During 2013-2015 I was working on the "Social Structure" research project. The aim was to define economic models for architects to work on social impact design. The research was conducted trough qualitative interviews with chosen professionals and combined with work periods of 3 months in 4 different practices focusing on social impact design. The blog Social Structure documents these interviews and the learning process throughout 2013-2015. The project is funded with Antti Nurmesniemi-grant from Asko foundation. Preliminary interviews were funded with a grant from the Finnish Association of Architects (SAFA) and Väinö Vähäkallio scholarship from Aalto University.