Morschheuser, BenediktBenediktMorschheuser0000-0002-7665-8971Hamari, JuhoJuhoHamariMaedche, AlexanderAlexanderMaedche2025-03-312025-03-3120191095-93001071-5819https://fis.uni-bamberg.de/handle/uniba/107184engCooperation or competition - When do people contribute more? : A field experiment on gamification of crowdsourcingarticle10.1016/j.ijhcs.2018.10.001