Harmen van Sprang is the co-founder of shareNL, the Dutch knowledge and networking platform for the collaborative (sharing) economy. Together with co-founder Pieter van de Glind and his team, Harmen works with startups, corporations, cities, governments and knowledge institutions in The Netherlands and abroad. All with the objective to further develop the collaborative economy. Furthermore, they are the initiators of Amsterdam Sharing City and co-founders of Sharing Week. And Pieter and Harmen are the authors of a book about the collaborative economy, called 'Share.'