Although exhaustive answers to these twelve questions, and their practical application would considerably widen the above-mentioned bottleneck, new problems must be reckoned with on the way. The questions themselves do not always apply/ or do not solely apply to mathematicians, but also to the businessman, the psychologist, the sales specialist, the media planner and equally to many others. But they do apply to the mathematician in each speciality and to the psychologist, economist, etc. and to every mathematician who is committed to social research. That is why a thorough reconsideration of these and similar questions is particularly well suited to call into being inter-disciplinary research, and to make market research into a model to be followed by social research.