“…As discussed by Obstfeld and Peri (1998) previous research documents this finding adding that, in general, relative regional prices tend to fluctuate less than international prices ( Vaubel, 1976 , Vaubel, 1978 , Eichengreen, 1991 , De Grauwe and Vanhaverbeke, 1993 ). In addition, the relative insufficient degree of prices and wages flexibility in Europe is suggested by recent studies, such as Arpaia and Pichelmann, 2007 , Heinz and Rusinova, 2011 . Arpaia and Pichelmann (2007) suggest that long-lasting cross-country differences in labor cost and wage dynamics in the euro area reflect weak wage flexibility, rather than a mechanism of adjustment between countries.…”