John, Peter, and Toby Blume. “How Best to Nudge Taxpayers? The Impact of Message Simplification and Descriptive Social Norms on Payment Rates in a Central London Local Authority”. Journal of Behavioral Public Administration 1, no. 1 (February 26, 2018). Accessed September 26, 2020. https://journal-bpa.org/index.php/jbpa/article/view/10.