Knowing where to go: The knowledge foundation for investments in renewable energy

Energy policies are increasingly focused on promoting the transition towards a more sustainable energy
system. Evidence-based decision-making regarding such policies needs a solid knowledge foundation.
We take stock of our existing knowledge regarding the statistics and data that form the basis for research,
policy and business decision-making regarding investments in renewable energy (RE).We point to several
types of problems and challenges related to achieving a statistical overview of investments in the energy
sector, and argue that addressing these problems is not simply a matter of intensifying existing statistical
efforts and improving precision because they are caused by fundamental difficulties. We particularly
emphasize the role of investors as a linkage between public policy and firm-level activity, discussing
the kind of data needed to sufficiently identify investors and their activities and fulfil their particular
information needs related to investing in the RE sector. This information is important not only in research
and policy contexts, but also for investment behaviour.