The knowledge base
Written for people making or scrutinising real operational decisions — not for selling them a project. Everything here is free to read, with no registration and no paywall.
Items marked In preparation are being written. We do not link to a resource before it exists.
How we write these
Every resource follows the same discipline. Conclusions are stated plainly. The assumptions behind any figure appear in a marked block on the same page, not in an appendix. Where we give a number, we give the range and identify which inputs move it. Where the honest answer is that the evidence does not support acting, we publish that instead of a recommendation.
We would rather publish six resources a reader can check than sixty they have to trust.