The aim of the research is to assess convergence processes of a social-economic security indicator in Latvian municipalities and its components in the period 2011–2015, calculated as an integral indicator on the basis of primary statistical indicators. The relevance of the research is determined by the fact that social-economic security establishes not only the sustainable economic development of the country as a whole, but also the state of protection from internal and external threats. Municipalities, implementing their autonomous functions, are primary guarantors of social-economic security of the people. The convergence of social-economic security of municipalities implies the process of their convergence in time according to the values of the level of social-economic security.
The issue of attracting investments is one of the key issues in modern society. The global experience shows that sustainable economic development and growth are determined by the volume and structure of investments. Therefore, the study into the investment environment where the investment activity happens – the investment climate, is becoming increasingly relevant. The prerequisites for the study into the investment climate have been formed since the Keynesian economic theory; studies into the investment climate have become widely spread in modern economic theories. Starting with the Keynesian economic theory and until modern theories of investments, the factors that influence the investment climate can be divided into two groups: investment potential and investment security of the region. According to the outcomes of the factor analysis of Latvia’s regions (Riga, Pieriga, Vidzeme, Kurzeme, Zemgale, and Latgale regions), Lithuania’s regions (Vilnius, Alytus, Utena, Panevezys, Kaunas, Klaipeda, Marijampole, Taurage, Telsiai, Sauliai counties), and Belarus’ regions (Vitebsk, Grodno, Mogilev, Minsk, Gomel, and Brest oblasts, and Minsk city), the factor of socioeconomic security is adeterminant of regional differences in the investment climate.
Global crises of the end of the XX – beginning of the XXI century have additionally contributed to the search for new market opportunities and made it obvious that on the modern market efforts of one particular company are not enough to do business efficiently. Thus, companies choose a survival strategy in times of growing uncertainty and together with small-scale and medium-scale companies form unified structures which allow competing successfully with large companies. These structures also reveal and enhance their advantages which lie in flexibility and adaptability to the market demands. The article examines basic models of the intercompany networks which meet the requirements of transition to sustainable economic growth in the cross-border region (Latvia-Lithuania-Belarus).