<ItemContent> The spatial location of candidates is important in determining the pattern of campaign contributions. Many PACs and all PAC types, except agricultural cooperatives, contribute in a manner highly consistent with a simple spatial model. There is little giving by an individual PAC to candidates at...</itemcontent>

This paper shows a variety of evidence that members of Congress are ideologically consistent. Based upon the roll call voting record, once elected to Congress, members adopt a consistent ideological position and maintain it over time. There may be changing minds, but they are not in Congress....

This paper presents a software package designed to estimate Poole and Rosenthal W-NOMINATE scores in R. The package uses a logistic regression model to analyze political choice data, usually (though not exclusively) from a legislative setting. In contrast to other scaling methods, W-NOMINATE...