“…However, recent evidence has cast serious doubts concerning the robustness of the relationship. If data up to 2001 are used, standard money demand functions for the euro area can be firmly established, see Fagan and Henry (1998), Funke (2001), Coenen and Vega (2001), Bruggemann et al (2003), Brand and Cassola (2004) and Holtemö ller (2004a,b). Extending the sample to a more recent period destroys these findings, as cointegration between the variables cannot be detected anymore, see Gerlach and Svensson (2003), Carstensen (2006) and Greiber and Lemke (2005).…”