... significance at the a = 1%, 5% and 10%respectively.Standard errors in parenthesis.von der Schulenburg et al . Health Economics Review 2011, 1:18http://www.healtheconomicsreview.com/content/1/1/18Page ... Schulenburg et al . Health Economics Review 2011, 1:18http://www.healtheconomicsreview.com/content/1/1/18Page 5 of 8substitution, regressive pharmacy mark-ups, claw-backs and the use of c ost ... et al . Health Economics Review 2011, 1:18http://www.healtheconomicsreview.com/content/1/1/18Page 8 of 8considered for the purpose of the analysis (Denmark,France, German y, Netherlands, S...