Why Iowa? Because the rules matter -- What we know and what we don't about presidential nomination campaigns -- Iowa caucus rules -- Candidate campaigns in Iowa: grassroots or mass media politics? -- The Iowa grass roots: participation in the 2008 caucuses -- Decided by the few: are the Iowa caucuses representative? / with Daniel C. Bowen -- Effects of Iowa and new Hampshire in U.S. presidential nomination contests 1976-2008 / with Rob Hunsaker -- The micro foundations of momentum -- Participation and engagement in 2008 caucuses and primaries / with William W. Franko -- Reforming the presidential nomination process / with Daniel C. Bowen -- Why Iowa? Continuity and change in presidential nominations