Inflation Dynamics in Türkiye within the New Keynesian Theory Framework: Structural VAR Analysis of the Trade Balance, Exchange Rate, and Expectations

Year 2025, Volume: 11 Issue: 2, 679 - 699, 01.10.2025

Erkan Ağaslan

https://doi.org/10.20979/ueyd.1761627

Abstract

In recent years, chronic inflation has emerged as the biggest obstacle to sustainable growth, weakening macroeconomic stability in the Turkish economy. The aim of this study is to empirically explain inflation dynamics in Turkey, covering not only macroeconomic factors but also inflation expectations. Within the scope of the study, a structural VAR analysis estimation was conducted using Turkey's macro time series for the period between the first quarter of 2013 and the second quarter of 2025, incorporating the trade balance, exchange rate, oil price, and unemployment channels into the extended Phillips curve model within the New Keynesian framework. The short- and medium-term dynamics of unemployment, current account balance, expectations, output gap, exchange rate, and oil price on inflation were detailed using impulse response functions under structural shocks defined by Cholesky decomposition. The findings show that all variables have a significant effect on inflation but generally dampen within four to six quarters. Empirical analyses demonstrate that the transmission mechanisms of inflation shocks in the Turkish economy are shaped by both domestic demand (unemployment-output gap) and external (exchange rate-current account balance-commodity prices) components. It is concluded that coordinated measures targeting both demand and external shocks, along with expectation management, are important for policymakers.

Keywords

Inflation , Structural VAR , New Keynesian Phillips Curve

Yeni Keynesyen Teori Çerçevesinde Türkiye'de Enflasyon Dinamikleri: Dış Ticaret Dengesi, Kur ve Beklentiler Üzerine Yapısal VAR Analizi

Abstract

Son yıllarda kronikleşen enflasyon, Türkiye ekonomisinde makroekonomik istikrarı zayıflatan ve sürdürülebilir büyüme önündeki en büyük engel olarak öne çıkmıştır. Bu çalışmanın amacı, Türkiye’de makroekonomik faktörlerin yanı sıra enflasyon beklentilerini de kapsayacak şekilde enflasyon dinamiklerini ampirik olarak açıklamaktır. Çalışma kapsamında 2013 birinci çeyrek ile 2025 ikinci çeyrek dönemi için Türkiye’ye ait makro zaman serileri kullanılarak, Yeni Keynesyen Kuram çerçevesindeki genişletilmiş Phillips eğrisi modeline dış ticaret dengesi, döviz kuru, petrol fiyatı ve işsizlik kanallarını da ekleyen yapısal VAR analizi tahmini gerçekleştirilmiştir. Cholesky ayrıştırmasıyla tanımlanan yapısal şoklar altındaki etki-tepki fonksiyonlarıyla işsizlik, cari denge, beklentiler, çıktı açığı, döviz kuru ve petrol fiyatının enflasyon üzerindeki kısa ve orta vadeli dinamikleri ayrıntılı biçimde ortaya konmuştur. Bulgular, tüm değişkenlerin enflasyon üzerinde anlamlı bir etkisi olduğunu fakat genellikle dört-altı çeyrek içinde sönümlendiğini göstermektedir. Türkiye ekonomisinde enflasyon şoklarının yayılma mekanizmalarının hem iç talep (işsizlik-çıktı açığı) hem de dışsal (kur-cari denge-emtia fiyat) bileşenlerce şekillenmekte olduğunu ampirik analizler kanıtlamaktadır. Politika yapıcılar için hem talep hem de dışsal şoklara yönelik eşgüdümlü önlemler ve beklenti yönetiminin önemli olduğu çıkarımı yapılmıştır.

Keywords

Enflasyon , Yapısal VAR , Yeni Keynesyen Phillips Eğrisi

References

• Almajali, A. A. Q., and Almubidin, R. F. (2022). Estimating the indirect effects of monetary policy on inflation, the output gap and foreign reserves in Jordan using the New Keynesian model. Jordan Journal of Economic Sciences, 9(2), 172-188.
• Alpağut, S. (2024). Investigation of expected inflation according to Adaptive Expectations Hypothesis using Koyck Transformation: a study on Türkiye. İzmir İktisat Dergisi, 39(3), 698-714.
• Aydoğan, E. (2004). 1980 den Günümüze Türkiye de enflasyon serüveni. Yönetim ve Organizasyon, 11(1), 91–110.
• Ball, L., Mankiw, N. G., Romer, D., Akerlof, G. A., Rose, A., Yellen, J., and Sims, C. A. (1988). The New Keynesian Economics and the output-inflation trade-off. Brookings Papers on Economic Activity, 1988(1), 1.
• Bastian, E. F., Charles, S., and Marie, J. (2024). Inflation regimes and hyperinflation: a Post-Keynesian/structuralist typology. Cambridge Journal of Economics, 48(4), 681-708.
• Braga, J., and Serrano, F. (2023). Post-Keynesian Economics: New foundations by Marc Lavoie Chapter 8: Inflation Theory. Review of Political Economy,35(4), 1096-1108).
• Çiçen, Y. (2024). Decoding Inflation: Role of institutional quality in Türkiye using advanced econometric techniques, İstanbul İktisat Dergisi, 74(1), 1-35.
• Dalziel, P. (1999). A Post Keynesian Theory of asset price inflation with endogenous money. Journal of Post Keynesian Economics, 22(2), 227-245.
• de Jong, R. M., and Sakarya, N. (2016). The econometrics of the Hodrick-Prescott Filter. Review of Economics and Statistics, 98(2), 310-317.
• Dede, R., Tanjung, A. A., Lubis, I., Siregar, K. H., and Ikbar, P. (2023). Monetary policy in Indonesia: Dynamics of inflation, credibility index and output stability post covid 19: New Keynesian small macroeconomics approach. Cuadernos de Economía, 46(130), 21-30.
• Defina, R. H. (1991). International evidence on a New Keynesian Theory of the output-inflation trade-off. Journal of Money, Credit and Banking, 23(3), 410.
• Di Martino, F., and Sessa, S. (2020). Fuzzy transforms applied in seasonal time series analysis. In Fuzzy Transforms for Image Processing and Data Analysis (pp. 153–171). Springer International Publishing.
• Dickey, D. A., and Fuller, W. A. (1981). Likelihood ratio statistics for autoregressive time series with a unit root. Econometrica, 49(4), 1057.
• Duvan, O. B. (2024). Contribution of corporate profits to inflation in Türkiye after covid-19. Politik Ekonomik Kuram, 8(1), 109-125.
• Enders, Walter. (2015). Applied econometric time series. Wiley.
• Fu, Q., Hoijtink, H., and Moerbeek, M. (2021). Sample-size determination for the Bayesian t test and Welch’s test using the approximate adjusted fractional Bayes factor. Behavior Research Methods, 53(1), 139-152.
• Fuest, A., and Schmidt, T. (2024). Inflation expectation uncertainty in a New Keynesian framework. Journal of Money, Credit and Banking. https://doi.org/10.1111/jmcb.13218
• Gayaker, S., Ağaslan, E., Alkan, B., and Çiçek, S. (2021). The deterioration in credibility, destabilization of exchange rate and the rise in exchange rate pass-through in Turkey. International Review of Economics & Finance, 76, 571–587.
• Glynn, J., Nelson Perera, Reetu Verma. (2007). Unit root tests and structural breaks: A survey with applications. Revista de Métodos Cuantitativos Para La Economía y La Empresa, 3, 63-79.
• Gómez, V., Maravall, A. (1996). Programs TRAMO and SEATS; Instructions for the user. Working Paper 9628, Servicio de Estudios, Banco de España.
• Haschka, R. E. (2024). Examining the New Keynesian Phillips Curve in the U.S.: Why has the relationship between inflation and unemployment weakened? Research in Economics, 78(4), 100987.
• Hein, E. (2024). Inflation is always and everywhere a conflict phenomenon: post-Keynesian inflation theory and energy price driven conflict inflation, distribution, demand and employment. European Journal of Economics and Economic Policies: Intervention, 21(2), 202-231.
• Herranz, E. (2017). Unit root tests. WIREs Computational Statistics, 99(1), e1396. https://doi.org/10.1002/wics.1396.
• İlhan, A. (2024). Exploring inflation dynamics with the Phillips Curve in Türkiye: Evidence from the Markov Regime Switching Model. Cumhuriyet Üniversitesi İktisadi ve İdari Bilimler Dergisi, 25(2), 285-296.
• Kara, A. H. (2006). Turkish experience with implicit inflation targeting. Universitäts-Und Landesbibliothek Sachsen-Anhalt.
• Kilian, L., Lütkepohl, H. (2017). Structural Vector Autoregressive Analysis. Cambridge University Press. Kim, H. (2020). A missing element in the empirical post Keynesian theory of inflation-total credits to households: A first-differenced VAR approach to U.S. inflation. Journal of Post Keynesian Economics, 43(4), 640-656.
• Koç, H. (2023). The hybrid New Keynesian Phillips Curve: An application for Türkiye. Ekoist: Journal of Econometrics and Statistics, 0(39), 129-146.
• Lanne, M., Luoto, J. (2013). Autoregression-based estimation of the new Keynesian Phillips curve. Journal of Economic Dynamics and Control, 37(3), 561-570.
• Le Bihan, H., Marx, M., Matheron, J. (2023). Inflation tolerance ranges in the New Keynesian model. European Economic Review, 153, 104398.
• Lumsdaine, R. L., Papell, D. H. (1997). Multiple trend breaks and the unit-root hypothesis. Review of Economics and Statistics, 79(2), 212-218.
• McCown, J. R., Shaw, R. (2020). Estimating the New Keynesian Phillips Curve using expected inflation from financial market instruments. SSRN Electronic Journal. https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2580316
• Moessner, R. (2025). Effects of inflation expectations on inflation. National Institute Economic Review, 1-9. Naimoğlu, M. (2024). The Exchange rate pass-through effect in Türkiye: Fourıer Shin cointegration. Dokuz Eylül Üniversitesi Sosyal Bilimler Enstitüsü Dergisi, 26(1), 208-225.
• Öbekcan, M., Varlık, S., Ozdemir, B. K. (2024). Monetary policy uncertainty and exchange rate pass-through: evidence from Türkiye. Anadolu Üniversitesi İktisadi ve İdari Bilimler Fakültesi Dergisi, 25(3), 563-594.
• Özdoğan, Z. (2022). An analysis of exchange rate pass-through to domestic prices: Evidence from Turkey. Eurasian Journal of Business and Economics, 15(29), 67-86.
• Paige, R. L., Trindade, A. A. (2010). The Hodrick-Prescott Filter: A special case of penalized spline smoothing. Electronic Journal of Statistics, 4, 856-874. https://doi.org/10.1214/10-EJS570
• Pesaran, H. H., Shin, Y. (1998). Generalized impulse response analysis in linear multivariate models. Economics Letters, 58(1), 17-29.
• Rondina, F. (2018). Estimating unobservable inflation expectations in the New Keynesian Phillips Curve. Econometrics, 6(1), 6.
• Sim, C. Y. (2021). A review on output-inflation trade-off based on New Classical and New Keynesian Theories. MPRA Paper, 1-7.
• Tsoukis, C. (2020). New Keynesians and inflation. In Theory of Macroeconomic Policy (pp. 101-160). Oxford University Press.
• Türe, H., Akdi, Y. (2006). Mevsimsel eşbütünleşme: Tüketim ve GSYİH. İktisat, İşletme ve Finans, 21(242), 101-113. Uğurlu, E., Ojaghlou, M., Lau, E. (2025). Modeling structure of inflation in Türkiye: DCC-GARCH and Markov switching model. Journal of Financial Economic Policy, 17(4), 617-638.
• Wardhono, A., Nasir, M. Abd., Qori’ah, C. G., Indrawati, Y. (2021). Movement of inflation and New Keynesian Phillips Curve in ASEAN. Economies, 9(1), 34, 1-9.
• Zhou, W., Cheng, Y., Ding, S., Chen, L., Li, R. (2021). A grey seasonal least square support vector regression model for time series forecasting. ISA Transactions, 114, 82-98.
• Zivot, E., Andrews, D. W. K. (1992). Further evidence on the great crash, the oil-price shock, and the unit-root hypothesis. Journal of Business & Economic Statistics, 10(3), 251-270.