Criticism is what inspires the growth of knowledge - at least in societies that are influenced by the Western world's tradition of rational discourse. In this sense, social research archives create a space for the critical discussion of research results by providing access to data already published and analysed by others. Quite apart from their function of placing research datasets in the public domain and ensuring equal access to them, data archives also increase the cost-effectiveness of research by making primary data collections available for secondary analysis.