“…With respect to her immediate subject, she draws on the relevant studies by the Max Planck Institute in Cologne (Hassel/ Höpner/ Kurdelbusch/ Rehder/ Zugehör, 2000; Streeck / Höpner, 2003;Beyer, 2003;Höpner/ Jackson, 2003;Vitols, 2003;Becker, 2003;Höpner, 2003). Surprisingly, she does not even mention the studies by Stephen Lazonick and Mary O'Sullivan on the Innovative Enterprise and on the change of corporate governance in the US and Germany (O'Sullivan, 2000a(O'Sullivan, , 2001Lazonick, 2001Lazonick, , 2004O'Sullivan, 2000b The author frequently refers to the concepts of structural and institutional theory and their central terms and mechanisms, but does not really bring to bear them in the analytical development of the argument. For example, while isomorphism is used as a key concept to explain corporate change following Powell/DiMaggio (1983), this is done at the expense of abandoning internal differentiation within this category: "The theory of this study amounts to saying that forced, mimetic and normative isomorphism works jointly in such a way that one cannot distinguish their effects empirically.…”