1
by Carroll, Stephen J.
Published 2005
RAND

2
by Goldberg, Steven
Published 2012
New York University Press

3

4
by Seabury, Seth A., Scherer, Ethan
Published 2014
RAND Corporation

5
Published 2018
Amsterdam University Press

7
by Price, Carter C., Saltzman, Evan
Published 2013
RAND