The studies we want to speak about are: Firstly, a continuous quantitative observation of performance indicators from 1970 to 1975 mainly aimed at monitoring trends. The sample consisted of 400 representatively-selected radio and television dealers in Germany, Secondly, a more comprehensive study, mainly directed at a better description of the actual situation, which was carried out in 1976. This study was based on 300 dealers, selected in the same way we have just mentioned. Finally, qualitative research of the background of the actual situation carried out in 1977. The key objective: To enable us to make recommendations for future actions. This study was based on 50 dealers obtained by the typical selection method we outlined earlier.