Meta science project on the transparency in research products sampled randomly from the Knowledge Infrastructure for Nonprofit and Philanthropic Studies (KINPS). How do publications in nonprofit and philanthropic studies report on the type of data they report on? What are the characteristics of samples and measurement instruments used in research? Which research designs and methods are used in the analysis of data? To what extent do publications describe the generalizability and validity of observations? Which criteria do publications use to support the methodological quality of research in nonprofit and philanthropic studies?