Indeterminacy in dynamic models: When Diamond meets Ramsey

We consider an aggregate two-periods overlapping generations model with endogenous labor, consumption in both periods of life, homothetic preferences and productive external effects coming from the average capital and labor. We show that under realistic calibrations of the parameters, in particular a large enough share of first period consumption over the wage income, local indeterminacy of equilibria cannot occur with capital externalities alone. It can nevertheless occur when there are only, even very small, vanishing labor externalities provided that the elasticity of capital-labor substitution and the wage elasticity of the labor supply are large enough. We also show that if labor externalities are slightly stronger, but still small enough to be plausible, and the elasticity of labor supply is larger, local indeterminacy occurs in a Cobb-Douglas economy. Finally, we show that a locally indeterminate steady state is generically characterized by an under-accumulation of capital. It follows therefore that while agents live over a finite number of periods, the conditions for the existence of locally indeterminate equilibria are very similar to those obtained within infinite horizon models and that from this point of view, Diamond meets Ramsey.     

Imperfectly competitive cycles with Keynesian and Walrasian features

We consider a multi-sector overlapping generations model with oligopolistic firms in the output markets and wage-setting trade unions in the labour markets. A coordination problem between firms creates multiple temporary equilibria which are either Walrasian or of the Keynesian unemployment type. There exist many deterministic and stochastic equilibrium cycles fluctuating between Keynesian recession and Walrasian boom periods with arbitrarily long phases in each regime. The cycles are in accordance with certain empirical regularities. Money is neutral and superneutral, but appropriate countercyclical fiscal policies stabilize the cycles in a textbook Keynesian way.     

On graduation from fiscal procyclicality

In the past, industrial countries have tended to pursue countercyclical or, at worst, acyclical fiscal policy. In sharp contrast, emerging and developing countries have followed procyclical fiscal policy, thus exacerbating the underlying business cycle. We show that, over the last decade, about a third of the developing world has been able to escape the procyclicality trap and actually become countercyclical. We then focus on the role played by the quality of institutions, which appears to be a key determinant of a country’s ability to graduate. We show that, even after controlling for the endogeneity of institutions and other determinants of fiscal procyclicality, there is a causal link running from stronger institutions to less procyclical or more countercyclical fiscal policy.     

Fiscal policy,rent seeking,and growth under electoral uncertainty: theory and evidence from the OECD

Abstract. We construct a general equilibrium model of economic growth and optimally chosen fiscal policy, in which individuals compete with each other for a share of government spending and two political parties alternate in power according to exogenous electoral uncertainty. The main prediction is that uncertainty about remaining in power results in increased fiscal spending, which in turn distorts incentives by pushing individuals away from productive work to rent‐seeking activities; then, distorted incentives hurt growth. This scenario receives empirical support in a dataset of 25 OECD countries over the period 1982–96. In particular, uncertainty about remaining in power leads to larger government shares in GDP, which in turn exert an adverse effect on the ICRG index measuring incentives and this is bad for growth.     

QUEST III: An estimated open-economy DSGE model of the euro area with fiscal and monetary policy

This paper develops a DSGE model for an open economy and estimates it on euro area data using Bayesian estimation techniques. The model features nominal and real frictions, as well as financial frictions in the form of liquidity-constrained households. The model incorporates active monetary and fiscal policy rules (for government consumption, investment, transfers and wage taxes) and can be used to analyse the effectiveness of stabilisation policies. To capture the unit root character of macroeconomic time series we allow for a stochastic trend in TFP, but instead of filtering data prior to estimation, we estimate the model in growth rates and stationary nominal ratios.     

A risk-driven approach to exchange rate modelling

The paper presents a new approach to exchange rate modelling that augments the CHEER model with a sovereign credit default risk as perceived by financial investors making their decisions. In the cointegrated VAR system with nine variables comprised of the short- and long-term interest rates in Poland and the euro area, inflation rates, CDS indices and the zloty/euro exchange rate, four long-run relationships were found. Two of them link term spreads with inflation rates, the third one describes the exchange rate and the fourth one explains the inflation rate in Poland. Transmission of shocks was analysed by common stochastic trends. The estimation results were used to calculate the zloty/euro equilibrium exchange rate.     

The information content of the neutral rate of interest

The concept of the neutral rate of interest has recently received much attention from economists. In this paper, we estimate the neutral rate of interest in Poland. We show how it can yield important information for a central banker. In particular, estimation of the neutral rate can be helpful for monetary authorities seeking to stabilize inflation after a long process of disinflation. We also suggest possible explanations for the relatively high level of the neutral rate in Poland.     

Nonlinear adjustment in US bond yields: An empirical model with conditional heteroskedasticity

Starting from the work by Campbell and Shiller (Campbell, J.Y. and Shiller, R.J. (1987). Cointegration and tests of present value models. Journal of Political Economy, 95(5):1062–1088.), empirical analysis of interest rates has been conducted in the framework of cointegration. However, parts of this approach have been questioned recently, as the adjustment mechanism may not follow a simple linear rule; another line of criticism points out that stationarity of the spreads is difficult to maintain empirically.     

Fiscal policy and the Spanish business cycle

A main result of the RBC literature is that technological factors drive fluctuations of macroeconomic variables around its long-run growth path. Nevertheless, it has been shown that in some countries fluctuations of some fiscal variables may explain some of the business cycle fluctuations. In this paper I show that a result of this sort can be obtained for the Spanish economy. Specifically, I use both technological and fiscal shocks to reproduce the observed volatility of hours of work to output, hours of work to average productivity, and the negative correlation between hours and average productivity.     

Global and local determinacy in a one-step forward looking New Keynesian model

In this paper we consider a New Keynesian model for optimal monetary policy in a staggered fashion. We provide the relations of a non linear model of general economic equilibrium, implementing a suitable Taylor-type interest rate rule. We characterize the conditions that guarantee local determinacy and explore conditions under which local bifurcations of the target equilibrium may occur. Afterwards, we argue how local determinacy might be associated with global indeterminacy, providing some numerical examples.     

Stability, global dynamics and Markov equilibrium in models of endogenous economic growth

This paper studies the local and global dynamics of two-sector models of endogenous growth with economy-wide external effects and taxes on capital and labor. The local analysis classifies the parameter space depending on the number of stationary solutions and local stability of equilibria. The global analysis shows that if taxes are within certain bounds and the size of the external effects on the average level of human capital is smaller than the share of physical capital, the equilibrium path is monotone and therefore a continuous Markov equilibrium can be constructed.     

Political incentives and local government spending multiplier: Evidence for Chinese provinces (1978–2016)

This paper uses data from Chinese provinces to examine the effects of political incentives of provincial leaders on local government spending multipliers over the post-economic-reform period. The estimation based on the local projection method provides three novel findings. Firstly, the estimated cumulative relative government spending multiplier is well above unity, and it is greater in the period after 1994 compared with before 1994. Secondly, the political incentives of provincial leaders augment the local government spending multipliers, and the effects are highly significant after 1994. Thirdly, the economic boom strengthens the augmenting effects of political incentives after 1994.     

Aggregate instability under balanced-budget consumption taxes: A re-examination

We re-examine the destabilizing role of balanced-budget fiscal policy rules based on consumption taxation. Using a one-sector model with infinitely-lived households, we consider a specification of preferences derived from Jaimovich (2008) [14] and Jaimovich and Rebelo (2009) [15] which is flexible enough to encompass varying degrees of income effect. When the income effect is not too large, we show that there exists a Laffer curve, which explains the multiplicity of steady states, and that non-linear consumption taxation may destabilize the economy, promoting expectation-driven fluctuations, if the elasticity of intertemporal substitution in consumption is sufficiently larger than one and the tax rate is counter-cyclical with respect to consumption. Numerical illustrations also show that consumption taxation may be a source of instability for most OECD countries for a wide range of structural parameters? configurations. We finally prove the robustness of our conclusions if we consider a discrete-time setup.