
Over the course of about 15 months, Jobcentre Plus randomly assigned over 16,000 people, making the ERA evaluation the largest random assignment test of a social policy's effectiveness in the UK to date. What did it take to implement this methodology within local offices? How well did the random assignment process work? And what lessons does the ERA experience hold for the application of this technique to future social policy evaluations in Britain? This report, based on a special case study undertaken as part of the overall ERA evaluation, addresses these questions.