Theorizing change revisited: An amended process model of institutional innovations and changes in institutional fields.

The recent abandonment of old taxis and the introduction and diffusion of new taxis and car ride-sharing services of Uber and the sharing economy in general shows that institutional environments change. This paper provides a review on institutional change based on 29 previously published case studies. Based on this review and the Uber case an overview of antecedents for institutional change is developed. Furthermore, an existing model describing the process of institutional change (Greenwood et al., 2002) is validated and extended. This extended process model describes the development and different phases of institutional change. This paper aims to enrich our theoretical understanding of institutional change and to provide insights for change agents. [ABSTRACT FROM AUTHOR]