Citizens’ initiatives are the focus of public attention as part of the popular ‘do-democracy’ (associative democracy). However, it is not clear to what extent citizens are able to shape self-organization in a sustainable manner, what the important factors in this respect are and if citizens’ initiatives are the sole preserve of a better educated group of citizens. Through a secondary quantitative analysis of 56 citizens’ initiatives, this article offers an empirical contribution to answering these questions. The authors explore the effects of three possible factors on the sustainability of citizens’ initiatives: the network structure of the citizens’ initiative, the organizational design of the initiative and the revenue model. They show significant relationships between the organizational design of citizens’ initiatives and their sustainability. They also show a relationship between the network structure of these initiatives and their sustainability: initiatives that develop into a fully connected network or a polycentric network are more sustainable than initiatives with a star network. The personal characteristics of the initiators show a dispersal in age, descent, gender and retirement. Relatively speaking, many initiators have a high level of education: 80% has a higher professional or university education. But there are no significant relations between these personal characteristics and the sustainability of citizens’ initiatives.Burgerinitiatieven staan in het kader van de ‘doe-democratie’ in de schijnwerpers. In hoeverre burgers in staat zijn om op een duurzame manier zelforganisatie vorm te geven en wat hierbij belangrijke factoren zijn is nog verre van duidelijk. Dit geldt ook voor de vraag in hoeverre burgerinitiatieven zijn voorbehouden aan een specifieke, hoger opgeleide groep burgers. Door middel van een secundaire, kwantitatieve analyse van 56 burgerinitiatieven wordt in dit artikel een empirische bijdrage geleverd aan de beantwoording van deze vragen. We verkennen de effecten van drie mogelijke factoren op de duurzaamheid van burgerinitiatieven: de netwerkstructuur van het burgerinitiatief, de organisatorische vormgeving en
