The modern city runs on data. For example, collecting the right taxes is crucial to city revenue, without which city services would not be funded and cease to work. Registering who needs to pay what and when in taxes is a data problem. Making sure that residents receive the right social and health services is a data problem. We need to know who lives where and what their needs are. If this does not work, people will live in poverty and potentially die due to lack of medical attention. Monitoring air quality and water quality is also a data problem because it depends crucially on a city’s ability to collect, ...