Did you know that Indian citizens know more about private companies supplying public services than we do here in the UK?

A grassroots campaign over many decades in India has led to a right to information law. Access to data about, among other things, government contracts, has already resulted in a reduction in corruption and fraud in central and local government.

That's just one example of the power of information - a lesson being discovered by citizens and governments all around the world. This is why the inaugural Open Government Partnership event in Brasilia matters this week.