RT Article T1 When government contractors may or may not spend money on political speech JF Journal of business ethics VO 161 IS 1 SP 91 OP 102 A1 Isaacs, Daniel M. LA English YR 2020 UL https://ixtheo.de/Record/1696838193 K1 Agency Theory K1 Contracts K1 Government contractors K1 Political expression K1 Private prisons K1 Aufsatz in Zeitschrift DO 10.1007/s10551-018-3947-6