The article presents the institutions of the grain product path (transaction costs, applied economics of contracts). The article presents the method of research. Due to limited space, the concrete facts, figures, and results are not presented. The aim of this paper is to identify the factors which influence the development or lack of contractual relationships, as well as how vertical coordination could contribute to the improvment and stabilization of terms between the participants involved in the sector. The conditions under which the contracts are made, as well as the differences that exist in practice and the reasons why the different controlling structures are applied are also presented. A questionnaire was used to collect details about each participant of the grain sector. In this article, the structure of the questionnaire, the main characteristics of the survey, as well as the collection of hypotheses of the expected results based on the analizations, are also introduced.