Purpose of the study is to estimate the information support on budget investments and analyze the sources of their formation from the standpoint of completeness and reliability of information for their use as an information base for a statistical study of the impact of budget investments on the social, environmental and economic development of the regions of the Russian Federation. The main directions for assessing the information security of the research are: studying the requirements and basic standards for information; specifics and structures of formed information flows; analysis of information resources, including their parameters and characteristics describing their properties and purpose; determination of units of main information elements, their grouping by formation sources, by main users, by formation system.Materials and methods. The research used the theoretical methods: analysis, synthesis, grouping of sources of information on budget investments.Results. The conducted research allowed making a conclusion on a high degree of information security of a rather extensive, multidimensional set of information sources and resources on budget investments. This paper is the basis for the formation of a categorical instrument of statistical research on budget investments. The information array of data on budget investments is aimed at analytical procedures that can be carried out by types, sorts, forms of implementation, budget levels and budget investments realization stages including regional sectioning.Conclusion. The conducted research has a high degree of practical value due to its aim at direction on elaboration of tools for state management of budget investments. Rapid development of forms and resource chances of the formed information flows on budget investments determined by realization of requirements to the publication of data by state bodies and local self-government bodies which have become more often placed on the Internet as data arrays in the format ensuring their automatic processing to be reused in terms of free use.

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The paper presents a methodology of statistical analysis to assess efficiency of initiative budgeting at the regional level, which is one of the most urgent areas for improvement of the mechanism for managing socio-economic development of territories. The introductory part of the article explains the relevance of applying mathematical and statistical methods of analysis to improve the efficiency of initiative budgeting in the regions, and also describes theoretical and methodological provisions and information sources implemented in the author's own methodological studies designed to assess the efficiency of initiative budgeting on the example of the Stavropol Territory – pilot region for the implementation of the Local Initiatives Support Program (LISP). While analyzing structural and dynamic relationships of indicators associated with financing and results of LISP implementation, the authors applied two versions of cluster analysis:– clustering of municipal units of the studied region by the values of indicators of financing and LISP performance, ensuring the allocation of statistically homogeneous groups of administrative and territorial entities;– clustering of indicators characterizing the volume of funding and LISP performance at the municipal level, which gave an idea of the multi-level interdependence of these indicators and was taken into account when building multi-factor models of the effectiveness of initiative budgeting programs in the region.The article concludes that the indicators of infrastructure development using LISP funds are very important from the standpoint of socio-economic development of the territories, but are dependent on the living standards of the population, which provides the necessary degree of public initiative for «inclusion» of the LISP mechanism. In addition, the identified and assessed patterns, although they are common for the considered pilot region for the implementation of LISP, have specific manifestations in certain groups of municipalities, which requires finer targeted “tuning” of LISP by substantiating its projects to obtain socio-economic results, most relevant to each municipality.