better evidence into government. The paper also describes, for the first time, several fun examples of trials that have been conducted in UK government over just the past year, reporting both positive and negative findings. These trials all test small, modest changes in policy -- and ones that are ideologically uncontroversial -- because this is the best way to get trials adopted more widely. What's more, they've all been run by a small group of very smart people running out of the Cabinet Office, who have quietly set up what is effectively a randomised trials unit in government.  There are quite a few people in the civil service who seem to be on board for all this, so it will be interesting to see if the idea catches on. Anyway, I think (I hope!) that the paper is readable and straightforward, like the Ladybird Book of Randomised Policy Trials, and I really hope you'll enjoy reading it. It's a good primer on basic research methods, and on how to do a trial properly in any domain, with clear examples taken from the real world of medicine, business, teaching, job centres, web design, and more. The people I wrote it with are a mix of supersmart civil servant policy wonks and academics. To be clear: this is a long read, and there's a ton of material in these 30 pages. It's free to download here: (I read PDFs like this with iAnnotate on iPad, or more commonly on my Kindle: email