Musings on research, international development and other stuff

The politics of evidence supply and demand

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I have written before about the separate functions of evidence supply and demand. To recap, supply concerns the production and communication of research findings while demand concerns the uptake and usage of evidence. While this model can be a useful way to think about the process of evidence-informed policy making, it has been criticised for being too high level and not really explaining what evidence supply and demand looks like in the real world – and in particular in developing countries.

I was therefore really pleased to see this paper from the CLEAR centre at the University of Witwatersrand which examines in some detail what supply and demand for evidence, in this case specifically evaluation evidence, looks like in five African countries.

What is particularly innovative about this study is that they compare the results of their assessments of evaluation of supply and demand with a political economy analysis and come up with some thought-provoking ideas about how to promote the evidence agenda in different contexts. In particular, they divide their five case study countries into two broad categories and suggest some generalisable rules for how evidence fits in to each.

Developmental patrimonial: the ‘benevolent dictator’

Two of the countries – Ethiopia and Rwanda – they categorise as broadly developmental patrimonial. In these countries, there is strong centralised leadership with little scope for external actors to influence. Perhaps surprisingly, in these countries there is relatively high endogenous demand for evidence; the central governments have a strong incentive to achieve developmental outcomes in order to maintain the government’s legitimacy and therefore, at least in some cases, look for evaluation evidence to inform what they do. These countries also have relatively strong technocratic ministries which may be more able to deal with evidence than those in some other countries. It is important to point out that these countries are not consistently and systematically using research evidence to inform decisions and that in general they are more comfortable with impact evaluation evidence which has clear pre-determined goals rather than evidence which questions values. But there does seem to be some existing demand and perhaps the potential for more in the future. When it comes to supply of evaluations, the picture is less positive: although there are examples of good supply, in general there is a lack of expertise in evaluations, and most evaluations are led by northern experts.

Neopatrimonial: a struggle for power and influence

The other three countries – Malawi, Zambia and Ghana – are categorised as broadly neopatrimonial. These countries are characterised by patronage-based decision making. There are multiple interest groups which are competing for influence and power largely via informal processes. Government ministries are weaker and stated policy may bear little relationship to what actually happens. Furthermore, line ministries are less influenced by Treasury and thus incentives for evidence from treasury are less likely to have an effect. However, the existance of multiple influential groups does mean that there are more diverse potential entry points for evidence to feed into policy discussions. Despite these major differences in demand for evidence, evaluation supply in these countries was remarkably similar to that in developmental patrimonial countries – i.e. some examples of good supply but in general relatively low capacity and reliance on external experts.

I have attempted to summarise the differences between these two categories of countries – as well as the commonalities – are summarised in the table below.

eval tableThere are a couple of key conclusions which I drew from this paper. Firstly, if we are interested in supporting the demand for evidence in a given country, it is vital to understand the political situation to identify entry points where there is potential to make some progress on use of evidence. The second point is that capacity to carry out evaluations remains very low despite a large number of evaluation capacity building initiatives. It will be important to understand whether existing initiatives are heading in the right direction and will produce stronger capacity to carry out evaluations in due course – or whether there is a need to rethink the approach.


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