... Work Broad understanding Crowdsourcing does not need an active shift from current employees (or again, contractors) to the crowd; it can start with the crowd (Howe, 2006a) Different levels of skills are required (Felstiner, 2011) Human process tasks that are difficult to implement in software (Satzger et al., 2013) A wide range of pay levels (Hammon & Hippner, 2012;Hossain & Kauranen, 2015) Narrow understanding A job traditionally performed by a designated agent (usually an employee) (Greengard, 2011;Satzger et al., 2013;Schörpf et al., 2017) Content creation, problem-solving and corporate R&D (Brabham, 2008;Kleemann et al., 2008). Usually innovation-related work (Saxton et al., 2013) Compensated at piece rate (Felstiner, 2011) Using workers' spare resources (Kleemann et al., 2008) Platform Broad understanding Web-based environment (Barnes et al., 2015;Brabham, 2008;Satzger et al., 2013;Saxton et al., 2013) Narrow understanding Web 2.0 (Hammon & Hippner, 2012) Intermediary (Battistella & Nonino, 2013;Hossain & Kauranen, 2015;Schörpf et al., 2017;mediator Hirth et al., 2013) Workers Broad understanding Large network of potential labours (Djelassi & Decoopman, 2013) Open call (Barnes et al., 2015;Djelassi & Decoopman, 2013) General public (Kleemann et al., 2008) Narrow understanding Undefinably large, heterogeneous mass of interested internet users (Hammon & Hippner, 2012) Amorphous collection of individuals sitting in front of computer screens (Felstiner, 2011) Diversity, largeness, suitability of independent contractors (Pongratz, 2018) Undefined, nonprofessional and heterogeneous virtual crowd (Saxton et al., 2013) Requesters Broad understanding Requesters are mostly companies, but other project initiators cannot be excluded (Hammon & Hippner, 2012) Narrow understanding Company or organizations (Hossain & Kauranen, 2015;Satzger et al., 2013;Saxton et al., 2013) Profit-oriented firm (Kleemann et al., 2008) peer-to-peer (P2P) collaboration and, by extension, P2P consumption (see Parguel et al., 2017). While some have suggested that transactions in the sharing economy could happen between individuals and businesses (Puschmann & Alt, 2016), others have argued that this would amount to micro-entrepreneurship rather than sharing (Codagnone & Martens, 2016). ...