In order to model information dissemination in social networks, a special methodology of sampling statistical data formation has been implemented. The probability distribution laws of various characteristics of personal and group accounts in four social networks are investigated. Stochastic aspects of interrelations between these indicators were analyzed. The classification of groups of social network users is proposed, and their characteristic features and main empirical regularities of mutual transitions are marked. Regression models of forecasting changes in the number of users of the selected groups have been obtained.

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The article is devoted to some frequently occurring cases of civil liability in air transport in the event of a plane crash. The article analyzes the norms of air legislation both domestic and foreign. The author makes suggestions on amendments to the legislation of the Russian Federation.