Overton Index

Overton Index is the world’s largest policy and grey literature database, tracking over 21 million documents and automatically finding links to the evidence they reference.

Use the full-text search and policy-to-policy citations to see how research influence spreads through policy organisations and get an accurate picture of impact.

You can use Overton Index to:

• track and analyse evidence use in policy
• access policy documents for analysis
• support reporting and research assessment for annual reports, grant applications, tenure applications and evaluations.

Licence information

Authorised users are not permitted to use Overton (in whole or in part) other than for Educational purposes. Educational purposes are defined as education, teaching, tuition, training, instruction, learning, private study and/or research, including distance learning and teaching.

Authorised users are not permitted to make any Commercial use of Overton (in whole or in part). Commercial use means use for the purpose of earning monetary reward or generating profit (whether by or for the Institution or an Authorised User) by means of the sale, resale, loan, transfer, licence, hire or other form of exploitation of the licensed material, but, for the avoidance of doubt, excluding: use for which the Institution is entitled only to be reimbursed its costs (which may include overhead costs); and use of the licensed material in the course of research funded by a commercial or for-profit organisation.