The term open government is often used to describe initiatives of putting government information on the Internet. This conceptualization is too restricted since open government is not only about openness in informational terms (vision) but also about openness in interactive terms (voice). On the basis of an analysis of 103 articles, this article provides insight into the concepts of openness, transparency and participation, their interactions, and the manner in which they have been discussed in the literature. This analysis shows the differences and similarities between economic, political science and legal perspectives on open government and argues that a multidisciplinary approach needs to be taken. The authors conclude that open government is much too important to leave it to the ‘techies’: scientists and practitioners with backgrounds in law, economics, political science and public administration should also get involved to build sound connections between vision and voice that facilitate active citize...