EN
The author addresses the question of interdisciplinary studies based on his own experience. Collecting together the results of his negative experiences confirms that the proportion of citations from other disciplines is very low in four examined fields (economics, law, political science and sociology). But the overall picture is coloured by positive examples: the theory of rational choice has broken the bounds of economics and play theory assumed an extra-disciplinary descriptive form. Nor is multivariable regression analysis of timelines for countries confined to economic phenomena. Furthermore, use of 'soft' data has become acceptable in economics. The spread of the interdisciplinary is also shown in the way the system paradigm has become general as an approach. The author ends with three proposals: let us have a minimum conversancy with other disciplines, support interdisciplinary work, and promote the emergence of a new type of 'social scientist'.