The elements of a successful crowdfunding campaign: A systematic literature review of crowdfunding performance Valtteri Kaartemo ab (Corresponding Author) to be published in International Review of Entrepreneurship, Vol. 15, No. 3 a Masar B.V., Herengracht 182, 1016 BR Amsterdam, The Netherlands, http://www.masar.io b Turku School of Economics, University of Turku, Rehtorinpellonkatu 3, 20500 Turku, Finland. Tel. +358-44-5171183 Email: valtteri.kaartemo@utu.fi