Before revision: Notable recent theorists include Baumgartner and Jones--Frank R. Baumgartner and Bryan D. Jones, Richard Fenno, Allen Schick, Dennis Ippolito, Naomi Caiden, Irene Rubin, James D. Savage, Thomas Greitens and Gary Wamsley .
After revision: Notable recent theorists include Frank R. Baumgartner , Bryan D. Jones, Richard Fenno, Allen Schick, Dennis Ippolito, Naomi Caiden, Irene Rubin, James D. Savage, Thomas Greitens , Gary Wamsley, and Usman W. Chohan .