The  NYU Journal of Law & Business has published The Future of Fannie and Freddie (also on SSRN):

This is a transcript of a panel discussion titled, “The Future of Fannie and Freddie.” The panelists were Dr. Mark Calabria from the Cato Institute; Professor David Reiss from Brooklyn Law School; Professor Lawrence White from NYU Stern School of Business; Dr. Mark Willis from NYU’s Furman Center for Real Estate and Urban Policy. The panel was moderated by Professor Michael Levine from NYU School of Law. Panelists looked at economic policy and future prospects for Fannie and Freddie. My remarks focused on the goals of housing finance policy.

The actual panel occurred some time ago, but it remains current given the limbo in which housing finance reform finds itself.