We describe and apply a method to determine the net social benefits of science shops. University departments operating as science shops coordinate research projects for individuals or civil society organizations (CSO) lacking the financial means to turn to professional consultancy bureaus. Three cases are analyzed; the science shops atWageninge
...n, Brussels and Eindhoven. After investigation, it appears that under the normal assumptions for the application of CBA, the science shops concerned show positive net social benefits.