1. Contracting for aid;Azam;Journal of Development Economics,2000
2. On the private provision of public goods;Bergstrom;Journal of Public Economics,1986
3. Politics and the effectiveness of foreign aid;Boone;European Economic Review,1996
4. Transfers in kind: why they can be efficient and non-paternalistic;Bruce;American Economic Review,1991
5. The Samaritan's dilemma;Buchanan,1975