The paper is dedicated to the study of the features of cluster development in Russia. The methodological base of the study includes a set of concepts and theories of special organization of the economy, cluster development concept, theories of network economy and open innovations. We have proved that economy clusterization is a mechanism of efficient productional, science and technological and innovative cooperation of real economy sector enterprises in conditions of strategical tasks of its competitiveness increase. The analysis of the stages of cluster development allowed us to ascertain the initial level of the process being considered under the progressive dynamics of the main functional indicators and increase of business motivation to the economic interaction. There were singled out the main factors of cooperation inside clusters for Russian conditions. We have presented a review of the key directions and events of national economy clusterization. Decentralization of cluster development management contributes to the strengthening of regional economic systems and active advancement of regional cluster initiatives. The creation of digital intracluster interaction platforms in the regions of presence is proposed. It has been noted that to stimulate the process of continuous innovation in clusters of state subsidies allocated to date, it is not enough. The practical significance of the results lies in the possibility of their use in the development of development strategies and programs at the regional and national levels.

The article studies preferences of agents in a setting with imperfect information. For such a setting, the authors propose a new class of preferences. It is said that an agent prefers one statement over another if, among all indistinguishable worlds, the agent prefers the worlds where the first statement is true to those where the second one is true. The main technical result is a sound and complete logical system describing the interplay between a binary modality capturing preferences and the knowledge modality. The proof of completeness is using a newly proposed “tumbled pairs” technique.

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Strategic goal of agri-food systems development (AFS) is provision of food safety of the country. This predetermines food sovereignty of the country on the national level. It is important for regions to achieve self-sufficiency in food. Food safety of each country resident is characterized by the balanced and quality nutrition in the volume no less than the norm of rational consumption. To achieve the food sovereignty on every of the above-mentioned levels, it's necessary to have stable development of the regional agri-food systems where the demand, supply and consumption of the food products form. Functioning of AFS is connected with the efficiency of agri-food production, its competitiveness, trading networks activity, population incomes and participance of the state in the forming of food supply and the demand. The role of the state regulation consists in the forming of conditions for the stable functioning of all its sub-systems, provision of physical, economic and social availability of the food. In conditions of the differentiation of the regions by social and economical development, the level of the population incomes and food prices are varied significantly. This stipulates different levels of the affordability of the food. Besides, economic inequality is noted not only among regions, but also among the employees of different economic sectors, as well as residents of city and rural settlements. In these conditions self-provision of the population with food is a factor of increase of the nutrition quality, and the realization of the excess is a source of additional incomes. State support of the owners of private part-owner units, activity of trading and purchasing consumer co-operatives contribute to the growth of self-sufficiency of the villagers with food.