There are also practical limitations to political decision-making processes characterized by bargaining, entrenched commitments and the interplay of diverse stakeholder values and interests. Moreover, what constitutes the best-quality evidence varies with the question being asked, which should be aligned with decision makers’ needs and interests. Sometimes, researchers believe that a matrix, instead of a hierarchy, should be used to design a research basis for the research question they address.
One insider’s view of policymakers’ hierarchy of evidence looks as follows:
1. Expert evidence (including consultants and think tanks)
2. Opinion-based evidence (including lobbyists/pressure groups)
3. Ideological evidence (party think tanks, manifestos)
4. Media evidence
5. Internet evidence
6. Lay evidence (constituents’ or citizens’ experiences)
7. Street evidence (urban myths, conventional wisdom)
8. Cabbies’ evidence
9. Research evidence
To maximize the use of evidence in policy, we should therefore consider including forms of evidence that are of greatest utility and relevance for decision-makers. We need to be pragmatic in combining scientific evidence with governance principles and persuasion to translate complex evidence into simple, influential stories.
The gender evidence CGIAR needs to pursue
To achieve the outcomes of the CGIAR key impact area on Gender Equality, Youth, and Inclusion will require robust and applicable evidence—evidence that is relevant and can be used in a policy and practice setting. The explanatory power of quantitative evidence can be substantiated with evidence based on grey literature as well as evidence based on participatory research, good practices and case studies.
The famous saying, “one size does not fit all”, seems apt in this context. For gender and social development, unlike healthcare, it is difficult to only apply a standard, experimental design in a multidimensional context. Generating and building a strong evidence base hinges on employing a variety of approaches along a continuum, while ensuring relevance and rigor.