بررسی تئوری تعمیم‌یافته کالای مرکب و تخمین تابع تقاضا انواع گوشت برای خانوارهای شهری ایران

نوع مقاله : مقاله پژوهشی

نویسندگان

• محمد رضوانی ¹
• حمید امیرنژاد ²
• یدالله بستان ³

¹ دانشجوی دکتری، گروه اقتصاد کشاورزی، دانشگاه تهران

² استاد گروه اقتصاد کشاورزی، دانشگاه علوم کشاورزی و منابع طبیعی ساری

³ دانشجوی دکتری، گروه اقتصاد کشاورزی، دانشگاه علوم کشاورزی و منابع طبیعی ساری

10.30495/jae.2024.30531.2345

چکیده

مقدمه و هدف: استفاده از داده‌های تجمیع‌شده و بررسی گروه‌بندی کالاهای مختلف برای بررسی رفتار مصرف‌کنندگان حائز اهمیت است. هدف مطالعه حاضر بررسی امکان تجمیع و برآورد تابع تقاضای جمعی برای گروه کالایی انواع گوشت (گوشت گوسفند، گوشت گوساله، مرغ، کنسرو ماهی، ماهی جنوب و ماهی شمال) است.
مواد و روش‌ها: از روش‌های تفکیک‌پذیری ضعیف، کالای مرکب تعمیم‌یافته و تابع تقاضای خانوارهای شهری ایران استفاده شد. داده‌ها و اطلاعات لازم از آمار سالانه هزینه و درآمد خانوارهای ایرانی سازمان آمار برای بازه زمانی 1398-1383 بدست آمد.
یافته‌ها: نتایج حاصل از کشش درآمدی نشان داد که دو کالای کنسرو ماهی و ماهی جنوب برای خانوارهای شهری ایران لوکس محسوب می‌شوند. ماهی شمال با کشش خودقیمتی 28/1- بیشترین حساسیت را نسبت به تغییرات قیمت در مقابل دیگر انواع گوشت دارد. همچنین براساس کشش متقاطع کنسرو ماهی و ماهی جنوب جانشین یکدیگر می‌باشند. بنابر نتایج آزمون تفکیک‌پذیری برای انواع گوشت، می‌توان انواع گوشت را به دو گروه گوشت قرمز و سفید تفکیک کرد. همچنین برای بررسی شرایط استقلال یا عدم استقلال شاخص قیمت نسبی و لگاریتم شاخص قیمت گروه، از آزمون‌های ایستایی و هم انباشتگی استفاده شد. نتایج نشان داد دو کالای کنسرو ماهی و ماهی شمال را می‌توان در گروه گوشت سفید قرار داد.
بحث و نتیجه‌گیری: نتایج نشان‌دهنده آن است که عدم توجه به تئوری تعمیم‌یافته کالای مرکب می‌تواند باعث گروه‌بندی نامناسب از کالاها شود. با توجه به نتایج مطالعه حاضر، توجه به روش مناسب برای گروه‌بندی انواع گوشت در جهت تحلیل و سیاست‌گذاری صحیح الگوی مصرفی مواد غذایی حائز اهمیت است

کلیدواژه‌ها

• تجمیع‌سازی
• تفکیک‌پذیری ضعیف
• سیستم تقاضای تفاضلی
• GODDS
• GCCT

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عنوان مقاله [English]

Investigation of generalized composite commodity theory and estimation of demand function of meat types for urban households in Iran

نویسندگان [English]

• Mohammd Rezvani ¹
• Hamid Amirnejad ²
• Yadollah Bostan ³

¹ 1. Ph.D. Student, Department of Agricultural Economics, University of Tehran

² Professor, Department of Agricultural Economics, Sari Agricultural Sciences and Natural Resources University, Sari, Mazandaran, Iran

³ Ph.D. Student, Department of Agricultural Economics, Sari Agricultural Sciences and Natural Resources University

چکیده [English]

The aim of the present study was to investigate the possibility of aggregating and estimating the collective demand function for meat commodity groups (mutton, beef, poultry, canned fish, southern fish and northern fish) using Weak Separability methods, generalized composite commodity and the demand function of Iranian urban households. Necessary data and information were obtained from the annual statistics of expenses and income of Iranian households of the Statistics Organization for the period of 2005-2020. The results of income elasticity showed that two canned goods, fish and southern fish, are considered luxury for Iranian urban households. Northern fish with a self-price pull of -1.28 is most sensitive to price changes against other types of meat. Also, canned fish and southern fish are substituted based on the intersection of canned fish. According to the results of the Separability test for different types of meat, different types of meat can be divided into two groups of red and white meat.

کلیدواژه‌ها [English]

• Aggregation
• Differential Demand System
• GCCT
• GODDS
• Weak Separability

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