In this paper we provide detailed derivation of dynamic stochastic general equilibrium model QUEST III that was developed under European Commission project. The principal feature of the model is the presence of both monetary and extended fiscal blocks. In particular, Central Bank sets interest rate using monetary policy rule, while fiscal sector is represented by taxes and transfers. It allows analyzing the effect of complex shocks on the key macroeconomic variables. Our results show that parallel application of monetary and fiscal instruments is an effective way to combat stagflation, i.e. drastic decrease in production and acceleration of inflation. Due to the presence of extended fiscal block, the model can fit Ukrainian economic and policy structure quick good. The next steps of the research may be calibration and estimation of QUEST III prototype on the Ukrainian data with potentially some modification and inclusion of banking and other sectors that play critical role in the local conditions. Monetary policy instruments should be extended with the level of Central Bank reserves which have large influence on macro stability. In addition, dollarization is an important peculiarity that should be addressed in the future versions of the model.
Keywords: dynamic stochastic general equilibrium model, fiscal and monetary policy, complex shocks, supply shock, stagflation.
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