23. Nazlioglu, S., Gurel, S.P., Gunes, S., Akin, T., Karul, C., Kar, M. (2025). Inflation co-movement: new insights from quantile factor model. Empirical Economics, 69, 431-464. https://doi.org/10.1007/s00181-025-02733-0
22. Payne, J.E., Nazlioglu, S., Karul, C., Smyth, R. (2024). Stochastic convergence of renewable energy intensity across US States: evidence from a panel unit root test with asymmetries and common factors. Applied Economics, forthcoming. https://doi.org/10.1080/00036846.2024.2424499
21. Nazlioglu, S., Karul, C. (2024). Testing for Granger causality in heterogeneous panels with cross-sectional dependence. Empirical Economics, 67, 1541–1579. https://doi.org/10.1007/s00181-024-02589-w
20. Misra, B. S., Kar, M., Nazlioglu, S., Karul, C. (2024) Income convergence of Indian states in the post-reform period: evidence from panel stationarity tests with smooth structural breaks. Journal of the Asia Pacific Economy, 29(1), 424-441. https://doi.org/10.1080/13547860.2021.2022352
19. Nazlioglu, S., Gurel, S.P., Gunes, S., Karul C. (2024) Asymmetric persistence in Turkish interest and inflation rates: New evidence from quantile unit root test with structural shifts. International Journal of Finance & Economics, 29(4), 3831-3839. https://doi.org/10.1002/ijfe.2855
18. Payne, J.E., Saunoris, J.W., Nazlioglu, S., Karul C. (2023). Stochastic convergence analysis of US state economic freedom sub-components: Evidence from unit root tests for bounded processes. The American Journal of Economics and Sociology, 82(4), 319-348. https://doi.org/10.1111/ajes.12509
17. Payne, J.E., Saunoris, J.W., Nazlioglu, S., Karul C. (2023). The convergence dynamics of economic freedom across U.S. states. Southern Economic Journal, 89(4), 1216-1241. https://doi.org/10.1002/soej.12629
16. Akyuz, M., Gueye, G.N., Karul, C. (2023). Revisiting the Long-Run Relationship Between Inward/Outward FDI and Income Inequality: New Evidence from the OECD. International Economic Journal, 37(2), 220-244. https://doi.org/10.1080/10168737.2023.2182814
15. Akyuz, M., Karul, C. (2023). The effect of economic factors on suicide: an analysis of a developing country. International Journal of Human Rights in Healthcare, 16(5),473-482. https://doi.org/10.1108/IJHRH-03-2022-0023
14. Nazlioglu, S., Lee, J., Tieslau, M., Karul, C., You, Y. (2023). Smooth structural changes and common factors in nonstationary panel data an analysis of healthcare expenditures. Econometric Reviews 42(1), 78-97. https://doi.org/10.1080/07474938.2022.2156740
13. Akçay, S.B., Karul, C., Akyüz, M. (2023). Mortgage credit and house prices: the Turkish case. International Journal of Housing Markets and Analysis 16(2), 318-335. https://doi.org/10.1108/IJHMA-11-2021-0127
12. Berk, E., Nazlıoğlu, E.H., Karul, Ç. (2022). Testing the Tourism-led Growth hypothesis with structural breaks: The case of Turkey. Pamukkale University Journal of Social Sciences Institute 53, 37-52. https://doi.org/10.30794/pausbed.1102172
11. Yıldırım, M.O., Karul, C. (2022). Does tourism affect house prices in Turkey? Evidence from smooth structural break tests. International Journal of Housing Markets and Analysis, 15(3), 1033-1052. https://doi.org/10.1108/IJHMA-03-2021-0035
10. Akyuz, M., Gueye, G.N., Karul, C. (2022). Long-run dynamics between trade liberalization and income inequality in the European Union: a second generation approach. Empirica, 49, 769–792. https://doi.org/10.1007/s10663-022-09539-8
9. Nazlioglu, S., Lee, J., Karul, C., You, Y. (2022). Testing for stationarity with covariates: more powerful tests with non-normal errors. Studies in Nonlinear Dynamics & Econometrics, 26(2), 191-203. https://doi.org/10.1515/snde-2019-0038
8. Nazlioglu, S., Payne, J.E., Lee, J., Rayos-Velazquez, M., Karul, C. (2021). Convergence in OPEC Carbon Dioxide Emissions: Evidence from New Panel Stationarity Tests with Factors and Breaks. Economic Modelling, 100 105498. https://doi.org/10.1016/j.econmod.2021.105498
6. Akyuz, M., Karul, C., Demir, I. (2020). Life Expectancy and Trade Openness: Causality in Latin America. International Journal of Social Economics, 47(10), 1265-1281. https://doi.org/10.1108/IJSE-01-2020-0013
2. Nazlioglu, S., Karul, C., (2017). "A Panel Stationarity Test with Gradual Structural Shifts: Re-investigate the International Commodity Price Shocks", Economic Modelling, 61, 181-192. https://doi.org/10.1016/j.econmod.2016.12.003
1. Gunes, S., Karul, C., (2016). "The Exchange Rate Overshooting in TURKEY", Pamukkale Journal of Eurasian Socioeconomic Studies, 3(1), 27-35. https://doi.org/10.5505/pjess.2016.02986
33. Karul, Ç. (2025). "A Stochastic Convergence Analysis of Economic Freedom and Its Subcomponents in European Union Countries", Economic Research and Financial Markets Congress with International Participation (IERFM'25), May 8-10, Bursa, Türkiye.
32. Karul, Ç. (2025). "A Fisher-Type Panel Unit Root Test for Bounded Time Series with Cross-Sectional Dependence", 2nd International Data Analytics and Machine Learning International Conference (DATAMACLEA’25), May 5-6, Ankara, Türkiye.
31. Kar, M., Nazlioglu, S., Karul, C., Ozayturk, I. (2024). "Does Economic Complexity Matter for Financial Development? Evidence from the Emerging Market Economies", Türkiye Ekonomi Sempozyumu, November 8-9, Bursa, Türkiye.
30. Koncak, A., Karul, Ç., Berk, E. (2023). “Analysis of Unemployment Hysteresis by Gender in Türkiye for Different Time Scales” 30th Conference on Economics (IceTea2023), November 15-18, Antalya, Türkiye.
29. Nazlioglu, S., Karul, C. (2023). “Testing for Granger Causality in Heterogeneous Panels with Cross-sectional Dependence: Causal Interrelationships between Export and Growth”, International Congress on Eurasian Economies, September 19-20, İzmir, Türkiye.
28. Berk, E., Karul, Ç., Koncak, A. (2023). “Testing for Unemployment Hysteresis by Gender and Education Status in Türkiye”, International Congress on Eurasian Economies, September 19-20, İzmir, Türkiye.
27. Berk, E., Koncak, A., Nazlıoğlu, E.H., Karul, Ç., (2023). “World Energy Price Shocks Are Permanent or Not?”, 1st International Energy Congress, March 16-17, İstanbul, Türkiye.
26. Akyuz, M., Karul, C., Gueye, G.N., (2021). “Revisiting the Relationship between FDI and Income Inequality: Cross Section Dependence ”, 91th 91st Annual Meeting of Southern Economic Association, November 20-22, Texas, USA.
25. Akçay, S.B., Akyüz, M., Karul, C., (2021). "The Causality between Mortgage Credit and House Price: The Turkish Case", World Finance Conference, August 3 – 6, Kristiansand, Norway.
24. Akçay, S.B., Akyüz, M., Karul, C., (2021). "The Causality between Mortgage Credit and House Price: The Turkish Case", 27th Annual Conference of the European Real Estate Society (ERES), June 2 – 5, Kaiserslautern, Germany.
23. Akyuz, M., Karul, C., Gueye, G.N., (2020). “Long Run Dynamics between Trade Liberalization and Income Inequality in the European Union: The Case for Cross-Section Dependence”, 46th Annual Conference of Eastern Economic Association, February 29, Boston, Massachusetts, USA.
22. Nazlioglu, S., Karul, C., Lee, J., (2020). “Panel Stationarity Tests with Cross-Section Dependence”, XX. International Symposium on Econometrics, Operational Research and Statistics, February 12-14, Ankara, Turkey.
21. Nazlioglu, S., Lee, J., Karul, C., Tieslau, M., You, Y., (2020). “Testing for Unit Roots in Panel Data with Smooth Structural Changes and Common Factors”,XX. International Symposium on Econometrics, Operational Research and Statistics, February 12-14, Ankara, Turkey
20. Nazlioglu, S., Lee, J., Karul, C., Tieslau, M., You, Y., (2019). “Smooth Structural Changes and Common Factors in Testing for Unit Roots in Panel Data”, 25th International Panel Data Conference, July 4-5, 2019, Vilnius, Lithuania.
19. Nazlioglu, S., Lee, J., Karul, C., Tieslau, M., You, Y., (2019). “Panel Unit Root Tests with Smooth Structural Changes and A Factor Structure”, 27th Annual Symposium of the Society for Nonlinear Dynamics and Econometrics, March 28-29, 2019, Texas, USA.
18. Nazlioglu, S., Kucukkaplan, I., Karul, C. (2018) “Shocks to Commodity Prices: What New Methods Tell Us?” International Congress on Political, Economic and Social Studies, June 28-30, 2018, Venice, ITALY.
17. Nazlioglu, S., Karul, C., Kucukkaplan, I. (2017) “On the Purchasing Power Parity in Turkey: The Role of Structural Changes” International Conference on Eurasian Economies, October 05-07, 2017, Bishkek, Kyrgyzstan.
16. Berk, E., Ivrendi, M., Karul, C. (2017) “Basit ve DİVİSİA Ölçümlerle Türkiye’de Para Talebinin Ampirik Analizi” 18th International Symposium on Econometrics, Operations Research and Statistics, October 05-07, 2017, Trabzon, Turkey.
15. Nazlioglu, S., Karul, C., Kucukkaplan, I. (2017) “Finite Sample Properties of Fourier Stationary Test Under Different Break Types” 18th International Symposium on Econometrics, Operations Research and Statistics, October 05-07, 2017, Trabzon, Turkey
14. Nazlioglu, S., Agir, H., Karul, C. (2017) “Structural Breaks and Panel Causality” 18th International Symposium on Econometrics, Operations Research and Statistics, October 05-07, 2017, Trabzon, Turkey.
13. Nazlioglu, S., Karul, C. (2017) “Yumuşak Kırılmalı Panel LM Birim Kök Testi” European Union Relations Economics, Finance and Econometrics (EUREFE) 2017, July 27-29, 2017, Aydın, Türkiye.
12. Nazlioglu, S., Karul, C., Koncak, A., Küçükkaplan, İ. (2017) “Türkiye’de Satın Alma Gücü Paritesi Hipotezinin Geçerliliği” European Union Relations Economics, Finance and Econometrics (EUREFE) 2017, July 27-29, 2017, Aydın, Türkiye.
11. Nazlioglu, S., Karul, C. (2017) “Panel LM unit root test with gradual structural shifts” 40th International Panel Data Conference, July 7-8, 2017, Thessaloniki, Greece.
10. Karul, C., Berk, E., Koncak, A. (2017) “Sustainability of Current Account Deficit in Turkey: A New Perspective with New Approaches” 8th International Conference of Political Economy, June 28-30, 2017, Belgrade, Serbia.
9. Nazlioglu, S., Karul, C., Kucukkaplan, I. (2017) “Dynamics of International Commodity Prices: A New Look at with New Perspectives” International Congress of Energy Economy and Security, March 25, 2017, İstanbul, Turkey.
8. Nazlioglu, S. Karul, C., Koncak, A. (2016) “A Fractional Stationarity Test with Gradual Shifts and the Hysteresis Hypothesis in OECD Countries” International Conference on Changing World and Social Research, October 14-16, 2016, Barcelona, Spain.
7. Nazlioglu, S., Karul, C., Koncak, A. (2016) “Testing The Hysteresis Hypothesis in OECD Countries: New Insights from Stationarity Tests with Smoothing Shifts” International European Union Relations, Economics, Finance and Econometrics Conference, July 14-16, 2016, Aydın, Turkey.
6. Nazlioglu, S., Karul, C., Koncak, A. (2016) “Smoothing breaks and stationarity test with fractional frequency: re-examining the PPP hypothesis in Turkish exchange rates” International Work-Conference on Time Series Analysis, June 27-29, 2016, Granada, Spain.
5. Nazlioglu, S., Karul, C. (2016) “Kademeli Yapısal Kırılmalı Panel Birim Kök Önerisi: Türkiye’de Satın Alma Gücü Paritesi Hipotezinin Test Edilmesi” 17th International Symposium on Econometrics, Operations Research and Statistics, June 02-04, 2016, Sivas, Turkey.
4. Gunes, S., Karul, C., (2015) "Exchange Rate Overshooting: An Empirical Study on Turkey", 2nd World Keynes Conference, September 9-12, 2015, Denizli, Turkey.
3. Nazlioglu, S., Karul, C. (2015) "The Flexible Fourier Form and Panel Stationary Test with Gradual Shifts", 2nd Annual Conference of International Association for Applied Econometrics, June 25-27, 2015, Thessaloniki, Greece.
2. Nazlioglu, S., Karul, C. (2015) "Panel Unit Root Test with Gradual Structural Shifts", 16th International Symposium on Econometrics, Operations Research and Statistics, May 07-12, 2015, Edirne, Turkey.
1. Nazlioglu, S., Karul, C. (2015) "The Flexible Fourier Form and Panel Stationary Test with Gradual Shifts", International Conference on New Trends in Econometrics and Finance Conference, March 23-28, 2015, Sharjah-Dubai, UAE.