Hefetz, Amir and Mildred E. Warner 2012. “Contracting or Public Delivery? The importance of service, market and management characteristics,” Journal of Public Administration Research and Theory, 22(2): 289-317. DOI 10.1093/jopart/MUR006
Hefetz, Amir, Mildred Warner and Eran Vigoda-Gadot 2014. “Concurrent Sourcing in the Public Sector: A Strategy to Manage Contracting Risk,” International Public Management Journal, 17(3): 365-386. DOI: 10.1080/10967494.2014.935242
Warner, Mildred E. and Hefetz, Amir (2020). “Contracting Dynamics and Unionization: Managing Labor, Political Interests and Markets.” Local Government Studies, 46(2): 228-252. DOI: 10.1080/03003930.2019.1670167