NutzungsbedingungenKey words: Mobility, per capita income, regions, European Union.JEL Code: D30, R11, R12. * The authors wish to acknowledge the financial support from MCYT (Project BEC2002-03941) and the Fundación BBVA. † Postal address: Roberto Ezcurra, Departamento de Economía, Universidad Pública de Navarra, Campus de Arrosadia s/n. 31006 Pamplona (Spain). E-mail address: roberto.ezcurra@unavarra.es.
Page 1 of 73Editorial Office, Dept of Economics, Warwick University, Coventry CV4 7AL, UK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 F o r P e e r R e v i e w
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IntroductionIn recent years, the issue of territorial imbalances in the European Union (EU) has been examined in numerous studies from a variety of different approaches 1 . There are various reasons for the amount of interest surrounding this question. Among them is the fact that economic growth theory has advanced greatly over the last two decades, coinciding with the introduction of endogenous growth models in the mid eighties. Another, the need to reduce disparities in terms of development levels across the various European regions, is directly related to some of the basic principles behind the forming of the Union, especially since the introduction of the Single Act and the Maastricht agreements. In particular, one of the specific assumptions of the European integration programme is that it will drive the growth of all Member States, thereby increasing economic and social cohesion 2 .Most of the articles dealing with the analysis of regional per capita income disparities in Europe apply the concepts of sigma convergence and beta convergence, introduced by Sala-i-Martin (1991, 1992), combining the information provided by various dispersion statistics with the estimation of convergence equations. However, as Quah (1993, 1996a, 1997) has repeatedly pointed out, not only does this approach raise a number of econometric problems, it also fails to capture a series of potentially interesting issues relating to the dynamics of the distribution in question. In particular, this type of analysis does not consider the possibility of regions modifying their relative positions over time, and thereby neglects the whole issue of intradistributional mobility.As an illustration of the relevance of questions relating to the analysis of distribution dynamics, let us consider the following example. Let us assume that we have information for a period of several years on regional incomes and populations in two given countries, 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 F o r P e e r R e v i e w A and B, each of which is in turn divided into two regions with exactly the same size of p...