FiMod - A DSGE Model for Fiscal Policy Simulations

Abstract

Abstract:This paper develops a medium-scale dynamic, stochastic, general equilibrium (DSGE) model for fiscal policy simulations. Relative to existing models of this type, our model incorporates a two-country monetary union structure, which makes it well suited to simulate fiscal measures by relatively large countries in a currency area. We also provide a notable degree of disaggregation on the government expenditures side, by explicitly distinguishing between (productivity-enhancing) public investment, public purchases and the public sector wage bill. Finally, we consider a labor market characterized by search and matching frictions, which allows to analyze the response of equilibrium unemployment to fiscal measures.In order to illustrate some of its applications, and motivated by recent policy debate in the Euro Area, we calibrate the model to Spain and the rest of the area and simulate a number of fiscal consolidation scenarios. We find that, in terms of output and employment losses, fiscal consolidation is the least damaging when achieved by reducing the public sector wage bill, whereas it is most damaging when carried out by cutting public investment.Keywords: General Equilibrium, Fiscal Policy Simulations, Labor Market Search JEL codes: E24, E32, E62, H20, H50 Non-technical summaryThe recent crisis has obliged governments around the world to put in place ambitious fiscal stimulus plans and the ensuing fiscal consolidation (or "exit") strategies in order to assure fiscal stability. The latter issue is moving center stage in current public debates. In order to bring fiscal balances back on track, fiscal authorities mainly have the possibility of increasing taxes and/or cutting public spending.But which taxes should be increased? Which spending components should be cut?All across Europe, countries such as Germany, Greece, Portugal, Spain and others have put forward consolidation plans that include cuts in public employment, public wages and public investment as well as increases in VAT and labor income tax rates. Which consequences can we expect from these measures on, among others, the spillover effects of fiscal actions in one country to the other. Second, we provide a notable degree of disaggregation on the fiscal expenditures side. In particular, we explicitly distinguish between public investment and public consumption; the latter in turn is divided between public purchases and the public sector wage bill. Each of these components has a distinct effect on the rest of the economy.The model thus allows simulating specific measures that have been implemented recently in a number of European countries, such as cuts in public sector wages and/or employment, and reductions in public investment. Fiscal expenditures are completed with a number of transfers to the private sector, including unemployment benefits and lump-sum subsidies. On the fiscal revenues side, the model considers also a wide range of taxes, including taxes on consumption, labor income, returns on bond holdings and on physical capital, and socia...

German labor market and fiscal reforms 1999–2008: Can they be blamed for intra-euro area imbalances?

“…The model we use for our analysis is an extension of FiMod (Stähler and Thomas, 2012), which is a two-country monetary union DSGE model with frictional labor markets and a fiscal block that includes a wide range of taxes and disaggregation of government spending. Households, firms, policymakers and the external sector interact each period by trading final goods, financial assets and production factors.…”

“…Maximizing (1) subject to equations (2) and (3) yields standard first-order conditions for optimizing households. These plus the corresponding marginal utility of consumption for RoT households are analogous to those in Stähler and Thomas (2012).…”

“…Notice that, in contrast to the base model of Stähler and Thomas (2012), employment rates for optimizing and RoT households can differ as we have to take into account potentially different labor market participation rates, l i t−1 , which we will detail in the last subsection of the labor market description. Furthermore, we have to take into account that unemployed workers are now divided into short and long-term unemployment.…”

“…The derivation and a more detailed description can be found in Stähler and Thomas (2012). Analogously, we can derive how workers value a match surplus.…”

“…ρ X is a smoothing parameter. In addition to Stähler and Thomas (2012), we further allow unemployment benefits to be time-varying. To be precise, we assume that unemployment benefits depend on the previous period's net wage, i.e.…”