TI 2017-119/VIII Tinbergen Institute Discussion Paper Crowdfunding public goods: An experiment Erik Ansink1 Mark Koetse3 Jetske Bouma2,3 Dominic Hauck3 Daan van Soest4 1 VU Amsterdam; Tinbergen Institute, The Netherlands 2 Netherlands Environmental Assessment Agency (PBL) 3 Institute for Environmental Studies, Vrije Universiteit Amsterdam 4 Department of Economics and CentER, Tilburg University Tinbergen Institute is the graduate school and research institute in economics of Erasmus University Rotterdam, the University of Amsterdam and VU University Amsterdam. Contact:
[email protected] More TI discussion papers can be downloaded at http://www.tinbergen.nl Tinbergen Institute has two locations: Tinbergen Institute Amsterdam Gustav Mahlerplein 117 1082 MS Amsterdam The Netherlands Tel.: +31(0)20 598 4580 Tinbergen Institute Rotterdam Burg. Oudlaan 50 3062 PA Rotterdam The Netherlands Tel.: +31(0)10 408 8900 Crowdfunding public goods: An experiment∗ Erik Ansink,a Mark Koetse,b Jetske Bouma,c Dominic Hauck,b Daan van Soestd December 14, 2017 Abstract We assess the impact of different crowdfunding designs on the success of crowd- funded public goods using a lab-in-the-field experiment. Our design treatments aim to increase the efficiency of crowdfunding campaigns by raising aggregate contributions and decreasing possible coordination problems that may occur when potential donors are faced with a multitude of projects seeking contributions. Amongst others, we explore the potential of seed money and the impact of the attraction effect. Using a four-day time window we implement our crowdfunding experiment using a web-based user interface with multiple threshold public goods, similar in style to conventional crowdfunding websites. We find that such alternative crowdfunding designs affect efficiency via improving coordination, and not so much via affecting total contributions.