In this course, we will look at morphosyntactic word-building phenomena and the grammatical processes that underlie them, such as Head Movement, Lowering, Merger, etc. We will survey recent approaches to such head displacement operations and evaluate them against a crosslinguistic typology. We will ask the following questions about head displacement (among others): 1) How does it interact with syntactic processes like phrasal movement or ellipsis? 2) Is it syntactic, post-syntactic, both? 3) What locality constraints is it subject to? 4) What is its relationship with do-support and other types of periphrasis?