Overton This link opens in a new windowOverton is the world’s largest searchable index of policy documents, guidelines, think tank publications and working papers. It collects data from 188 countries and over a thousand sources worldwide and is continually updating. The company parses each document, finding references, people and key concepts, and then links them to the relevant news stories, academic research, think tank output and other policy, allowing authors to search these documents and see where their ideas, papers, reports and staff are being cited or mentioned. Overton can help authors discover where their work may be influencing or changing practice in the real world.