<p>This paper argues that policy objectives, resources, availability of data and technology play a role determining how open data ecosystems work. For open data policies to become an enabler of a more inclusive and open city different incentives and resources are needed.</p>
<p>The most important conclusion of this case study is that just releasing public information in open standards (in short open government data or OGD) will not unleash social and economic change in the cities.Yet it does have the potential to do the former, if an appropriate set of incentives and institutional framework are available. Focusing on the case of Montevideo city , this case study explores how a nascent environment of open data users and providers is emerging, and which are the key structural elements that allowed this particular environment to flourish. The study seeks to to contribute towards an evidence-based approach to open data. It should help practitioners and decision makers in Montevideo and elsewhere to realise the value of open data and the opportunities and issues ahead.</p>