Two economics professors who set out to measure the influence of early primaries and caucuses on the electoral process found that states like Iowa and New Hampshire may have a disproportionate influence on who gets elected. They write that the "overweighting of early voters ... represents a deviation from the democratic ideal of 'one person, one vote.'" Michele Norris talks with Brian Knight, associate professor of economics at Brown University, about his paper, co-written with Nathan Schiff. It's called "Momentum and Learning in Presidential Primaries."