The Dynamics of Inflation and Exchange Rate Pass-Through in Iran: An Application of the Markov Regime-Switching Model

Document Type : Scientific paper

Author

Researcher, Department of Statistics and Foreign Exchange Research, Central Bank of the Islamic Republic of Iran

10.22080/mrl.2025.30405.2210

Abstract

This study investigates the short- and long-term interactions between inflation and the real exchange rate in the Iranian economy over the period from February 2002 to September 2025. By employing a Markov Switching framework, the analysis captures the effects of structural changes and behavioral differences of variables under different economic conditions (boom and recession). The results indicate that during periods of economic expansion, exchange rate shocks gradually and partially affect price levels, reflecting price stickiness, delays in the pass-through of import costs, and managed inflation expectations of economic agents. In contrast, during recessions, the effect of the exchange rate on inflation is almost complete, and even minor exchange rate fluctuations can exert substantial inflationary pressures. Granger causality and variance decomposition analyses show that the exchange rate plays a leading role in determining inflation dynamics, while inflation has no significant effect on the exchange rate, consistent with Iran’s historical experience of exchange rate volatility and sanctions. The findings underscore the necessity of dynamic, long-term exchange rate management, indicating that monetary and fiscal policies alone are insufficient. Their combination with exchange rate policies and expectation management, particularly during recessions, is crucial to mitigate severe inflation volatility and maintain macroeconomic stability. This approach involves continuous monitoring of the exchange rate–inflation relationship, diversifying monetary policy tools through macroprudential policies alongside interest rate adjustments, paying special attention to recession periods when exchange rate effects on inflation are complete, and conducting complementary analyses by incorporating uncertainty indices, government fiscal policies, public debt, and external shocks. Long-term monitoring and policy adaptation to economic developments can help manage the complexities of the exchange rate–inflation relationship and strengthen Iran’s macroeconomic stability.

Keywords

Main Subjects

References

  • Aimer, N. M., & Lusta, A. A. (2021). Exchange rates and oil price under uncertainty and regime switching: A Markov-switching VAR approach. Economic Journal of Emerging Markets, 13, 200–215. https://doi.org/10.2139/econjem.2021.13.200
  • Alexius, A., & Holmberg, M. (2024). Pass-through with volatile exchange rates and inflation targeting. Review of World Economics, 160(2), 377–387. https://doi.org/10.1007/s10290-023-00502-8
  • Anderl, C., & Caporale, G. M. (2023). Nonlinearities in the exchange rate pass-through: The role of inflation expectations. International Economics, 173, 86–101. https://doi.org/10.1016/j.inteco.2022.10.003
  • Ben Cheikh, N., & Rault, C. (2017). Investigating first-stage exchange rate pass-through: Sectoral and macro evidence from euro area countries. The World Economy, 40(12), 2611–2638. https://doi.org/10.1111/twec.12499
  • Bessac, J., Ailliot, P., Cattiaux, J., & Monbet, V. (2016). Comparison of hidden and observed regime-switching autoregressive models for (u, v)-components of wind fields in the northeastern Atlantic. Advances in Statistical Climatology, Meteorology and Oceanography, 2, 1–16. https://doi.org/10.5194/ascmo-2-1-2016
  • Cakir, M., & Kaya, A. E. (2023). Does exchange rate pass-through change over time in Turkiye?. Istanbul Journal of Economics–Istanbul Iktisat Dergisi, 73, 359–383. https://doi.org/10.26650/IJE.2023.1010637202
  • Chroufa, M. A., & Chtourou, N. (2023). Asymmetric relationship between exchange rate and inflation in Tunisia: Fresh evidence from multiple-threshold NARDL model and Granger quantile causality. SN Business & Economics, 3, 121. https://doi.org/10.1007/s43546-023-00420-3
  • Citci, S. H., & Kaya, H. (2023). Exchange rate uncertainty and the connectedness of inflation. Borsa Istanbul Review, 23, 723–735. https://doi.org/10.1016/j.bir.2022.11.001
  • Comunale, M., & Kunovac, D. (2017). Exchange rate pass-through in the euro area. Working Paper Series, No. 2003. https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2910939
  • Creal, D. D., & Wu, J. C. (2017). Monetary policy uncertainty and economic fluctuations. International Economic Review, 58, 1317–1354. https://doi.org/10.1111/iere.12243
  • Dempster, A., Laird, N., & Rubin, D. (1977). Maximum likelihood from incomplete data via the EM algorithm. Journal of the Royal Statistical Society: Series B (Methodological), 39(1), 1–22. https://doi.org/10.1111/j.2517-6161.1977.tb01600.x
  • Dornbusch, R. (1987). Collapsing exchange rate regimes. Journal of Development Economics, 27, 71–85. https://doi.org/10.1016/0304-3878(87)90033-6
  • Ebrahimi, S., & Madanizadeh, S. A. (2016). Exchange rate pass-through and its determinants in Iran. Research Institute of Monetary and Banking Studies, Central Bank of Iran, Working Paper. (in Persian)
  • Eisi-Zadeh Roshan, Y. (2013). Exchange rate pass-through: The case of Iran. Journal of Economics, University of Mazandaran, 15(1), 25–50. (in Persian)
  • El Aboudi, S., Allam, I., & El Bakkouchi, M. (2023). ARDL modeling and analysis of the impact of the interaction between the exchange rate and inflation on economic growth in Morocco. Revue Francaise d’Economie et Gestion, 4, 168–187. https://doi.org/10.21511/rfeg.04(4).2023.14
  • Ezati Shurgoli, A., & Khodavisi, H. (2020). An estimate of exchange rate pass-through to domestic prices in Iran: An application of time-varying parameter models. Journal of International Economics and Economic Management, Urmia University, 13(2), 45–66. (in Persian)
  • Fandamu, H., Ndulo, M., Mudenda, D., & Fandamu, M. (2023). Asymmetric exchange rate pass through to consumer prices: Evidence from Zambia. Foreign Trade Review, 58, 1–17. https://doi.org/10.1177/00157325221143886
  • Forbes, K., Hjortsoe, I., & Nenova, T. (2018). The shocks matter: Improving our estimates of exchange rate pass-through. Journal of International Economics, 114, 255–275. https://doi.org/10.1016/j.jinteco.2018.03.001
  • Gereziher, H. Y., & Nuru, N. Y. (2023). Exchange rate pass-through to inflation in South Africa: Is there non-linearity?. African Journal of Economic and Management Studies, 14, 615–629. https://doi.org/10.1108/AJEMS-07-2022-0121
  • Goldberg, L., & Campa, J. M. (2010). The sensitivity of the CPI to exchange rates: Distribution margins, imported inputs, and trade exposure. Review of Economics and Statistics, 92(2), 392–407. https://doi.org/10.1162/rest.2010.1151
  • Hamilton, J. D. (2010). Regime switching models. In M. P. Clements & D. F. Hendry (Eds.), Macroeconometrics and time series analysis (pp. 202–209). London: Palgrave Macmillan.
  • Hansen, B. E. (1996). Erratum: The likelihood ratio test under nonstandard conditions: Testing the Markov switching model of GNP. Journal of Applied Econometrics, 7, 195–198. https://doi.org/10.1002/(SICI)1099-1255(199603)7:2<195::AID-JAE413>3.0.CO;2-L
  • Hosseini, N. S., Asgharpour, H., & Haghighat, J. (2017). Exchange rate pass-through on import price index of Iran: A smooth transition regression approach. Journal of Economics, Tabriz University, 12(3), 123–145. (in Persian)
  • Huseyin, O., & Kutlu, M. (2022). Revisiting the exchange rate pass-through in Turkey economy: Evidence from structural VAR model. International Journal of Contemporary Economics and Administrative Sciences, 12, 732–747. https://doi.org/10.1108/IJCEAS-07-2022-0103
  • Iliyasu, J., & Sanusi, A. R. (2022). The role of announced exchange rate policies on exchange rate pass-through to consumer prices in an oil-based small open economy. SN Business & Economics, 3, 10. https://doi.org/10.1007/s43546-022-00174-y
  • Jamar, N., & Aimon, H. (2021). Analysis of the effectiveness of monetary policy transmission through the exchange rate channel in maintaining price stability in emerging market countries. In Proceedings of the Sixth Padang International Conference on Economics Education, Economics, Business and Management, Accounting and Entrepreneurship (PICEEBA 2020) (pp. 252–261). Amsterdam: Atlantis Press. https://doi.org/10.2991/aebmr.k.210519.038
  • Jambaldorj, B. (2023). Inflation targeting and pass-through effect in Mongolia. In Challenges in Fiscal and Monetary Policies in Mongolia (pp. 181–197). Singapore: Springer Nature. https://doi.org/10.1007/978-981-19-1643-6_11
  • Koop, G., Pesaran, M. H., & Potter, S. M. (1996). Impulse response analysis in nonlinear multivariate models. Journal of Econometrics, 74, 119–147. https://doi.org/10.1016/0304-4076(95)01725-1
  • Krolzig, H.-M. (1998). Econometric modelling of Markov-switching vector autoregressions using MSVAR for Ox. Discussion Paper. Oxford: Nuffield College.
  • Krugman, P. (1987). The narrow moving band, the Dutch disease, and the competitive consequences of Mrs. Thatcher: Notes on trade in the presence of dynamic scale economies. Journal of Development Economics, 27, 41–55. https://doi.org/10.1016/0304-3878(87)90032-4
  • Lanne, M., Lutkepohl, H., & Maciejowska, K. (2010). Structural vector autoregressions with Markov switching. Journal of Economic Dynamics and Control, 34, 121–140. https://doi.org/10.1016/j.jedc.2009.09.007
  • Lebari, T., & Didi, E. (2021). Markov-switching vector autoregressive modelling (intercept adjusted): Application to international trade and macroeconomic stability in Nigeria (2000M1–2019M6). Asian Journal of Probability and Statistics, 12, 41–57. https://doi.org/10.9734/ajpas/2021/v12i130404
  • Masoudi, M., Masoudi, M., & Namdar, M. (2023). Application of discrete wavelet transform in investigating the relationship between inflation and exchange rate in the Iranian economy. BioGecko, 12, 252–260. https://doi.org/10.5281/zenodo.8114672
  • McCarthy, J. (2000). Pass-through of exchange rates and import prices to domestic inflation in some industrialized economies. Federal Reserve Bank of New York Staff Reports, No. 111. https://doi.org/10.2139/ssrn.229493
  • Mirza, N. B. N., Rizvi, S. K. A., & Boubaker, S. (2023). Exchange rate pass-through and inflation targeting regime under energy prices shocks. Energy Economics, 124, 106761. https://doi.org/10.1016/j.eneco.2023.106761
  • Monbet, V., & Ailliot, P. (2017). Sparse vector Markov switching autoregressive models: Application to multivariate time series of temperature. Computational Statistics & Data Analysis, 108, 40–51. https://doi.org/10.1016/j.csda.2016.08.007
  • Ndou, E. (2022). The exchange rate passthrough to consumer price inflation in South Africa: Has the inflation target band induced a structural change in the size of passthrough?. SN Business & Economics, 2, 51. https://doi.org/10.1007/s43546-022-00125-7
  • Nguyen Hong, N., Vo Thi Kim, L., Pham Hoang, A., & Tran Quoc Khanh, C. (2022). Understanding exchange rate pass-through in Vietnam. Cogent Economics & Finance, 10, 2139916. https://doi.org/10.1080/23322039.2022.2139916
  • Olamide, E., Ogujiuba, K., & Maredza, A. (2022). Exchange rate volatility, inflation and economic growth in developing countries: Panel data approach for SADC. Economies, 10, 67. https://doi.org/10.3390/economies10040067
  • Ozdogan, Z. (2022). An analysis of exchange rate pass-through to domestic prices: Evidence from Turkey. Eurasian Journal of Business and Economics, 15, 67–86. https://doi.org/10.17015/ejbe.2022.015.04
  • Ozyurt, S. (2016). Has the exchange rate pass-through recently declined in the euro area?. Working Paper Series, No. 1955. Frankfurt: ECB.
  • Papadamou, S., & Markopoulos, T. (2018). Interest rate pass through in a Markov-switching vector autoregression model: Evidence from Greek retail bank interest rates. The Journal of Economic Asymmetries, 17, 48–60. https://doi.org/10.1016/j.jeca.2018.01.002
  • Peer, A. H., & Baig, M. A. (2023). Inflation targeting and exchange rate pass-through in India: Lessons from international experience. Theoretical & Applied Economics, XXX, 239–254. https://doi.org/10.13106/tae.2023.XXX.239
  • Pham, T. A., Nguyen, H. H., Nguyen, D. N., & Vu, L. M. (2022). Exchange rate pass-through and its heterogeneity under the pegged regime: A case of Vietnam. Journal of the Asia Pacific Economy, 29, 612–633. https://doi.org/10.1080/13547860.2022.2030843
  • Sachs, J. D. (1985). The dollar and the policy mix. Brookings Papers on Economic Activity, 16(1), 117–197. https://doi.org/10.2307/2534422
  • Sadeghi, M., Totonchi, J., Abtahi, S. Y., & Tabatabaeinasab, Z. (2023). Analysis of exchange rate pass-through with emphasis on the inflationary environment and central bank intervention in Iran. Iranian Economic Research Journal, 30(2), 1–25. (in Persian)
  • Sari, Y. P. I. Y., Akbar, U. U., & Anis, A. (2023). Exchange rate pass-through during the COVID-19 pandemic in Indonesia. In Proceedings of the Ninth Padang International Conference on Economics Education, Economics, Business and Management, Accounting and Entrepreneurship (PICEEBA 2022) (pp. 141–147). Amsterdam: Atlantis Press. https://doi.org/10.2991/aebmr.k.230216.025
  • Shahrestani, P., & Rafei, M. (2020). The impact of oil price shocks on Tehran Stock Exchange returns: Application of the Markov switching vector autoregressive models. Resources Policy, 65, 101579. https://doi.org/10.1016/j.resourpol.2019.101579
  • Shambaugh, J. (2008). A new look at pass-through. Journal of International Money and Finance, 27, 560–591. https://doi.org/10.1016/j.jimonfin.2007.12.002
  • Sheferaw, H. E., & Sitotaw, K. W. (2023). Empirical investigation of exchange rate transmission into general inflation level in Ethiopia: SVAR approach. Cogent Business & Management, 10, 2243662. https://doi.org/10.1080/23311975.2023.2243662
  • Solórzano, D. (2023). Heterogeneous exchange rate pass-through in Mexico: What drives it?. Latin American Journal of Central Banking, 4, 100100. https://doi.org/10.52950/LAJCB.2023.4.100100
  • Tayebi, S. K., Nasrollahi, Kh., Yazdani, M., & Malek Hosseini, S. H. (2012). Analysis of exchange rate pass-through to inflation in Iran (1991–2012). International Journal of Economic Research, 8(4), 55–78. (in Persian)
  • Thornton, D. (2014). Monetary policy: Why money matters (and interest rates don’t). Journal of Macroeconomics, 40, 202–213. https://doi.org/10.1016/j.jmacro.2014.01.002
  • Tiamiyu, K. (2022). Exchange rate pass-through to inflation: Symmetric and asymmetric effects of monetary environment in Nigeria. Munich Personal RePEc Archive. https://mpra.ub.uni-muenchen.de/113223/
  • Valogo, M. K., Duodu, E., Yusif, H., & Baidoo, S. T. (2023). Effect of exchange rate on inflation in the inflation targeting framework: Is the threshold level relevant?. Research in Globalization, 6, 100119. https://doi.org/10.1016/j.resglo.2023.100119
  • Végh, C. (2001). Monetary policy, interest rate rules, and inflation targeting: Some basic equivalences. NBER Working Paper, No. 8684. https://doi.org/10.3386/w8684
  • Wai, S., Ismail, M. T., & Sek, S. K. (2013). A study of intercept adjusted Markov switching vector autoregressive model in economic time series data. Information Management and Business Review, 5, 379–384. https://doi.org/10.22610/imbr.v5i8.380
Macroeconomics Research Letter
Volume 20, Issue 48
December 2025
Pages 119-154

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History

  • Receive Date: 30 October 2025
  • Revise Date: 11 November 2025
  • Accept Date: 25 November 2025

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