Payment by Results (PbR), where aid is disbursed conditional upon progress against a pre-agreed measure, is becoming increasingly important for various donors. There are great hopes that this innovative instrument will focus attention on ultimate outcomes and lead to greater aid effectiveness by...

Since the late 1990s a selection on policy approach to aid was advocated such that more aid should be allocated to countries with good policies, but there is little evidence that this has occurred. This paper argues that donors may exercise selectivity over the aid modality. Specifically,...

Since the late 1990s a selection on policy approach to aid was advocated such that more aid should be allocated to countries with good policies. A number of donors accepted this recommendation, including the World Bank, but there is little evidence that this has occurred. Donors, including the...

This paper addresses the effect of aid loans and grants on tax effort using data for 82 developing countries over 1970–2005. We find no robust evidence for a negative effect of aid (grants or loans) on the tax/GDP ratio, other than a contemporaneous correlation, but find some evidence that the...