The introductory chapter to this volume presented a number of theories and hypotheses on the determinants of endogamy; the following chapters described endogamy in different historical settings and tested some of those hypotheses. The tests looked especially at the effects of individual characteristics of spouses, and sometimes of their parents. Results relating to changes in macro characteristics over time and their effect on the likelihood of endogamy were presented. Because all these chapters refer to only one country or region, regional comparisons are seldom made (there are some exceptions: Bras and Kok on differences between parts of the province of Zeeland; Pélissier et al. on differences between rural and urban areas, and Van de Putte et al. on differences between several Belgian cities and villages).