AlbertsonKFoxCO’LearyC, et al. (2018) Payment by Results and Social Impact Bonds: Outcome-based Payment Systems in the UK and US. Bristol: Policy Press.
2.
ElbadawiIRandaJ (2003) Assessing the Development Impact of CDF-like Experiences. Washington, DC: Operations Evaluation Department, World Bank.
3.
MahoneyJGoertzG (2012) A Tale of Two Cultures: Qualitative and Quantitative Research in the Social Sciences. Princeton, NJ: Princeton University Press.
4.
MillJS (1843) A System of Logic, Ratiocinative and Inductive: Being a Connected View of the Principles of Evidence, and Methods of Scientific Investigation. London: John W. Harper.
