Simulation of Banking Loan Barriers to Industry: Insights from a System Dynamics Model

Subject Areas : Simulation

Mehdi Vosoughi ¹ , Bijan Nahavandi ² , Mahdi Homayounfar ³

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Received: 2025-10-08 Accepted : 2025-11-02 Published : 2025-11-02

Keywords: System dynamics, industrial financing, loan-granting barriers, scenario analysis, simulation,

Abstract :

Industrial financing is pivotal to economic development, yet it faces persistent barriers, including institutional rigidities, informational asymmetries, and macroeconomic volatility, which constrain credit flows and exacerbate underinvestment. This study applies system dynamics modeling to unravel these intricate interactions, constructing a validated framework that delineates causal interdependencies and projects policy outcomes over a 60-month horizon. A comprehensive literature review identified 54 categorized barriers, refined through expert consultations via purposive snowball sampling and causal loop diagramming. A Vensim PLE-based stock and flow model, incorporating six core stocks, was developed and rigorously validated for structural and behavioral accuracy to ensure empirical robustness. Scenario analyses contrasted a baseline with three policy interventions: credit facilitation with institutional reforms, regulatory tightening amid financial stress, and adaptive responses to external shocks (e.g., sanctions). Under the baseline, the system achieved natural equilibrium with gradual growth, moderate bank profitability, and constrained industrial capacity. The “Credit Facilitation and Institutional Improvement” scenario yielded optimal results, with enhanced repayment flexibility and refined credit assessment driving substantial loan growth, elevated profitability, and controlled default risk. Conversely, “Financial Pressure and Regulatory Tightening” induced severe credit contraction, rising non-performing loans, and diminished profitability, underscoring the perils of overly restrictive policies. The “External Shock and Adaptive Response” scenario triggered temporary declines in profitability and credit access, but endogenous mechanisms facilitated partial recovery. These findings affirm that facilitative and institutional policies maximize efficiency and sustainability for the banking and industrial sectors

References:

Adams, R. M., Brevoort, K. P., & Driscoll, J. C. (2023). Is lending distance really changing? Distance dynamics and loan composition in small business lending. Journal of Banking & Finance, 156, 107006.
Aguirregabiria, V., Clark, R., & Wang, H. (2024). The geographic flow of bank funding and access to credit: Branch networks, local synergies and competition. arXiv preprint arXiv:2407.03517.
Akinola, A. O., Efuntade, O. O., & Efuntade, A. O. (2020). Banks financing and industrial sector performance in Nigeria. International Journal of Accounting, Finance and Risk Management, 5(3), 157–166.
Alfi, S., Taleghani, M., Vatanparast, M. R., & Homayounfar, M. (2024). A dynamic model for assessing the sustainability of small and medium-sized enterprises. Journal of Optimization in Industrial Engineering, 17(2), 1–13.
Amini, A., & Esfahani, H. S. (2025). Easing credit for small firms amidst expansionary policy shifts: Iran 2005–2013. International Review of Economics & Finance, 98, 103828.
Andrieş, A. M., Ongena, S., & Sprincean, N. (2025). Sectoral credit allocation and systemic risk. Journal of Financial Stability, 76, 101363.
Asadollahi, S. Y., Taherabady, A., Shahveisi, F., & Kheirollahi, F. (2024). Dynamic analysis of a comprehensive model of risk management in the banking system using a systems thinking approach. Journal of Investment Knowledge, 13(49), 123–152.
Attar, M., Gilaninia, S., & Homayounfar, M. (2015). A study of the effect of green supply chain management's components on the performance of the pharmaceutical distribution companies system in Iran. Arabian Journal of Business and Management Review (OMAN Chapter), 5(8), 48.
Azadeh, S., Aslizadeh, A., Khakzar Bafruei, M., & Etemadi, A. (2023). Development of a dynamic model of bank strategy in uncertainty using the SD approach. Financial Management Strategy, 11(2), 203–226.
Cheung, H., Baumber, A., & Brown, P. J. (2022). Barriers and enablers to sustainable finance: A case study of home loans in an Australian retail bank. Journal of Cleaner Production, 334, 130211.
Chikwira, C., Vengesai, E., & Mandude, P. (2022). The impact of microfinance institutions on poverty alleviation. Journal of Risk and Financial Management, 15(9), 393.
Dang, V. D. (2021). Bank liquidity and lending behavior: Evidence from the Vietnamese banking system. International Journal of Business and Society, 22(1), 240–256.
Delafrooz, N., Homayounfar, M., & Taghipour Tamijani, M. (2019). Credit risk management in banks using a hybrid approach. Financial Engineering and Securities Management, 10(38), 94–116.
Dong, Y., & Wang, C. (2020). The effect of stimulus policy on lending behavior and bank risk: Evidence from the Chinese banking sector. Finance Research Letters, 37, 100761.
Gaviyau, W., & Godi, J. (2025). Banking sector transformation: Disruptions, challenges and opportunities. FinTech, 4(3), 48.
Golzarian Pour, S., Golmoradi, H., & Esmaili, M. (2020). Factors affecting Iran’s commercial bank credit with emphasis on non-performing loans. Program and Development Research, 1(1), 111–150.
Homayounfar, M., Kamali-Chirani, F., Chobar, A. P., & Daneshvar, A. (2025). Modeling the resilience of startups in the COVID-19 pandemic using the system dynamics approach. Journal of Safety Science and Resilience, 6(3), 100185.
Homayounfar, M., Toloie Ashlagy, A., & Fadaei Ashkiki, M. (2014). Presenting of investment model for interaction between industry and university with system dynamic. Journal of Investment Knowledge, 2, 41–70.
Huang, W., Molyneux, P., Ongena, S., & Xie, R. (2023). The new challenges of global banking and finance. The European Journal of Finance, 29(7), 693–699.
Igbanibo, D. S. (2020). Basel capital channel and lending behavior of banking institutions in Nigeria: An empirical investigation. Journal of Economics and Sustainable Development, 7(2), 124–134.
Jalaie, F. (2022). Application of system dynamics in financial decisions. Journal of Intelligent Marketing Management, 3(1), 15–33.
Jalalat, S., Shahroodi, K., Fadaei, M., & Homayounfar, M. (2025). Modeling customer purchase behavior in the insurance industry using system dynamics. Journal of Systems Thinking in Practice, 4(1), 44–69.
Karimi, H., & Mohammadi, P. (2022). A sustainable financial model for the social banking business. Financial Research Journal, 24(4), 480–504.
Khan, H.S., & Kutan, A.M. (2023). Explored the link between bank competition and financing constraints of small and medium-sized enterprises (SMEs) for a sample of 48 developing economies. Journal of International Financial Markets, Institutions and Money, 88, 101848.
Kharaghani, M., Homayounfar, M., & Taleghani, M. (2023). A system dynamics approach for value chain analysis in the pharmaceutical industry. Journal of Industrial and Systems Engineering, 15(2), 124–139.
Meisamy, H., & Gholipour, H. F. (2020). Challenges facing Islamic banking in Iran: Evaluation and policy implications. Journal of Islamic Monetary Economics and Finance, 6(3), 621–640.
Mosleh Shirazi, A., & Khalifeh, M. (2017). Simulating and policy making of internal and external SMEs' financing problems via system dynamics approach. Journal of Asset Management and Financing, 5(2), 69–92.
Murrar, A., Asfour, B., & Paz, V. (2024). Banking sector and economic growth in the digital transformation era: Insights from maximum likelihood and Bayesian structural equation modeling. Asian Journal of Economics and Banking, 8(3), 335–353.
Novellyni, D., & Ulpah, M. (2017). Non-performing loans, moral hazard, and lending behaviour of Indonesian banks. International Journal of Economics and Management, 11(S2), 365–378.
Nouri, M., Hosseini Shakib, M., & Khamseh, A. (2024). A model for analyzing barriers to production financing in small and medium enterprises (SMEs). Journal of Asset Management and Financing, 12(1), 37–58.
Oyelade, A. O., Ayeni, B. O., Ogundipe, M. O., Salisu, T. Q., Tijani, O. D., & Umah, I. E. (2019). Challenges and prospects of commercial bank loans extended to farmers in Lagelu Local Government of Oyo State, Nigeria. Asian Development Policy Review, 7(1), 31–42.
Pang, S., Deng, C., & Chen, S. (2022). System dynamics models of online lending platform based on Vensim simulation technology and analysis of interest rate evolution trend. Computational Intelligence and Neuroscience, 2022(1), 9776138.
Qian, S., You, H., & Zhang, X. (2025). Systemic risk between banks and firms in dual-layer dynamic networks. Emerging Markets Review, 66, 101276.
Saberifard, N., Homayounfar, M., Fadaei, M., & Taleghani, M. (2024). A system dynamics model to evaluate the LARG supply chain elements in the automotive industry. Journal of Systems Thinking in Practice, 3(4), 102–131.
Santos, A. M., Cincera, M., & Cerulli, G. (2024). Sources of financing: Which ones are more effective in innovation–growth linkage? Economic Systems, 48(2), 101177.
Shafieyan, M., Homayounfar, M., Oshk Sarai, M., Taleghani, M., & Fadaei, M. (1403). Designing a model for selecting financing sources for Iranian industrial enterprises with a fuzzy ISM-MICMAC approach. Journal of Financial Management Strategy, 12(2), 187–214.
Shariatmadari, A. S., Homayounfar, M., & Azadi, K. (2024). Fuzzy inference system for credit scoring: Legal clients in banking industry. Fuzzy Optimization and Modeling Journal, 5(1), 46–58.
Srairi, S. (2019). Transparency and bank risk-taking in GCC Islamic banking. Borsa Istanbul Review, 19, S64–S74.
Sterman, J. (2000). Business dynamics: Systems thinking and modeling for a complex world. Irwin/McGraw-Hill.
Tavakol, P., Nahavandi, B., & Homayounfar, M. (2023). A dynamics approach for modeling inventory fluctuations of the pharmaceutical supply chain in COVID-19 pandemic. Journal of Optimization in Industrial Engineering, 16(1), 105–118.
Zandi, G., Haseeb, M., Widokarti, J. R., Ahmed, U., & Chankoson, T. (2019). Towards crises prevention: Factors affecting lending behaviour. Journal of Security and Sustainability Issues, 9(1), 101–114.