Financing the 2004 Election, edited by David Magleby, Anthony Corrado, and Kelly Patterson. This book is part of the definitive series published after each presidential election discussing campaign financing on the presidential, congressional, and state and local levels.
David Schleicher, “Politics as Markets” Reconsidered: Natural Monopolies, Competitive Democratic Philosophy and Primary Ballot Access in American Elections, 14 Supreme Court Economic Review 163 (2006).