Considering the specificity of SI process and the complexity of SI Business Models emerging form the analysis has they have been presented and discussed in Part I of this deliverable (Rizzo, Komatsu & Deserti, 2015), this II Part of the deliverable will undertake a multidisciplinary study to advance understanding of the different factors influencing such peculiar nature. The literature review will contribute form one side to build theoretically sound and comprehensive deepening of the numerous factors that underlie the actual economic structure of social innovations, and, from the other, will enhance differences or similarities with other forms of innovations. The factors and concepts affecting social innovation business structure emerging form the cases reported in D3.2 have been organized following the first categorization of SI economic principles, objectives & components.