Now more than ever, OECD countries are investing significant resources in regulatory policies and reforms. At the same time, governments are under increasing pressure to explain such reforms and their benefits to the public. Perception surveys are an important part of this process and they are being used by OECD members to measure how citizens and businesses view regulation in their countries.This guide helps officials use perception surveys to evaluate and communicate the results of reform processes. While the guide draws on examples from the regulatory field, it is also useful for other policy areas. In non-technical language, the guide clearly explains the challenges involved in the design and use of business and citizen perception surveys - and ways to overcome them. It also helps officials get the most out of survey results, whether conducted internally or by external experts.