تعدیل مدل قیمت‌گذاری دارایی‌های سرمایه‌ای مصرف بر اساس تابع ترجیحات مارشالی (مطالعه موردی ایران)

نویسندگان
اعظم محمدزاده 1
محمد نبی شهیکی تاش 1
رضا روشن 2
1 دانشگاه سیستان و بلوچستان
2 دانشگاه خلیج فارس بوشهر
10.18869/acadpub.jemr.7.25.7
چکیده
یکی از مدل‌های قیمت‌گذاری دارایی‌های سرمایه‌ای مدل CCAPM است که اولین بار توسط بریدن (1979) ارائه گردید. در مدل استاندارد و پایه CCAPM یک رابطه خطی بین بتای مصرف و مازاد بازده دارایی‌ها برقرار است ولی متأسفانه CCAPM خطی باعث ایجاد «معمای صرف سهام» شده است. پس از ارائه معماهایی همچون صرف سهام، تعدیلاتی در مدل CCAPM صورت پذیرفت. به همین منظور در این مقاله نیز تعدیلاتی در مدل پایه CCAPM صورت پذیرفته بطوری‌که به استخراج نوع جدیدی از ترجیحات برای قیمت‌گذاری دارایی‌های سرمایه‌ای پرداخته‌ شده است. این نوع ترجیحات اولین بار توسط مارشال ارائه شد که در آن تابع مطلوبیت نه تنها به مصرف بلکه به پس‌انداز نیز بستگی دارد. در این مقاله پس از مدل‌سازی ترجیحات بر اساس پس‌انداز به استخراج معادلات اویلر مربوطه پرداخته و با روش GMM پارامترها برآورد شده است. به منظور تخمین مدل‌های CCAPM و SCCAPM، داده‌های فصلی سال-های 1367 تا 1389 مورد بررسی قرار گرفته است. مدل‌های برآوردی معنادار بوده بعبارت دیگر می‌توان نتیجه گرفت متغیر مصرف و پس‌انداز در توضیح بازده سهام در دوره فوق موفق بوده‌اند. براساس مقادیر تخمینی در دو مدل می‌توان نتیجه گرفت که عامل تنزیل ذهنی زمان (β) عدد بزرگتر از 8/0 دارد و ترجیحات در تابع پس‌انداز معنادار است اما ضریب تاثیر گذاری بالایی ندارد. علاوه بر این نتایج حاکی از آن است که عاملان اقتصادی ریسک گزیر می باشند
کلیدواژه‌ها
قیمت‌گذاری دارایی‌های سرمایه‌ای
ترجیحات
پس‌انداز
قیمت‌گذاری دارایی‌های سرمایه ای بر اساس پس‌انداز

عنوان مقاله English

Adjusted Consumption Capital Asset Pricing Model, According to the Marshall Preferences (Case Study: Iran)

نویسندگان English

Azam Mohammadzadeh 1
mohammad nabi shahyaki tash 1
reza roshan 2
1 univercity of sistan & baluchestan
2 university of khalij fars
چکیده English

One of the capital asset pricing models is CCAPM model that first time were presented by Breeden (1979). In the standard and the basic CCAPM establishes a linear relationship between consumption’s beta and excess return on assets but unfortunately, linear CCAPM made The Equity Premium Puzzle. After presenting puzzles like equity premium puzzle, adjustments were made in the CCAPM. For this purpose in this paper, adjustments have been made in the preferences as explores the implications of a novel class of preferences for the behavior of asset prices. This class of preferences was suggested first time by Marshall (1920), that according to it, people derive utility not only from consumption, but also from the very act of saving.

In this paper, we derive the Euler equations after modeling preferences based on the savings and consumption estimate them with GMM. In order to estimate the models, is examined quarterly data of 1977 to 2010. The models are significant in the other words it can be concluded that consumption and saving are successful in explaining stocks returns. Based on the estimated parameters in the models we can conclude that β is greater than 0.8 and savings is significant in preferences function but don’t have high value. In addition, these results indicate that economic agents are risk averse.

کلیدواژه‌ها English

Capital Asset Pricing
Preferences
Saving
Saving-Based Asset-Pricing
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