Mutual benefit aware task assignment in a bipartite labor market

As one of the three major steps (question design, task assignment, answer aggregation) in crowdsourcing, task assignment directly affects the quality of the crowdsourcing result. A good assignment will not only improve the answers' quality, but also boost the workers' willingness to participate. Although a lot of works have been made to produce better assignment, most of them neglected one of its most important properties: the bipartition, which exists widely in real world scenarios. Such ignorance greatly limits their application under general settings.