“…Studies using macroeconomic data are more often in line with Oswald (e.g. Partridge and Rickman, 1997;Pehkonen, 1997;Nickell, 1998;Nickell et al 2005;Cochrane and Poot, 2007), although various researchers obtain dissident or insignificant results (Flatau et al, 2002;Barrios Garia andHernandez, 2004, Coulson andFisher, 2009;Lerbs, 2010). Overall, it is difficult however to draw convincing conclusions from these macro studies due to their imperfect or limited econometric setup.…”