1. Allers MA, Hoeben C (2010) Effects of unit-based garbage pricing: a differences-in-differences approach. Environ Resource Econ 45(3):405–428
2. Armstrong M (2015) Armstrong’s handbook of performance measurement – an evidence-based guide to delivering high performance. Kogan Page, London
3. Arrow KJ (1985) The economics of agency. In: Pratt JW, Zeckhauser RJ (eds) Principals and agents: the structure of business. Harvard Business School, Boston, pp 37–54
4. Bailey SJ (1999) Public sector economics. Macmillan, London
5. Behn RD, Kant PA (1999) Strategies for avoiding the pitfalls of performance contracting. Public Product Manag Rev 22:470–489