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What stops evidence from shaping public policy?. Synthesize the research supply and policy demand gap, including motivated reasoning and the need for capability, opportunity, and motivation across levels of government. Present a practical diagnostic for public-sector teams to identify whether evidence use is blocked by skills, systems, incentives, or decision culture.

Why evidence fails to shape policy

The OECD report argues that the core problem is not a shortage of research: policy-relevant knowledge is often abundant, but it is still difficult to connect that supply to what policy-makers actually need, so the report emphasizes strengthening the demand side for evidence-informed policy making[1].

It also warns that evidence does not move into decisions automatically because people do not process information neutrally; motivated reasoning can lead to biased assessment of evidence when decision-makers favor a desired outcome[2].

How capability, opportunity, and motivation shape evidence use

The OECD frames evidence use through three interacting determinants at the individual level: capability, motivation, and opportunity[3]. Capability is the knowledge and skills needed to find, assess, and use evidence; motivation covers goals, habits, emotions, and analytical decision-making; and opportunity refers to the external conditions that make evidence use possible or prompt it[4].

These are not just personal traits. The report says capacity building has to consider individuals, teams, organisations or institutions, and the wider environment, because each level shapes behaviour and the levels interact with one another[5].

How the blockers show up across government levels

A practical reading of the OECD framework is that evidence use can be blocked by different factors at different levels of government, even when the same research exists[6]. At the individual level, the issue may be skills or confidence; at the team or organisational level, it may be whether evidence is rewarded, embedded in routines, and supported by leadership; and at the wider environment, it may be political context or societal attitudes that make evidence harder to use[7][8].

  • Individual level: capability, motivation, and opportunity need to be tested first, because the OECD treats them as the basic determinants of behaviour[9].
  • Team or organisation level: check whether resources, knowledge-management processes, strategy, leadership, and an evidence-friendly culture are present[10].
  • Wider environment: look for political or social conditions that support or impede evidence use[11].

Diagnostic for public-sector teams: skills, systems, incentives, or decision culture?

Derived from the OECD framework, the most useful diagnostic is to ask four questions in sequence. Each question points to a different kind of blocker, and the answers tell you where to intervene[12][13].

  1. 1. Skills? Do the people involved have the knowledge and skills to find, judge, and apply evidence? If not, the blocker is capability, and the response is training, coaching, and practical support[14].
  2. 2. Systems? Do staff have access to evidence, research links, and knowledge-management processes that make evidence easy to retrieve and use? If not, the blocker is opportunity, and the response is better access, routines, and institutional links[15][16].
  3. 3. Incentives? Do staff believe evidence use is part of their mandate, expect it to be rewarded, and see how it improves policy quality? If not, the blocker is motivation, and the response is clearer expectations, recognition, and leadership signals[17][18].
  4. 4. Decision culture? Does the organisation's culture, political context, or broader environment encourage or discourage the use of evidence? If not, the response is cultural and leadership change, not just more research[19][20].

If evidence is available but still not used, the OECD logic suggests the team should not assume a supply problem first; it should diagnose whether the real barrier is skills, systems, incentives, or decision culture, and then match the intervention to the blocker[21][22].

Bottom line

The OECD's key message is that evidence use depends on the interaction of capability, opportunity, and motivation across levels of government, and that motivated reasoning can distort how evidence is assessed[23][24][25]. For public-sector teams, the practical test is simple: identify whether the barrier is a skills gap, a systems gap, an incentive gap, or a decision-culture gap, then intervene at the level where the blockage actually sits[26][27].