Sakari Siltala holds a Ph.D. from the Department of History at the University of Helsinki. He defended his thesis in November 2013. The subject was the role of co-operatives in the dissolution of Finnish collaborative capitalism, 1982-2004. The focus was on forest industry, and on one particular co-operative. Currently he is doing postdoctoral research on co-operative retail. His fields of interest include co-operation, retail, national business systems, varieties of capitalism, and the forest industry.