caa a22 4500 60616863X CHVBK 20210128100707.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s11127-015-0289-0 doi (NATIONALLICENCE)springer-10.1007/s11127-015-0289-0 The Jeffords switch and legislator rolls in the U.S. Senate [Elektronische Daten] [Chris Den Hartog, Nathan Monroe] On May 24, 2001 United States Senator James Jeffords announced that he was switching from Republican to independent and would vote with Democrats on organizational matters (i.e. votes deciding party membership and majority party status), effectively taking majority party control of the Senate from the Republicans and giving it to the Democrats. This created an unusually well controlled quasi-experimental opportunity for learning about the role of parties in the Senate—it held most important variables constant while one variable, majority status, changed. We use roll call data to evaluate the probability of individual members of each party being rolled on Senate final passage votes, before and after the switch. We find that, contrary to conventional wisdom on the Senate, majority status is an important factor in Senate decision-making. Our results show that Republicans were more likely to be rolled after the switch than they had been before, and that Democrats were less likely to be rolled than they had been before. Springer Science+Business Media New York, 2015 U.S. Senate nationallicence Congress nationallicence Parties nationallicence Jeffords nationallicence Natural experiment nationallicence Den Hartog Chris Department of Political Science, California Polytechnic State University, 93407, San Luis Obispo, CA, USA aut Monroe Nathan School of Social Science, Humanities, and Arts, University of California, Merced, 95211, Merced, CA, USA aut Public Choice Springer US; http://www.springer-ny.com 165/1-2(2015-10-01), 25-43 0048-5829 165:1-2<25 2015 165 11127 https://doi.org/10.1007/s11127-015-0289-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11127-015-0289-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Den Hartog Chris Department of Political Science, California Polytechnic State University, 93407, San Luis Obispo, CA, USA aut NATIONALLICENCE 700 1- Monroe Nathan School of Social Science, Humanities, and Arts, University of California, Merced, 95211, Merced, CA, USA aut NATIONALLICENCE 773 0- Public Choice Springer US; http://www.springer-ny.com 165/1-2(2015-10-01), 25-43 0048-5829 165:1-2<25 2015 165 11127