UCLA anthropologist Alessandro Duranti presents "Improvisation: Degrees of Creativity and Social Control Across Cultural Contexts." Building on data collected during a course on jazz aesthetics taught with jazz guitarist Kenny Burrell, as well as extensive participant-observations and video recordings of contexts in which musical or verbal improvisation is practiced and sometimes discussed, Duranti identifies a number of universal dimensions of improvisation and demonstrates that improvisation is both ubiquitous and regulated by culture and context-specific expectations. Duranti is professor of anthropology and dean of social science at UCLA.