This is an introduction to a vast and multifaceted domain of inquiry. Due to time limitations, this course will touch lightly on many important topics, and neglect others entirely; its design resembles more a map than an encyclopedia. Also, given the focus on theoretical matters, methodological issues will move to the background. Empirical material will be used to illustrate how knowledge is produced from a particular standpoint and trying to answer particular questions, leaving the bulk of the discussion on quantitative and qualitative procedures to seminars such as 15.347, 15.348, and the like.
*Some translations represent previous versions of courses.