“…Although some number of tools have been developed [98], there is a need to expand the evidence on what policies are achieving a reduction in inequalities, as pioneered in the Netherlands at the local level, and to communicate this research at an international level. Possibly, the main challenge to date lies in evaluating the impact of policies targeting socio-economic groups given the short supply of good-quality evidence to guide policy; the need of new and more consistent data for comparative national-level analysis, and further, a need to taking advantage of natural experiments (for example, changes in employment opportunities, housing provision or cigarette pricing).…”