The Ph.D. program in Linguistics at Penn embraces a wide range of theoretical specializations and methodologies. What unites them is a commitment to careful and explicit formal analysis of the human capacity for learning and using language. The core of our program is the formal generative tradition, but we encourage the cross-fertilization that results from the confrontation of empirical and theoretical perspectives on language structure. By our close collaboration with other programs (such as computer science and psychology) we promote an awareness of the broad view of language that interdisciplinary study induces. In addition to broad training, students are offered and expected to master the methods and results of their chosen areas of concentration in linguistics as a prerequisite to fruitful engagement in dialogue with others, both within and outside the program.