EN
The article presents a method of data collection concerning micro-enterprises based on business study of enterprises employing up to 9 people. The author discusses the changes in methodology and organization of the surveys resulted from specialization of Polish statistical offices and the obligation to submit data electronically. This work led to the formulation of the factors affecting the completeness and quality of the results and an indicating one of the research directions - the use of administrative sources in order to reduce the reporting obligations of micro-enterprises. (original abstract)