Interest Rate Transmission in Greece: Did EMU Cause a Structural Break? Dionysios Chionis and Costas Leon. Journal of Policy Modeling, Vol. 28, Issue 4, 2006, Elsevier.

Comovements in the European Financial Markets - Do They Change over Time? A VECM Approach. Costas Leon and George Filis. Transactions on Business and Economics, 3(3), Journal of the World Scientific and Engineering Academy and Society, 2006.

Cyclical Fluctuations and Transmission Mechanisms of the GDP, Investments and the Stock Exchange in Greece: Evidence from Spectral and VAR Analysis.

Costas Leon and George Filis. Journal of Money, Investment and Banking. ISSN 1450-288X Issue 6, 2008.

Synchronization of the Polish and the European Business Cycles. Dionysios Chionis and Costas Leon. Journal of Economic Asymmetries, Vol.6, No. 1, June 2009, ISSN 1703-4949.

Are EU and Bulgarian Business Cycles Synchronized? Christina Beneki, George Filis, Christos Floros and Costas Leon. Forthcoming in Journal of Money, Investment and Banking. ISSN 1450-288X. Issue 14, 2010.

Stochastic Shocks of the European and the Greek Economic Fluctuations. Nikolaos Georgikopoulos and Costas Leon. International Journal of Business Policy and Economics Vol. 3, No 1, 2010: 89-107.

Signal Extraction and Forecasting of the UK Tourism Income Time Series. A Singular Spectrum Approach. Christina Beneki, Bruno Eeckels and Costas Leon. Journal of Forecasting, 9 March 2011, DOI:10:1002/for.1220.

Tourism Income and Economic Growth in Greece: Empirical Evidence from their Cyclical Components. Bruno Eeckels, George Filis and Costas Leon. Tourism Economics, Vol. 18, No4, 2012.