You are here

Sage online ordering services are currently unavailable due to network disruption. We are working to restore service as soon as possible. In the meantime, our books are still available widely via retailers and online from Currently we are only able to supply digital inspection copies. These can be requested via this site, or direct from Vitalsource and Kortext. If you need a print copy, please contact your local Academic Sales Consultant, who will be able to arrange to send this once our systems are back online.

If you need further assistance please visit our Contact us page for further information. Thank you for your patience and we apologise for the inconvenience.

Jonathan Michael Kropko University of Virginia, USA

Jonathan Kropko is a professor in the Department of Politics at the University of Virginia, where he also serves on the steering committee of the Quantitative Collaborative, an interdisciplinary research initiative for applied statistics in the social sciences. Previously, he held a postdoctoral research fellowship  at the Applied Statistics Center at Columbia University and was a statistics consultant at the H. W. Odum Institute for Research in the Social Sciences at the University of North Carolina. He holds degrees in mathematics (BS) and political science (BA) from Ohio State University, and earned a PhD in political science from the University of North Carolina in 2011. He is a specialist in political methodology, with a focus on missing data imputation, time series, and measurement methods.