Economic and Monetary Union: What Kind of Convergence?

Igor Cvečić; Marko Tomljanović

doi:10.47743/saeb-2025-0019

Authors

Igor Cvečić Faculty of Economics and Business, University of Rijeka
Marko Tomljanović Faculty of Economics and Business, University of Rijeka

DOI:

https://doi.org/10.47743/saeb-2025-0019

Keywords:

economic and monetary union, nominal convergence, real convergence, optimal currency area theory, sustainable integration.

Abstract

This paper explores the complexities of convergence within the European Union, focusing on both nominal and real convergence in the context of the Economic and Monetary Union (EMU). The authors revisit the theoretical underpinnings of monetary integration, drawing from Optimal Currency Area (OCA) theory and its evolution, while analysing the benefits and costs of membership in a monetary union. Special attention is given to the convergence paths of EU Member States not yet part of the Eurozone, evaluating their alignment with Maastricht criteria, structural preparedness, and real convergence trends. Through a combination of theoretical insights and empirical assessments, the study presents a comparative analysis of inflation rates, exchange rate volatility, long-term interest rates, and fiscal indicators in non-EMU countries. It highlights growing disparities in economic performance and inflation post-2020, intensified by recent macroeconomic shocks. The research underscores the importance of not just satisfying nominal entry criteria but achieving sustainable real convergence – reflected in GDP per capita, labour market flexibility, and structural similarity with Euro-zone economies. The findings suggest that while Denmark, Sweden, Czechia and Bulgaria appear institutionally and economically aligned for euro adoption, countries like Hungary, Poland and Romania lag in meeting core convergence metrics. A more holistic and policy-driven approach to integration could be essential, promoting structural cohesion and solidarity mechanisms to mitigate regional disparities and ensure the long-term viability of the EMU.

References

Alcidi, C. (2019). Economic Integration and Income Convergence in the EU. In: Economic Convergence or Divergence in the EU? Intereconomics - Forum, Vol. 54; No 1; p. 5-11. ZBW – Leibniz Information Centre for Economics. DOI: 10.1007/s10272-019-0783-6. Available: https://www.intereconomics.eu/contents/year/2019/number/1/article/economic-convergence-or-divergence-in-the-eu.html (March 2025)

Alesina, A.; Tabellini, G.; Trebbi. F. (2017). Is Europe an Optimal Political Area? NBER Working Paper No. 23325 (April 2017). National Bureau of Economic Research: Cambridge (MA, USA). Available: https://www.nber.org/system/files/working_papers/w23325/w23325.pdf (December 2024)

Andor, L. (2019). Fifteen Years of Convergence: East-West Imbalance and What the EU Should Do About it. In: Economic Convergence or Divergence in the EU? Intereconomics - Forum, Vol. 54; No 1; p. 18-23. ZBW – Leibniz Information Centre for Economics. DOI: 10.1007/s10272-019-0785-4. Available: https://www.intereconomics.eu/contents/year/2019/number/1/article/economic-convergence-or-divergence-in-the-eu.html (March 2025)

Arribas, I.; Bensassi, S.; Tortosa-Ausina, E. (2020). Trade integration in the European Union: Openness, interconnectedness, and distance. North American Journal of Economics and Finance, vol. 52, Article 101167. https://doi.org/10.1016/j.najef.2020.101167 (December 2024)

Bação, P.; Cerdeira, S.; Duarte, A.P. (2019). Portugal in the Eurozone: Evolution and Expectations. Scientific Annals of Economics and Business, vol. 66 (Special issue - dedicated to the International Conference on “20 Years of the Euro: Achievements and Challenges”), pp. 173–189. https://doi.org/10.47743/saeb-2019-0033

Barro, R.J. (2015). Convergence and Modernisation. The Economic Journal. Royal Economic Society / Wiley. Vol. 125, issue 585, pp. 911-942. https://doi.org/10.1111/ecoj.12247

Barro, R. J.; Sala-i-Martin, X. (1992). Convergence. Journal of Political Economy, vol. 100, No 2, pp. 223–251. Available: http://www.jstor.org/stable/2138606 (January 2025)

Barro, R. J., Sala-I-Martin, X. (1997). Technological Diffusion, Convergence, and Growth. Journal of Economic Growth, vol. 2, No 1, pp. 1–26. Available: http://www.jstor.org/stable/40215930 (January 2025)

Bayoumi, T.; Eichengreen, B. (1996). Ever Closer to Heaven? An Optimum-Currency-Area Index for European Countries. University of California, Berkeley. Available: https://eml.berkeley.edu/~eichengr/research/c96-78.pdf (November 2024)

Bayoumi, T.; Eichengreen, B. (1992). Shocking Aspects of Monetary Unification. NBER Working Paper Series. National Bureau of Economic Research, NBER Working Paper No. 3949, Cambridge (MA, USA). DOI 10.3386/w3949.

Beck, K. (2021). Why business cycles diverge? Structural evidence from the European Union. Journal of Economic Dynamics & Control, vol. 133 (December 2021, 104263), Elsevier B.V. ISSN 0165-1889. Available: https://doi.org/10.1016/j.jedc.2021.104263 (https://www.sciencedirect.com/science/article/pii/S0165188921001986)

Beker Pucar, E. (2020). Monetary Challenges of Emerging European Economies Towards the Euro zone. Teme – Journal for Social Sciences, No 3, pp. 883-900. University of Niš (Serbia). https://doi.org/10.22190/TEME180919060B

Belke, A.; Baumgärtner, F. (2005). Fiscal Transfer Mechanisms and Asymmetric Shocks in EMU. In: Bradley, J.; Petrakos, G.; Traistaru, I. (eds) Integration, Growth and Cohesion in an Enlarged European Union. ZEI Studies in European Economics and Law, vol 7. Springer, New York, NY. https://doi.org/10.1007/0-387-22854-3_13

Berti, K.; Meyermans, E. (2017). Sustainable convergence in the euro area: A multi dimensional process. In: Leandro, J.E.; Giudice, G. (eds), European Economy: Institutional Paper 072 (Quarterly Report on the Euro Area), Vol. 16, No 3. European Commission Directorate-General for Economic and Financial Affairs; Luxembourg: Publications Office of the EU. ISBN 978-92-79-77453-9, ISSN 2443-8014. doi:10.2765/93210. Available: https://economy-finance.ec.europa.eu/publications/quarterly-report-euro-area-qrea-vol-16-no-3-2017_en (March 2025)

Bordignon, M.; Gatti, N; Onorato M.G. (2024). A Tale of Two Crises. IEP@BU Policy Brief (October 2024). Bocconi University: Institute for European Policymaking. Available: https://iep.unibocconi.eu/publications/policy-briefs/policy-brief-n28-tale-two-crises (January 2025)

Bräuning, F.; Sheremirov, V. (2021). The Transmission Mechanisms of International Business Cycles: Output Spillovers through Trade and Financial Linkages. Working Papers, Federal Reserve Bank of Boston, No 21-13., https://doi.org/10.29412/res.wp.2021.13 (January 2025)

Bulboaca, S. (2023). Real Economic Convergence in the European Union. Journal of Smart Economic Growth. Vol. 8, No 1. ISSN 2537-141X Available: https://jseg.ro/index.php/jseg/article/view/214 (March 2025)

Burriel, P.; Chronis, P.; Freier, M.; Hauptmeier, S.; Reiss, L.; Stegarescu, D.; Van Parys, S. (2020). A fiscal capacity for the euro area: Lessons from existing fiscal-federal systems. ECB Occasional Paper Series, No 239 (April 2020). European Central Bank (ECB): Frankfurt am Main (Germany). ISBN 978-92-899-4245-4, ISSN 1725-6534, doi:10.2866/817504. Available: https://www.ecb.europa.eu/pub/pdf/scpops/ecb.op239~d9fdddad32.en.pdf (January 2025)

Buti, M; Sapir, A. (2002). EMU in the Early Years: Differences and Credibility. In: EMU and Economic Policy in Europe: The Challenge of the Early Years. Edward Elgar (Cheltenham, UK; Northampton, MA, USA). Doi 10.4337/1843761521.00010.

Chedi, M.M.A. (2024). Does Economic Policy Coordination Improve Business Cycles Synchronization in WAEMU states? BNR Economic Review, National Bank of Rwanda (NBR), Vol. 21, No 1, pp. 103-120 Available: https://www.ajol.info/index.php/BNRER/issue/view/24149 (January 2025)

Convergence Report (2024). European Central Bank, Frankfurt am Main (Germany). doi:10.2866/620006. Available: https://www.ecb.europa.eu/press/other-publications/convergence/pdf/ecb.cr202406~475c2172bc.en.pdf (January 2025)

Correia, L.; Martins, P. (2019). The European crisis: Analysis of the macroeconomic imbalances in the rescued euro area countries. Journal of International Studies, vol. 12, No 2, pp. 22-45. doi:10.14254/2071-8330.2019/12-2/2

Council of the EU (2024). How to join the euro area. Available: https://www.consilium.europa.eu/en/policies/join-the-euro-area/ (January 2025)

Coutinho, L.; Turrini, A. (2020). Real Convergence Across the Euro Area. Intereconomics, Vol. 55, pp. 301–311. Available: https://doi.org/10.1007/s10272-020-0920-2 (January 2025)

Creel, J. (2018). Convergence in EMU: What and How? Euro Area Scrutiny. Directorate-General for Internal Policies of the Union: Economic Governance Support Unit – IPOL. PE 614.504 (April 2018), European Parliament, European Union. ISBN 978-92-846-2799-8 / ISBN 978-92-846-2798-1. DOI: 10.2861/169989 / DOI:10. 2861/965022. Available: https://www.europarl.europa.eu/RegData/etudes/IDAN/2018/614504/IPOL_IDA(2018)614504_EN.pdf (February 2025)

Cvečić, I.; Tomljanović, M. (2022). Reboosting European Convergence after COVID-19: The Case of Croatia’s Monetary Integration. In: European Integration Process – Crisis and Resilience in the aftermath of the COVID – 19 pandemic, pp. 215-232. Coimbra: Coimbra University Press. ISBN-13 (15) 978-989-26-2364-1. doi: 10.14195/978-989-26-2364-1

Dabrowski, M. (2015). Monetary Union and Fiscal and Macroeconomic Governance. European Economy Discussion Papers. European Commission, DG EcoFin. Luxembourg: Publications Office of the European Union. Discussion Paper 013. ISBN 978-92-79-48682-1 (online) – doi:10.2765/57987 (online) / ISBN 978-92-79-48681-4 (print) – doi:10.2765/226914 (print).

De Grauwe, P. (2006). What Have we Learnt about Monetary Integration since the Maastricht Treaty? Journal of Common Market Studies, Blackwell Publishing Ltd, Oxford (UK) & Malden (MA, USA), Journal compilation - JCMS 2006, Vol. 44., No 4. pp. 711–730. Available: https://baobab.uc3m.es/monet/monnet/IMG/pdf/Degrauwe_2006.pdf (January 2025)

de Haan, J.; Jacobs, J.P.A.M.; Zijm, R. (2024). Coherence of the business cycles of prospective members of the euro area and the euro area business cycle. Economic Systems, Vol. 48, Issue 4 (101221), ISSN 0939-3625. https://doi.org/10.1016/j.ecosys.2024.101221 (https://www.sciencedirect.com/science/article/pii/S0939362524000438)

Diaz del Hoyo, J.L.; Dorrucci, E.; Heinz, F.F.; Muzikarova, S. (2017). Real convergence in the euro area: a long-term perspective. ECB Occasional Paper Series, No 203 (December 2017). European Central Bank, Frankfurt am Main (Germany). ISSN 1725-6534 (pdf) ISBN 978-92-899-2865-6 (pdf). DOI 10.2866/121513 (pdf). Available: https://www.ecb.europa.eu/pub/pdf/scpops/ecb.op203.en.pdf?8ff80dd3a3b58f231105f3e4835b2928 (March 2025)

Dulgheriu, R.G. (2015). Nominal and Real Convergence in the Euro Area. SEA - Practical Application of Science. Romanian Foundation for Business Intelligence, Editorial Department. Vol. III, Issue 1 (7 / 2015), pp. 215-226. Available: https://seaopenresearch.eu/Journals/articles/SPAS_7_32.pdf (January 2025)

European Central Bank (2015). Real convergence in the euro area: evidence, theory and policy implications. ECB Economic Bulletin, Issue 5. Frankfurt am Main, Germany. ISSN 2363-3417 (epub) ISSN 2363-3417 (online). Available: https://www.ecb.europa.eu/pub/pdf/ecbu/eb201505.en.pdf (March 2025)

European Economy (1990). One market, one money: An evaluation of the potential benefits and costs of forming an economic and monetary union. No. 44 (October 1990). Commission of the European Communities - Directorate-General for Economic and Financial Affairs; Brussels, Belgium. ISSN 0379-0991. Available: https://ec.europa.eu/economy_finance/publications/pages/publication7454_en.pdf (December 2024)

Eurostat (2025a), European Central Bank (2025). Exchange rates and interest rates. Available: https://ec.europa.eu/eurostat/databrowser/bookmark/269f97da-5803-4826-b12a-58f6b7cbd6e9?lang=en

Eurostat (2025b). HICP - inflation rate. Available: https://ec.europa.eu/eurostat/databrowser/view/tec00118/default/table?lang=en&category=t_prc.t_prc_hicp

Eurostat (2025c). EMU convergence criterion series – Annual data. Available: https://ec.europa.eu/eurostat/databrowser/view/irt_lt_mcby_a/default/table?lang=en&category=irt.irt_lt.irt_lt_mcby

Eurostat (2025d). Government deficit and debt. Available: https://ec.europa.eu/eurostat/databrowser/explore/all/economy?lang=en&subtheme=gov.gov_gfs10.gov_10dd&display=list&sort=category&extractionId=gov_10dd_edpt1

Eurostat (2025e). GDP per capita in PPS. Available: https://ec.europa.eu/eurostat/databrowser/view/tec00114/default/table?lang=en&category=t_na10.t_nama10.t_nama_10_ma

Eurostat (2025f). Share of trade with the EU27 (from 2020). Available: https://ec.europa.eu/eurostat/databrowser/view/tet00037/default/table?lang=en&category=t_ext_go_lti.t_ext_go_lti_int.t_ext_go_lti_int_

Ficek, W. (2024). Is the euro area a prelude to the fiscal union? Introduction to the ‘fiscal confluence criteria’. International Entrepreneurship Review, Vol. 10, No.3, pp. 7-20. https://doi.org/10.15678/IER.2024.1003.01

Fidrmuc, J. (2001). The Endogeneity of Optimum Currency Area Criteria, Intraindustry Trade and EMU Enlargement. Bank of Finland - Institute for Economies in Transition, BOFIT Discussion Paper No. 8/2001, Helsinki (Finland). Available: https://ssrn.com/abstract=1016024 or http://dx.doi.org/10.2139/ssrn.1016024 (December 2024)

Frankel, J.A.; Rose, A.K. (1998). The Endogeneity of the Optimum Currency Area Criteria. The Economic Journal, 108(449), pp. 1009–1025. Available: http://www.jstor.org/stable/2565665 (December 2024)

García Solanes, J.; Beyaert, A.; Lopez-Gomez, L. (2025). Income convergence clubs in the Eurozone: A tale beyond the core/periphery divide. Applied Economic Analysis. Vol. 33, No. 97, pp 1-18. Emerald Publishing Limited. ISSN 2632-7627. DOI 10.1108/AEA-02-2024-0085. Available: https://www.emerald.com/insight/2632-7627.htm (March 2025)

Gashi, S.; Avdulaj, J. (2024). Economic convergence of the Balkan countries towards the European Union [Special issue]. Journal of Governance & Regulation, Vol. 13, No 1, pp. 471–479. Available: https://doi.org/10.22495/jgrv13i1siart19 (March 2025)

Gogas, P. (2013). Business cycle synchronisation in the European union: The effect of the common currency. OECD Journal: Journal of Business Cycle Measurement and Analysis, No. 1; pp. 1-14. DOI 10.1787/jbcma-2013-5k43jt540lzs. Available: https://eabcn.org/sites/default/files/2023-09/business_cycle_synchronization_in_the_european_union_13-2-2013_final_0.pdf (December 2024)

Hafner, K.A.; Jager, J. (2013). The Optimum Currency Area Theory and the EMU. Intereconomics – Review of European Economic policy, Vol. 48, No 5, pp. 315–322. ZBW – Leibniz Information Centre for Economics & CEPS – Centre for European Policy Studies. DOI: 10.1007/s10272-013-0474-7. Available: https://www.intereconomics.eu/contents/year/2013/number/5/article/the-optimum-currency-area-theory-and-the-emu.html (November 2024)

Haynes, Ph.; Alemna, D. (2023). Convergence Trends in Euro Economies: Financial Crisis Recovery and the COVID-19 Pandemic. Economies, Vol. 11: 284, Special Issue: International Financial Markets and Monetary Policy 2.0 (ed. Czudaj, R.). Basel, Switzerland. Available: https://doi.org/10.3390/economies11110284 (March 2025)

Hošoff, B.; Blažo, O.; Hvozdíková, V.; Kiššov, S.; Kováčiková, H.; Sipko, J. (2022). (Sur)reality of integration and real convergence in the European Union: Economic and legal context – First edition. Bratislava: Comenius University in Bratislava, Faculty of Law, ISBN 978-80-7160-674-1

Iancu, A. (2009). Nominal Convergence, Working Papers, No. 090602, Romanian Academy, National Institute for Economic Research (INCE - CIDE), Bucharest (Romania). Available: https://www.econstor.eu/bitstream/10419/110428/1/wpince090602.pdf (November 2024)

IMF - External Relations Dept. (1984). The realities of economic interdependence: Its benefits and frustrations. Finance & Development, Vol. 21, Issue 1 (March 1984). International Monetary Fund. ISBN: 9781616353568; ISSN: 0015-1947. DOI: https://doi.org/10.5089/9781616353568.022 (December 2024)

Issing, O. (2005). European integration – achievements and challenges. Workshop on “What effects is EMU having on the euro area and its member countries” (16 June 2005). European Central Bank. Available: https://www.ecb.europa.eu/press/key/date/2005/html/sp050616_1.en.html (January 2025)

Kandžija, V.; Cvečić, I. (2010). Ekonomika i politika Europske unije. Rijeka: Ekonomski fakultet Sveučilista u Rijeci. ISBN 953-6148-99-8.

Kenen, P.B. (1969). The Theory of Optimum Currency Areas: An Eclectic View, in: Mundell, R.A.; Swoboda A. (eds.): Monetary Problems of the International Economy, Chicago, University of Chicago Press, pp. 41-60.

Kesner – Škreb, M. (2006). Kriteriji konvergencije. In: Financial Theory and Practice, vol. 30 (4), pp. 407-408. Available: https://hrcak.srce.hr/file/16014 (November 2024)

Krugman, P. (1993). Lessons of Massachusetts for EMU. In: Giavazzi, F. (ed.), Adjustment and Growth in the European Monetary Union. Cambridge: Cambridge University Press; pp. 241-261. Available: https://doi.org/10.1017/CBO9780511599231.016 (January 2025)

Krugman, P. (2013). Revenge of the Optimum Currency Area. In: Acemoglu; D. et all. (ed.), NBER Macroeconomics Annual 2012, Volume 27. National Bureau of Economic Research; pp. 439-448. University of Chicago Press. ISBN 0-226-05280-X. DOI 10.1086/669188. Available: https://www.nber.org/books-and-chapters/nber-macroeconomics-annual-2012-volume-27/revenge-optimum-currency-area (January 2025)

Krugman P.; Venables, A.J. (1996). Integration, specialization, and adjustment. European Economic Review, vol. 40, Issues 3–5, pp. 959-967. ISSN 0014-2921; https://doi.org/10.1016/0014-2921(95)00104-2 (https://www.sciencedirect.com/science/article/pii/0014292195001042) (January 2025)

Lane, P.R. (2000). Asymmetric Shocks and Monetary Policy in a Currency Union. The Scandinavian Journal of Economics, vol. 102, No. 4, pp. 585–604. Available: http://www.jstor.org/stable/3440810 (December 2024)

Licchetta, M.; Mattozzi, G. (2023). Convergence in GDP per Capita in the Euro Area and the EU at the Time of COVID-19. Economic Convergence. Intereconomics: ZBW – Leibniz Information Centre for Economics, Vol. 58, No 1, pp. 43-51. DOI: 10.2478/ie-2023-0012

Lucas, R.E. (1988). On the mechanics of economic development. Journal of Monetary Economics, Vol. 22, Issue 1, pp. 3-42. ISSN 0304-3932. Available: https://doi.org/10.1016/0304-3932(88)90168-7 (https://www.sciencedirect.com/science/article/pii/0304393288901687) (January 2025)

Mankiw, N.G.; Romer, D.; Weil D.N. (1992). A Contribution to the Empirics of Economic Growth. Quarterly Journal of Economics. Vol. 107 (May), pp. 407–437. Available: https://eml.berkeley.edu/~dromer/papers/MRW_QJE1992.pdf (January 2025)

Martín, C.; Velázquez, F.J.; Funck, B. (2001). European Integration and Income Convergence – Lessons for Central and Eastern European Countries. World Bank technical paper, No. WTP 514. The World Bank; Washington, D.C. (USA). Available: http://documents.worldbank.org/curated/en/138451468771569674 (December 2024)

McKinnon, R.I. (1963). Optimum Currency Areas. in: American Economic Review, Vol. 53, No. 4, pp. 717-725.

Mink, M.; Jacobs, J.P.A.M.; de Haan, J. (2012). Measuring coherence of output gaps with an application to the euro area. Oxford Economic Papers, Vol. 64, Issue 2 (April 2012), pp. 217–236. Available: https://doi.org/10.1093/oep/gpr049 (March 2025)

Miron, D.; Holobiuc, A.M.; Cojocariu, R.C.; Budacia, A.E. (2022). Real Convergence in the Euro Area: Mirage or Reality? Journal of Competitiveness, vol. 14, No 1, pp. 100–117. Available: https://doi.org/10.7441/joc.2022.01.06 (March 2025)

Mucha-Leszko, B.; Kakol, M.K. (2021). Does Poland’s Economy Meet the Criteria of Real Convergence with the Euro Area?, Journal of Eastern Europe Research in Business and Economics, Vol. 2021, Article ID 492695, IBIMA Publishing, DOI: 10.5171/2021.492695

Mundell, R.A. (1961). A Theory of Optimum Currency Areas. in: American Economic Review, Vol. 51, No. 4, pp. 657-665.

Mundell R. (2002). Contribution to HM Treasury (2003). Submissions on EMU from leading academics: EMU study. Discussion paper No. 2979 (September 2001); Center for Economic Policy Research, HM Treasury (London, UK). Available: https://eml.berkeley.edu/~eichengr/links/submissions.pdf (March 2025)

Obadić, A.; Arčabić, V.; Rogić Dumančić, L. (2022). Club convergence of labor market institutions in the European Union. Economic Analysis and Policy, vol. 77 (March 2022), pp. 876-896. Economic Society of Australia, Queensland (Australia); Elsevier B.V. https://doi.org/10.1016/j.eap.2022.12.021 (https://www.sciencedirect.com/science/article/abs/pii/S0313592622002296?via%3Dihub) (March 2025)

OECD (n.d.). Investment (GFCF). Organisation for Economic Co-operation and Development: Data / Indicators. Available: https://www.oecd.org/en/data/indicators/investment-gfcf.html (January 2025)

Oyadeyi, O. (2024). Monetary Integration Across West Africa: Is the Region Ripe for a Monetary Union? SAGE Open (April-June 2024): Vol. 14, No 2, pp. 1–21. DOI: 10.1177/21582440241242958. Available: https://journals.sagepub.com/doi/full/10.1177/21582440241242958 (February 2025)

Pacheco, L.M. (2000). Fiscal Federalism, EMU and Shock Absorption Mechanisms: A Guide to the Literature. European Integration online Papers (EIoP), Vol. 4 (2000), N° 4. Available: http://eiop.or.at/eiop/texte/2000-004a.htm (October 2024)

Patterson, B.; Amati, S. (1998). Adjustment to Asymmetric Shocks – Working Paper. Economic Affairs Series ECON-104, European Parliament - Directorate-General for Research. Available: https://www.europarl.europa.eu/workingpapers/econ/pdf/104_en.pdf (January 2025)

Peersman, G. (2007). The Relative Importance of Symmetric and Asymmetric Shocks: the Case of United Kingdom and Euro Area. Working Paper, No. 136, Oesterreichische Nationalbank (OeNB), Vienna (Austria). Available: https://www.econstor.eu/bitstream/10419/264728/1/oenb-wp-136.pdf (February 2025)

Pisani-Ferry, J. (2021). The Euro at 20. Project Sindicate: Economics. Available: https://www.project-syndicate.org/commentary/euro-twenty-years-track-record-and-future-prospects-by-jean-pisani-ferry-2021-12 (January 2025)

Report Macdougall (1977). Report of the Study Group on the Role of Public Finance in European Integration, EC economic and financial series, n. A13 e B13

Romer, P. M. (1986). Increasing Returns and Long-Run Growth. Journal of Political Economy, vol. 94, No 5, pp. 1002–1037. Available: http://www.jstor.org/stable/1833190 (January 2025)

Rosati, D.K. (2017). Asymmetric Shocks in the Euro Area: Convergence or Divergence? International Journal of Management and Economics, Vol. 53, Issue 3 (July–September 2017), pp. 7–25. DOI: 10.1515/ijme-2017-0016. Available: https://sciendo.com/article/10.1515/ijme-2017-0016 (January 2025)

Schipor, G-L. (2020). Euro Adoption in Romania: An Exploration of Convergence Criteria. “Ovidius” University Annals, Economic Sciences Series, Vol. XX, Issue 2. Available: https://stec.univ-ovidius.ro/html/anale/RO/wp-content/uploads/2021/03/Section%202/17.pdf (March 2025)

Schipor, G-L.; Duhnea, C. (2022). The Assessment of the Convergence Criteria in Romania, on the Path Towards Euro Adoption. Acta academica karviniensia, Vol. XXII(1), pp. 121-134. DOI: 10.25142/aak.2022.010. Available: https://aak.slu.cz/pdfs/aak/2022/01/10.pdf (March 2025)

Solow, R. (1956). A contribution to the theory of economic growth. Quarterly Journal of Economics, Vol. 70, No 1, pp. 65-94.

Solow, R.M.; Swan, T.W. (1956). Economic Growth and Capital Accumulation. Economic Record, vol. 32, pp. 334-361. Available: https://doi.org/10.1111/j.1475-4932.1956.tb00434.x (January 2025)

Spolaore, E. (2016). The Economics of Political Borders. In: Economics Analysis of International Law, (ed. Kontorovich, E.; Parisi, F.), Edward Edgar Publishing, Cheltenham, UK (Research Handbooks in Law and Economics series). Print ISBN: 9780857930156; eISBN: 9780857930163. DOI: https://doi.org/10.4337/9780857930163.00007 (January 2025)

Spolaore, E.; Wacziarg, R. (2002). Borders and Control. NBER Working Paper Series. National Bureau of Economic Research, NBER Working Paper No. 9223, Cambridge (MA, USA). DOI 10.3386/w9223. https://www.nber.org/papers/w9223 (January 2025)

Steinert, F.N.; Althammer, W. (2025). The endogeneity of optimum currency areas in light of pan-European intra-industry trade patterns and business cycle synchronicity. Empirica, vol. 52, pp. 121–142. https://doi.org/10.1007/s10663-024-09631-1 (March 2025)

Stoykova, O. (2018). Optimum Currency Areas: Theory and application. Myśl Ekonomiczna i Polityczna 4(63), pp. 17–53. DOI: 10.26399/meip.4(63).2018.43/o.stoykova

Szegedi, L.; Teleki, B. (2024). EU Law on Public Finance Rules. In: Nagy, Z. (ed.) Economic Governance. The Impact of the European Union on the Regulation of Fiscal and Monetary Policy in Central European Countries. Central European Academic Publishing., Miskolc–Budapest. pp. 27–50. ISSN 2786-2518. Available: https://doi.org/10.54237/profnet.2024.znecogov_1 (February 2025)

Theodoropoulos, S. (2005). Asymmetric Shocks, Structural Rigidities and Adjustment Capability in EMU - A Review. European Research Studies, Volume VIII, Issue (3-4); pp 3-20. Available: https://ersj.eu/repec/ers/papers/05_p1.pdf (March 2025)

Todorov, I. (2024). Is Bulgaria Ready to Join the Euro Area – Income Convergence or Similarity of Shocks Criteria? Yearbook of UNWE (2023), Publishing House – University of National and World Economy, Sofia, Bulgaria. ISSN (print): 1312-5486; ISSN (online): 2534-8949. DOI: https://doi.org/10.37075/YB.2023.2.05. Available: https://www.unwe.bg/doi/yearbook/2023.2/YB.2023.2.05.pdf (March 2025)

Tokarski, P. (2019). Divergence and Diversity in the Euro Area: The Case of Germany, France and Italy. SWP Research Paper, No 6 (May 2019), German Institute for International and Security Affairs - SWP, Berlin. Available: https://www.swp-berlin.org/10.18449/2019RP06/ (January 2025)

UNCTAD (2023). Productive Capacities Index: 2nd Generation - Enhanced Statistical and Methodological Approach with Results (UNCTAD/ALDC/2023/2). Available: https://unctad.org/publication/productive-capacities-index-2nd-generation (March 2025).

Uzawa, H. (1963). On a Two-Sector Model of Economic Growth II. The Review of Economic Studies, Vol. 30, Issue 2 (June 1963), pp. 105–118, Available: https://doi.org/10.2307/2295808 (January 2025)

Walko, Z. (2022). Ready for the euro? The case of Croatia and Bulgaria. Occasional Paper series, No 3 (June 2022), Oesterreichische Nationalbank, Vienna (Austria). Available: https://www.oenb.at/dam/jcr:3323a25c-3eff-48a0-ab3e-da88150fe744/occasional_paper_no-3_ready-for-the-euro.pdf (March 2025)

Wieser, Th.; Grieveson, R.; Holzner, M. (2024). A Stronger CEE for a Stronger Europe. Policy Notes and Reports 79, The Vienna Institute for International Economic Studies – WIIW. Vienna (Austria). Available: https://wiiw.ac.at/p-6916.html (March 2025)

World Bank (2025). World Development Indicators (WDI). DataBank: World Bank Group. Available: https://databank.worldbank.org/source/world-development-indicators/Series/NE.GDI.FTOT.ZS# (May 2025)

WTO (2021). World Trade Report 2021: Economic resilience and trade. World Trade Reports, World Trade Organization, November 2021 edition. ISBN: 9789287051400. DOI: https://doi.org/10.30875/9789287051400 (December 2024)

Young, A.; Higgins, M.; Levy, D. (2008). Sigma Convergence versus Beta Convergence: Evidence from U.S. County-Level Data, Journal of Money, Credit and Banking, vol. 40, issue 5, pp. 1083-1093. Available: https://EconPapers.repec.org/RePEc:mcb:jmoncb:v:40:y:2008:i:5:p:1083-1093 (January 2025)