Recent papers and preprints, all in PDF format:

On the supersingular locus of the GU(2,2) Shimura variety, joint with G. Pappas

Heights of Kudla-Rapoport divisors and derivatives of L-functions, joint with J. Bruinier and T. Yang

An expository version, based on lectures given at the Bellairs Research Institute in 2013.
Complex multiplication cycles and Kudla-Rapoport divisors II

Complex multiplication cycles and Kudla-Rapoport divisors
Annals of Math. 176 (2012), 1097-1171
Intersections of Hirzebruch-Zagier divisors and CM cycles, joint with T. Yang
Lecture Notes in Mathematics #2041 (2011).

For older papers, go to the arXiv.

Moduli spaces of CM elliptic curves and derivatives of Eisenstein series:
notes for a series of lectures given 2009 at the Morningside Center for Mathematics

This work was supported in part by NSF grant DMS-0901753.