Show 10 5 10 15 20 50 100 250 Sort by year (new to old) Actions Download search results Subscribe to news feed Your filters: cql: author="Robins, J M" or (type any "bookEditor issueEditor" and editor="Robins, J M") Add to list Journal Article A1 open access Using negative controls to identify causal effects with invalid instrumental variables Oliver Dukes (UGent) , D B Richardson, Z Shahn, J M Robins and E J Tchetgen Tchetgen (2025) BIOMETRIKA. 112(1).