Fuzzy set theory tools in models of uncertainties in economics

Abstract

The object of analysis is the applicability of the fuzzy sets theory tools for study the uncertainty of contemporary socio-economic structures. It’s revealed the role of fuzzy set theory as formalizing instrument of macro-and microlevel interactions in uncertain economy conditions and decision-making taking into consideration the conflict of purposes. The article also illustrates the instrumental abilities of fuzzy set theory on the examples of the task adjusting the national budget’s social component in conditions of modernization of the economy and the consumer choice optimization model. The budgetary opportunities of the consumer in this case will be reborn to “a budgetary surface”. In its turn, the optimal consumer choice, based on the fuzzy set methodology, is formalized as a fuzzy set of options for the actual choice, taking into account fuzzy restrictions on income, time and information, and in relation to a fuzzy set of variable consumer sets of close integral utility. The equilibrium state of the market parameters reflected by the model acts as a “balance of uncertainties”.