(Polish title: 'Wspólpraca' czy 'negatywna interakcja'? Relacje pomiedzy niemieckimi badaniami wschodnimi w Królewcu a polska mysla zachodnia). The academic as well as political analysis of history of German-Polish relations in recent years has been marked by some progress. Even if continuous tackling of the national traditional materials is indeed essentially, the separated examination of 'German' or respectively 'Polish input' cannot result in substantially clarifying the circumstances. The interdependence between the German East- and Polish West- studies was so deep and continuous to barely grasp their common history without a comparative perspective and without examining the history of these relations. This articles aims at inquiring this relationship exemplified by the 'Institut für Ostdeutsche Wirtschaft' (IOW) from Königsberg and 'Instytut Baltycki' from Torun respectively Gdynia in the 1920s. It is also a plea for placing the field of studies in a broader context: The comparative perspective should not be limited to the surface of published texts of the East- and West researchers, but it should rather ask for the conditions, in which these publications had emerged. Thus not only the obvious parallels can be drawn, but also the differences, which prevent the slip from comparison into uniformity.