Ideological scales derived from policy position items are prevalent in political psychology and behavioral research. However, the underlying spatial assumptions of these scales are rarely scrutinized. This study investigates how assumptions about the dimensionality of the latent ideological space can significantly impact empirical estimates, even when using the same data from the same respondents. Through a comprehensive literature review and statistical simulations using data from the ANES, we demonstrate that the optimal number of latent ideological dimensions increases without bound as researchers include additional items for analysis...
This paper examines the concept career politician. It seeks to clarify, systematize, and measure this ambiguous multidimensional concept in order to facilitate testing theories and hypotheses associated with it. We argue that career politicians are full-time politicians who lack significant experience in the wider world and have other distinguishing attributes for which they are both appreciated and criticized. From claims and critiques put forward by political scientists, journalists, publics, and politicians, we extract four principal dimensions...