Evaluation features strongly in previous and ongoing research studies. More specifically, the main interest is often in estimating the causal impact of a policy or programme, using a range of experimental (randomised trial) and non-experimental techniques. In addition, evaluation methods inform other analyses concerned with learning about causal relationships (the effect of qualifications, for example). The list of evaluation studies below is grouped by approach. For other (non-evaluation) studies, follow the “Modelling and descriptives” link.