The design of the study
The third chapter discusses the case selection of the study and more broadly, its research design. As the subtitle of the book already indicates, two cases are selected here: France (FN) and the Netherlands (PVV). These different cases are highly interesting as they allow pin-pointing the key differences between and similarities among types of radical right-wing voters across various national contexts, as well as improving the specificity and validity of the causal claims. In terms of the research design, the remainder of the chapter follows the same structure as the previous theory chapter, Chapter 2. Accordingly, it first discusses the data and methods used in the supply-side-oriented part of the book, which relies on a content analysis of the tweets of Marine Le Pen and Geert Wilders. The demand-side-related part, by contrast, relies on multiple data sources and methods. This chapter explains why a sequential mixed-methods approach is followed, using multiple correspondence analysis (MCA) to investigate the structural heterogeneity among radical right voters and life-history interviews to assess ideal-typical forms of radical right support within this structural heterogeneity.