Same as Fig. 11, with two new data sets (thick symbols) for stars with high [α/Fe] (filled squares) and low [α/Fe] (open circles) from Tan & Zhao (2011); all other data of Fig. 11 are displayed as dots. The thin solid curves correspond to the “standard” model presented in Fig. 11, while the thick dotted curves to a model with reduced SF efficiency and the thick dashed curves to a model with reduced SF efficiency and reduced escape length Λ for GCR (see text).