chapter 1 Variables and relations -- chapter 2 Notions of structure -- chapter 3 Processes and process frames -- chapter 4 Functional models -- chapter 5 Functional causality -- chapter 6 Models and statistical data -- chapter 7 Models with event variables -- chapter 8 Multilevel and...

The article discusses a distinction between factual and modal notions, and corresponding generalizations, in social research. The discussion starts from the suggestion, made by Charles Ragin, that theoretical statements in social research most often can be formulated as statements about sets of...