Evidence reviews


The IEU believes that it is important for the GCF to learn from global evidence on what works, what doesn’t, for whom, why, and how much. This can help the GCF leap ahead. The IEU’s evidence reviews are a systematic collation of global evidence on topics that are relevant to the GCF. Our compilation of evidence reviews are based on a structured literature search guided by a protocol. They appraise the quality of evidence and illustrate the evidence base in an easy-to-understand manner.

The IEU produces two important forms of evidence reviews:

Evidence Gap Maps (EGMs) are maps that depict high-quality evidence – or the lack thereof – in a thematic area. They usually use a theory of change and an evidence framework (with interventions and outcomes). 

Systematic reviews synthesize and assess high-quality evidence and may or may not contain meta-analysis.

The IEU’s evidence reviews are a key component of its learning and advisory service functions. Both evidence gap maps and systematic reviews provide important lessons on what the world is learning both in the academic literature but also in the implementation literature.