Bilateral aid procurement is politicised and strongly favours suppliers from donor countries. Does multilateral development assistance eliminate the procurement bias favouring donor countries because international bureaucrats make procurement decisions? Existing evidence from the World Bank, which delegates procurement responsibilities to aid recipient countries, cannot answer our theoretical question. Using official data from 20 UN organisations during the 2013–2018 period and applying regression and mediation analysis, we find that the procurement of international organisations still favours...