In 2011, ANDS commissioned a study to examine the costs and benefits of public sector organisations making their Public Sector Information (PSI) data freely available. The study was undertaken by Prof John Houghton, a prominent economist and researcher in the 'open access' field. It involved a number of public sector agencies, each suggesting different benefit:cost ratios. Overall, the study demonstrated that the benefits of making PSI data freely available far outweigh any costs, by some considerable margins. In late 2014, ANDS commissioned a follow-up report to estimate the total public spend on research, the value of the data created and analysed during the research process, and evaluate the benefits of curating and openly sharing public research data. This webinar explores the findings of these two reports.