In July 2015 the government appointed a new independent commission to look into how the law on freedom of information (FOI) is working. Here, Ben Worthy, Peter John and Matia Vannoni explain how their field experiment provides evidence that FOI requests work, and that they are twice as likely to get a response than informal requests.

In 2010 Tony Blair felt that passing the Freedom of Information Act was one of his biggest mistakes; in 2012 David Cameron claimed requests were ‘furring up the arteries’ of government. In 2015, FOI became controversial again when, after a Supreme Court ruling, the government appointed an independent commission to look into how the law is working. All the debate on the benefits and costs of FOI rest on one question, which is whether the law actually works as it should. Does FOI enable a user to ask a question and get a response? Do public bodies comply? Finding this out is trickier than it sounds. Simply measuring numbers of requests may not tell us much, as we need to measure it against something else. Some great attempts have been made in Brazil, Mexico and in an international 14 country study.

Building on these, we devised an experiment to compare whether a request under the law works better than a more informal route: that of simply asking. We sent out a series of similarly-worded FOI requests and informal asks – the former specifically mentioned the FOI Act. This way we hoped we could see if an FOI with the force of law worked better than just asking informally.

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