The fourth and conclusive topic of the lecture course «Firm-level Empirical Sur­veys: Tools and Practice» is presented in this issue. The topic «Empirical studies of Russian enterprises behavior: subject-matters and methods» includes two lectures and describes emergence and development of applied empirical studies of Russian enterprises behavior in 1990–2000^th and ways of improvement methodology for collecting and analyzing data. Examples of implemented research project illustrating the history of development firm-level surveys are considered. In conclusion of the course we return to discussion of the key issue of quality of empirical information and means of its improvement. Besides, special recommendation for organization of seminars and check of students’ learning are presented.