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A Tide that Lifts Some Boats: Assessing the Macroeconomic Effects of EU Enlargement

  • Joe Maganga Zonda ORCID logo , Chang-Ching Lin und Ming-Jen Chang EMAIL logo
Veröffentlicht/Copyright: 14. November 2023

Abstract

Based on two-country scenarios (entrants vs. incumbents), this paper employs the synthetic control method to quantify the macroeconomic effects of the European Union (EU) enlargement, and examines whether these effects varied before, during, and after economic crises. We find that enlargement effects are very complex, and significantly varied across economic cycles and the country groups. In particular, EU enlargement induced large and positive effects on the entrants which were merely stifled in the wake of the financial crisis and the subsequent euro crisis. In the interim, the 2004 enlargement triggered an instantaneous negative shock on the incumbents which was further exacerbated by the crises. Subsequently, the entrants recovered beyond their pre-crises gains, registering approximately 14 % higher per capita incomes by 2019, with Poland emerging as a clear winner. Meanwhile, incumbents’ per capita incomes have, on average, declined by approximately 9 %. While our findings largely support the notion that the entrants are en route to catching up with their incumbent counterparts, a formal β-convergence analysis exploiting the observed and synthetic data intuitively confirms that EU integration reduces the half-life by 50 %.

JEL Classification: C21; E30; E60; F15

Corresponding author: Ming-Jen Chang, Department of Economics, National Dong Hwa University, Hualien, Taiwan, E-mail:

Acknowledgements

We are grateful to the Managing Editor (Arpad Abraham) and the two anonymous referees for their valuable comments and suggestions. We specially thank Chih-Sheng Hsieh, Te-Fen Lo, Yu-Li Wang, Shou-Yung Yin, Dinarti Tarigan, Damiana Simanjuntak, Dang-Long Bui, Van Chung Dong, participants of the 2021 Taiwan Economics Association Annual Conference, the 2021 Taiwan Macroeconometric Modelling Workshop, and the seminar participants at National Dong Hwa University, for thoughtful comments and discussions. Diana Carrillo, Ethel Hara, and Hope Banda are gratefully acknowledged for proofreading the manuscript. This work builds upon the research presented in the first author’s Ph.D. dissertation, and we are grateful to the committee for their constructive feedback. All remaining errors are our own responsibility.

Appendix A.1

This Appendix describes the data employed in the analysis and provides their sources.

Table A.1:

Variable description and data sources.

Variable name Variable definition Data source
Pop Total population Penn World Trade 10.0
rgdp Real GDP (at constant 2017 national prices) Penn World Trade 10.0
Im Imports of goods and services (at constant 2015 US$) UNCTADstat
Ex Exports of goods and services (at constant 2015 US$) UNCTADstat
Fdi Per capita FDI inflow UNCTADstat
public_debt Public debt (% of GDP) AMECO
competitiveness Real unit labour cost (2015 index base) AMECO
Tfp Total factor productivity (USA = 1) Penn World Trade 10.0
Unemp Total unemployment (% of total labor force) World Development Indicators
labour_mobility Net migration (% of total population) World Development Indicators
csh_a Share of agriculture in value added World Development Indicators
csh_c Share of private consumption (% of GDP) World Development Indicators
csh_g Share of government consumption (% of GDP) World Development Indicators
csh_i Share of investment (% of GDP) World Development Indicators
csh_ind Share of industry in value added World Development Indicators
enrol_pr Primary gross school enrolment World Development Indicators
enrol_ sec Secondary gross school enrolment World Development Indicators
  1. Notes: csh_a, csh_c, csh_g, csh_i, enrol_pr, enrol_sec and population growth rate series are used as covariates for per capita GDP. For the other outcome variables, we used the lagged values of the pre-accession endogenous variable as predictors.

Appendix A.2

This Appendix provides the donor pool contribution to the construction of each of synthetic controls.

Table A.2:

Donor weights: GDP per capita.

Treated unit Donor pool
Cyprus Albania (0.283); Australia (0.115); Canada (0.219); Israel (0.034);
Korea (0.350).
Czech Albania (0.227); Chile (0.034); Japan (0.353); Korea (0.252);
Montenegro (0.025); New Zealand (0.109).
Estonia Korea (0.543); Montenegro (0.061); Serbia (0.396).
Hungary Albania (0.088); Australia (0.210); Canada (0.015); China (0.120);
Korea (0.061); New Zealand (0.012); Russia (0.209); Serbia (0.284).
Latvia Iceland (0.014); Korea (0.221); Russia (0.067); Serbia (0.697).
Lithuania Australia (0.050); Korea (0.069); Montenegro (0.133); Russia (0.180);
Serbia (0.568).
Malta Canada (0.011); Israel (0.165); Korea (0.016); Norway (0.072);
Serbia (0.526).
Poland Argentina (0.069); Montenegro (0.220); Norway (0.101); Serbia (0.611)
Slovakia Australia (0.170); China (0.471); Chile (0.175); Montenegro (0.185).
Slovenia Australia (0.176); Iceland (0.036); Korea (0.175); Montenegro (0.006);
Norway (0.093); Serbia (0.513).
Bulgaria Albania (0.052); China (0.166); Colombia (0.405); Indonesia (0.014);
Korea (0.022); Russia (0.253); Turkey (0.091).
Romania China (0.228); Chile (0.203); Indonesia (0.123); Korea (0.101);
Russia (0.232); Turkey (0.113).
Croatia Iceland (0.320); Indonesia (0.050); Montenegro (0.409); Serbia (0.221).
Austria Albania (0.132); Australia (0.034); Canada (0.295); Iceland (0.022);
Norway (0.065); Switzerland (0.164); United States (0.288).
Belgium Argentina (0.033); Canada (0.523); Indonesia (0.171); Israel (0.039);
Macedonia (0.004); Norway (0.098); Switzerland (0.091); Turkey (0.006);
United States (0.034).
Denmark Canada (0.035); Israel (0.400); New Zealand (0.095); Norway (0.302);
Switzerland (0.115); United States (0.053).
Finland Iceland (0.427); Norway (0.193); Korea (0.379).
France Albania (0.210); Australia (0.111); Canada (0.192); Iceland (0.039);
India (0.001); Israel (0.163); Norway (0.008); Switzerland (0.272);
United States (0.003).
Germany Albania (0.003); Brazil (0.238); Israel (0.158); Norway (0.053);
New Zealand (0.111); Switzerland (0.438).
Greece Australia (0.438); Korea (0.083); Montenegro (0.012); Russia (0.280);
Serbia (0.187).
Italy Albania (0.154); Israel (0.270); Japan (0.043); Korea (0.057);
Norway (0.166); Switzerland (0.309).
Netherlands Iceland (0.613); Norway (0.320); Switzerland (0.044); United States (0.023).
Portugal Iceland (0.431); Indonesia (0.107); Israel (0.303); Montenegro (0.054);
Norway (0.022); Serbia (0.048); Turkey (0.034).
Spain Albania (0.052); Australia (0.084); Canada (0.207); Iceland (0.424);
Israel (0.019); Korea (0.159); Switzerland (0.029); Russia (0.026).
Sweden Canada (0.453); Iceland (0.234); Korea (0.182); Norway (0.132).
United Kingdom Argentina (0.009); Australia (0.512); Canada (0.129); Iceland (0.192);
Korea (0.143); Russia (0.013).
  1. Notes: Potential control units included all the 27 countries in the original donor pool except Saudi Arabia which did not have data for the covariates. For each treated country, the rest of the donor units not appearing in this table received zero weights.

Appendix A.3

This Appendix provides the estimations for the EU-13 membership on their per capita GDP. Particularly, in this exercise, we set each individual incumbent’s own EU accession date as the treatment year so as to demonstrate how different such an effect is from the 2004-eastern enlargement shock. Thus, for this exercise, we set 1957 for the founding members (Belgium, Germany, France, Italy, the Netherlands); 1973 for the first enlargement members (Denmark, and the United Kingdom); 1981 for Greece; 1986 for the third enlargement states (Spain and Portugal); and 1995 for the fourth enlargement members (Austria, Finland and Sweden).

Table A.3:

Effects of EU incumbents’ membership on their own per capita GDP.

AUT BEL DNK FIN FRA DEU GRC ITA NLD PRT ESP SWE GBR
τ 2009 6.07 12.03 5.62 13.19 −0.59 3.55 −15.68 13.11 6.66 18.33 4.78 7.24 17.30
τ 2019 2.95 8.73 8.08 5.92 −3.35 7.11 −37.66 −2.60 1.82 17.50 −2.68 9.95 11.04
  1. Notes: τ 2009 and τ 2019, respectively, capture the cumulative effect of EU membership as the percentage discrepancy between the treated unit and its synthetic control in 2009 and at the end of the study period—2019.

Appendix A.4

This Appendix presents the results from the MC and partially pooled SCM estimations.

Figure A.4: 
MC estimator: ATE of the 2004 enlargement on real GDP per capita (in thousand US$). Notes: the ATE is bounded within 90 % confidence intervals.
Figure A.4:

MC estimator: ATE of the 2004 enlargement on real GDP per capita (in thousand US$). Notes: the ATE is bounded within 90 % confidence intervals.

Figure A.5: 

Partially pooled SCM: effects of the 2004 enlargement on real GDP per capita (in thousand US$). Notes: the ATE is bounded within 90 % confidence intervals.
Figure A.5:

Partially pooled SCM: effects of the 2004 enlargement on real GDP per capita (in thousand US$). Notes: the ATE is bounded within 90 % confidence intervals.

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Supplementary Material

This article contains supplementary material (https://doi.org/10.1515/bejm-2023-0053).


Received: 2023-04-03
Accepted: 2023-10-02
Published Online: 2023-11-14

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