نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکترای علوم اقتصادی، دانشکده مدیریت و اقتصاد، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران،
2 استاد گروه اقتصاد، دانشکده اقتصاد و علوم سیاسی، دانشگاه شهید بهشتی، تهران، ایران، (نویسنده مسئول)،
3 دانشیار گروه اقتصاد بازرگانی، دانشکده اقتصاد، دانشگاه علامه طباطبایی، تهران، ایران،
4 استادیار گروه اقتصاد، دانشکده اقتصاد و مدیریت، دانشگاه آزاد اسلامی، واحد تهران مرکز، تهران، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The primary objective of this research is to analyze the profitability gap and examine the structural duality between large and small banks in Iran's banking system using the quantile regression approach. The study utilizes data comprising 202 observations from 20 Iranian banks during the period 2011-2023, collected through library research method using annual bank reports and central bank statistics. The research methodology is based on quantile regression, which enables the examination of heterogeneous effects of independent variables at different levels of profitability distribution. This method, employing bootstrap techniques, provides robust estimates against outliers.
The findings reveal that the effects of variables influencing profitability are heterogeneous and asymmetric across different quantiles. Specifically, non-performing loans demonstrate a stronger impact in lower quantiles (low-profit banks) with a coefficient of -1.619, while liquidity growth shows a more significant effect in higher quantiles (high-profit banks) with a coefficient of 0.034. Bank size and market concentration variables also exhibit complex patterns throughout the profitability distribution. The results of symmetry and slope equality tests further confirm the existence of coefficient heterogeneity across the profitability distribution.
This research presents innovations in several aspects: first, the application of quantile regression approach to analyze profitability gaps; second, the simultaneous examination of internal banking and external macroeconomic variables; and third, the focus on a period characterized by economic uncertainty. The research results emphasize the necessity of implementing differentiated policies based on banks' profitability levels. For low-profit banks, non-performing loan management and credit risk control should be prioritized, while for high-profit banks, leveraging macroeconomic opportunities should be the focus of policy-making. This approach can significantly contribute to enhancing banking system efficiency and strengthening financial stability.
کلیدواژهها [English]
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