This report cannot hope to cover all the issues discussed at the seminar on Data for Welfare Decision Making held at the Social Welfare Research Centre on 2-3 July, 1980. It attempts to cover issues which were highlighted in discussion. Many important points made by individuals may not be covered due to the need to limit the size of this report. The report may, nevertheless, jog the memories of those who attended and raise key questions for others who read it. The format of the seminar varied slightly from the original agenda. This was mainly due to participants wanting to explore some of the philosophical issues before considering any framework for organising questions.