Donors and governments in aid recipient countries are under pressure to demonstrate effectiveness of aid, especially due to increasing stress on fiscal balances in the context of the global financial and economic crisis. The evidence on aid effectiveness remains mixed at best: while individual targeted aid interventions appear to produce positive results, the impact of aid at the macroeconomic level remains limited. Furthermore, the reporting on concrete outcomes of aid interventions remains inadequate, thus perpetuating doubts around aid effectiveness. This paper discusses these micro-macro gaps in aid effectiveness and the reporting problem. It proposes some ways in which well-designed and carefully implemented evaluations can help bridge these gaps, and how better reporting and transparency on aid results can advance the aid effectiveness agenda.