OPEN DATA THE RESEARCHER PERSPECTIVE 2 Preface Paul Wouters Professor of Scientometrics, Director of CWTS, Leiden University Wouter Haak Vice President, Research Data Management, Elsevier A year ago, in April 2016, Leiden University’s Centre for Science and Technology Studies (CWTS) and Elsevier embarked on a project to investigate open data practices at the workbench in academic research. Knowled