ion is necessary for broad explanatory power (Hedström and Swedberg 1998:10, 13; Kiser and Hechter 1991). 13 The mechanisms that cause ascriptive inequality to vary do not include abstract or global phenomena such as devaluation, discrimination, exclusion, exploitation, meritocracy, oppression, and social closure that describe but do not explain patterns of inequality (e.g., Reskin 1988; Tomask...