Viktors Ajevskis

The equilibrium real exchange rate: pros and cons of different approaches with application to Latvia

This paper studies various approaches to the equilibrium real effective exchange rate estimation, including structural and direct estimation approaches. It shows their strengths and weaknesses with application to the case of Latvia. Despite the approaches differing considerably in terms of their theoretical background and data used they all indicate that the real exchange rate of Latvia after appreciation during the boom years and subsequent adjustment afterwards remained close to its equilibrium level at the end of the sample period, namely at the end of 2010.

A target zone model with the terminal condition of joining a currency area

This study aims to generalize the Krugman target zone model for the case of terminal condition of joining a currency area. Using the terminal condition and the ‘smooth pasting conditions’, both analytical and numerical solutions of the problem are obtained. The proposed model is more adequate than the Krugman one when the moment of joining currency area approaches. The properties of the model highlight that monetary authorities have some degree of monetary independence until the moment of entering a currency zone. The models outcomes are consistent with dynamic properties of the exchange rate time series of the European countries that entered euro zone in January 1999.

Semi-Global Solutions to DSGE Models: Perturbation around a Deterministic Path

Abstract This study proposes an approach based on a perturbation technique to construct global solutions to dynamic stochastic general equilibrium models (DSGE). The main idea is to expand a solution in a series of powers of a small parameter scaling the uncertainty in the economy around a solution to the deterministic model, i.e. the model where the volatility of the shocks vanishes. If a deterministic path is global in state variables, then so are the constructed solutions to the stochastic model, whereas these solutions are local in the scaling parameter. Under the assumption that a deterministic path is already known the higher order terms in the expansion are obtained recursively by solving linear rational expectations models with time-varying parameters. The present work also proposes a method rested on backward recursion for solving general systems of linear rational expectations models with time-varying parameters and determines the conditions under which the solutions of the method exist.