- Ph.D., Princeton University, 2010
- J.D., Yale Law School, 1998
- M.Phil., University of Cambridge, 1995
- B.A., Princeton University, 1990
Christina Duffy Ponsa is the George Welwood Murray Professor of Legal History at Columbia Law School. Ponsa’s work focuses on American legal history.
Ponsa is the co-editor of Foreign in a Domestic Sense: Puerto Rico, American Expansion, and the Constitution, and the author of several articles and essays on the constitutional implications of American territorial expansion.
Ponsa is currently at work on a constitutional and international legal history of the American empire in the late 19th and early 20th centuries.
Prior to joining the Columbia Law School faculty in 2007, Ponsa served as a law clerk to Judge Jose A. Cabranes on the 2nd U.S. Circuit Court of Appeals and to Justice Stephen G. Breyer on the Supreme Court.
Ponsa holds degrees from Princeton University, the University of Cambridge, and Yale University.
- American legal history
- Constitutional law