This is the online appendix of the dissertation: "I identify, therefore I participate. How social identification relates to the political participation among Muslim immigrant-origin individuals in Western Europe", by Maria Kranendonk. Some of the articles on which the chapters are based are published by peer-reviewed academic journals:Chapter 1: Kranendonk, M., Vermeulen, F., & van Heelsum, A. (2018). “Unpacking” the Identity‐to‐Politics Link: The Effects of Social Identification on Voting Among Muslim Immigrants in Western Europe. Political Psychology, 39(1), 43-67.Chapter 2: Kranendonk, M. (2018). The relationship between social identification and local voting, and its interplay with personal and group discrimination among the descendants of Turkish immigrants in Western Europe. Comparative migration studies, 6(1), 25.Chapter 5: Kranendonk, M., & Vermeulen, F. (2018). Group identity, group networks, and political participation: Moroccan and Turkish immigrants in the Netherlands. Acta Politica, 1-42.The link to the manuscript will also be provided in due time.