In their Guidelines for Collecting and Interpreting Innovation Data, the OECD and Eurostat (2005) define innovation as the implementation of a new or significantly improved product (goods or service), process, marketing method or organisational method in business practices, workplace organisation or external relations. Later definitions have broadened their scope, to include social innovations, innovations in services and innovations in the public sector as well (Halvorsen et al., However, knowledge about public sector innovation, and its results, costs and enabling environment, is fragmented.