The Newton Institute is keen to measure the wide-ranging impact of its scientific programmes. To this end we have developed a series of case studies based on the specific experiences of researchers which show the significant advances made during their time at INI. These case studies highlight the breadth of impact and the pervasive value of the mathematical sciences, including economic or social benefit and influence on government policy. Over time, we hope that these case studies will become a substantial body of evidence to ensure that the Institute can demonstrate its effectiveness to funders and stakeholders. The case studies completed so far can be seen below.