Inc.
45-Tash , Dr Mohammad Nabi Shahiki , Shahraki Dr Javad ,and Jangi ,Samane Nouri .,(2012), "Estimating the Almost Ideal Demand System Model for Rural Households in Iran", International Journal of Academic Research Business and Social Sciences , Vol. 2, No. 8,pp:344-355.
46- Tasciotti, Luca., (2007), "Expenditure Pattern in Italy, 1875-1960".A Complete Quadratic Demand System Estimation with Demographic Variables.
47- Tomek, William G. and Robinson, Kenneth L.,(1972)"Agricultural Product Prices" Cornel University Press, Ithaca and London.
48- UL HAQ, Zahoor. Et al.,,(2009), "An Empirical Study of Food Demand in The North West Frontier Province, Pakistan", Sarhad J. Agric. Vol.25, No.4, pp:601-606.
49- Varian, R. Hal., (2011). "Microeconomic Analysis".3rd Edition. New York: W.W. Northon & Company.
50-Watson , Patrick K. , and Teelucksingh , Sonja S. ,(2002), "A practical introduction to econometric methods: classical and modern", The University of the West Indies Press, Barbados .
51-Working, H. (1943)."Statistical Laws of Family Expenditure."Journal of the American Statistical Association 33, 43-56.
52-Wooldridge, Jeffery M.,(2013),"Inroductory Econometrics: A modern Approach",4th ed., South-Western, Cengage Learning ,Mason, USA.
53-Zheng ,Zhihao .,(2008), "Food Demand in Urban China", Dessertation Submitted to the Faculty of the Graduate College of the Oklahoma State University In partial fulfillment of The requirements for The Degree of Doctor of Philosophy.
How to Cite
Othman S, AbdalMajeed A. Estimation of Almost Ideal Demand System on Major Food Items In Erbil In Year 2012. JAHS [Internet]. 27Dec.2018 [cited 10Jul.2020];22(6):63 -84. Available from: