“…By contrast, institutional drift (Oliver, 1992) focuses more on the gradual changes in institutions that occur as performance slips and meanings shift over time (see for example, Zilber, 2002). Institutional entrepreneurship , diffusion (Kennedy & Fiss, 2009;Lounsbury, 2001;Purdy & Gray, 2009), and the influence of field-configuring events (Garud, 2008;Lampel & Meyer, 2008), which provide a context for interaction between hitherto unconnected parties (Glynn, 2008), have all been implicated in endogenous change processes. Indeed, by emphasizing issue fields, what might otherwise be seen as exogenous (e.g., activist pressure) becomes endogenous, as new actors enter issue fields when they engage with exchange field members to pressure for change on a particular issue.…”