On 8 March 2013, LSHTM are hosting a meeting of the International Biometrics Society on the semi-parametric proportional hazards model invented by Sir David Cox in 1972. This statistical tool went on to revolutionise clinical trials analysis and has indirectly saved and improved so many lives over the 41 years that we can’t even begin to count them. (An economist might, but we statisticians wouldn’t know how to count them.) The idea behind it, partial likelihood, was such a step change from what had gone before that we are still learning today all the applications and extensions we can use it for, and new semi-parametric models seem to come out in the stats journals every week. Click here for the programme and registration details.