The role of two frictions in geographic price dispersion: When market friction meets nominal rigidity

This paper empirically investigates and theoretically derives the implications of two frictions, market friction and nominal rigidity, on the dynamic properties of intra-national relative prices, with an emphasis on the interaction of the two frictions. By analyzing a panel of retail prices of 45 products for 48 U.S. cities over the period 1985–2009, we make two major arguments. First, the effect of each type of friction on the dynamics of intercity price gaps is quite different. While market frictions arising from physical distance and transportation costs have a positive impact on volatility and persistence of intercity price dispersion, nominal rigidities have a positive impact on persistence but a negative impact on volatility. This empirical evidence is different from what is predicted by standard theoretical cross-country models based on price stickiness. Second, complementarities exist between market frictions and nominal rigidities such that the marginal effect of a market friction dwindles as nominal rigidities increase. We provide an alternative theoretical explanation for this finding by extending the state-dependent pricing (SDP) model of Dotsey et al. (1999) and show that our two-city model with nominal rigidity and market frictions can successfully explain the salient features of the dynamic behavior of intercity price differences that have not been captured in previous analysis.     

Technology shocks and labor market dynamics: Some evidence and theory

A positive technology shock may lead to a rise or a fall in per capita hours, depending on how hours enter the empirical VAR model. We provide evidence that, independent of how hours enter the VAR, a positive technology shock leads to a weak response in nominal wage inflation, a modest decline in price inflation, and a modest rise in the real wage in the short-run and a permanent rise in the long-run. We then examine the ability of several competing theories to account for this VAR evidence. Our preferred model features sticky prices, sticky nominal wages, and habit formation. The same model also does well in accounting for the labor market evidence in the post-Volcker period.     

Equilibrium Unemployment, Job Flows, and Inflation Dynamics

In order to explain the joint fluctuations of output, inflation and the labor market, this paper develops and estimates a general equilibrium model that integrates a theory of equilibrium unemployment into a monetary model with nominal price rigidities. The estimated model accounts for the responses of employment, hours per worker, job creation, and job destruction to a monetary policy shock. Moreover, search frictions in the labor market generate a lower elasticity of marginal costs with respect to output. This helps to explain the sluggishness of inflation and the persistence of output that are observed in the data.     

Productivity and unemployment over the business cycle

The low correlation between cyclical unemployment and productivity over the post-war period hides a large sign switch in the mid-1980s: from significantly negative the correlation became significantly positive. Using a search model of unemployment with nominal rigidities and variable labor effort, I show that technology shocks can generate a positive unemployment-productivity correlation whereas non-technology shocks (i.e. aggregate demand shocks) tend to do the opposite. In this context, I identify two events that can quantitatively explain the increase in the correlation: (i) a sharp drop in the volatility of non-technology shocks in the mid-1980s, and (ii) a decline in the response of productivity to non-technology shocks, which from procyclical became acyclical in the last 25 years.     

Asymmetric Labor Market Institutions in the EMU and the Volatility of Inflation and Unemployment Differentials

How does the asymmetry of labor market institutions affect the adjustment of a currency union to shocks? To answer this question, this paper sets up a dynamic currency union model with monopolistic competition and sticky prices, hiring frictions, and real wage rigidities. In our analysis, we focus on the differentials in inflation and unemployment between countries, as they directly reflect how the currency union responds to shocks. We highlight the following three results. First, we show that it is important to distinguish between different labor market rigidities as they have opposite effects on inflation and unemployment differentials. Second, we find that asymmetries in labor market structures tend to increase the volatility of both inflation and unemployment differentials. Finally, we show that it is important to take into account the interaction between different types of labor market rigidities. Overall, our results suggest that asymmetries in labor market structures worsen the adjustment of a currency union to shocks.     

Downward wage rigidity and business cycle asymmetries

The growth rates of wages, unemployment and output of a number of OECD countries have a strongly skewed distribution. In this paper we analyze to what extent downward wage rigidities can explain these empirical business cycle asymmetries. To this aim, we introduce asymmetric wage adjustment costs in a New-Keynesian DSGE model with search and matching frictions in the labor market. Increasing wages is less costly than cutting them. It follows that wages increase relatively fast and thus limit vacancy posting and employment creation, but they decline more slowly, leading to a strong reduction in vacancies and employment. The presence of downward wage rigidities strongly improves the fit of the model to the observed skewness of labor market variables and the relative length of expansions and contractions in the output and the employment cycles. The asymmetry also explains the differing transmission of positive and negative monetary policy shocks from wages to inflation.     

Monetary Shocks in a Model with Skill Loss

Unemployment shows persistent and long‐lasting responses to nominal and real shocks. Standard real business cycle models with search frictions but a homogeneous labor force are able to generate some volatility and persistence, but not enough to match the empirical evidence. Moreover, empirical studies emphasize the importance of the heterogeneity of the unemployment pool to fully understand unemployment dynamics. In particular, in most European countries the incidence of long‐term unemployment is large and well known. One of the possible causes/consequences of long‐term unemployment is the skill deterioration of the unemployment pool. In this paper, we introduce the skill loss mechanism, and therefore a heterogeneous labor force, in a New Keynesian framework with search frictions. Calibrating the model for the Spanish economy, we show that while the skill loss mechanism helps to explain the magnitude of the response of unemployment to monetary shocks, it does not improve the performance of the homogeneous worker model in terms of the persistence of the response, especially for short‐ and long‐term unemployment.     

Job uncertainty and deep recessions

We study a model where households are subject to uninsurable unemployment risk, price setting is subject to nominal rigidities, and the labor market is characterized by matching frictions and inflexible wages. Higher risk of job loss and worsening job finding prospects during unemployment depress goods demand because of a precautionary savings motive. Lower goods demand reduces job vacancies and the job finding rate producing an amplification mechanism due to endogenous countercyclical income risk. Amplification derives from the combination of incomplete financial markets and frictional goods and labor markets. The model can account for key features of the Great Recession.     

Downward Nominal Wage Rigidities Bend the Phillips Curve

We introduce a model of monetary policy with downward nominal wage rigidities and show that both the slope and curvature of the Phillips curve depend on the level of inflation and the extent of downward nominal wage rigidities. This is true for the both the long‐run and the short‐run Phillips curve. Comparing simulation results from the model with data on U.S. wage patterns, we show that downward nominal wage rigidities likely have played a role in shaping the dynamics of unemployment and wage growth during the last three recessions and subsequent recoveries.     

Oil shocks,policy uncertainty and earnings surprises

The study utilizes a structural VAR model to understand the connections among oil shocks, policy uncertainty and aggregate earnings in US. We find that the positive innovations in US oil supply increase the aggregate earnings. A rise in the US policy uncertainty decreases the aggregate earnings. After 2007 with the shale oil development in US, the earnings responses to the US oil supply shocks has increased. Over time shocks to US oil supply reduce the policy uncertainty. The development of US oil production is associated with the increase in income and the enhancement on political and economy security in US. Policy uncertainty plays an important role in the transmission of oil shocks to the earnings. The structural oil price shocks explain around 35% of the overall variations in the policy uncertainty in the long run and cause long swings in the policy uncertainty. The direct effects of oil shocks on the aggregate earnings are amplified by the endogenous responses of policy uncertainty.     

In search of the liquidity effect in a modern monetary model

This paper examines the impact of a monetary policy shock in a dynamic stochastic general equilibrium model with sticky prices and financial market frictions. First, we examine the shortcomings of monetary models emphasizing these frictions individually. The model then is specified to limit the response of prices and savings to a current period monetary disturbance. Our results show that this model can account for the following key responses to an expansionary monetary policy shock: a fall in the nominal interest rate; a rise in output, consumption, and investment; and a gradual increase in the price level. Finally, a detailed sensitivity analysis shows the model's results depend on the parameters assigned to critical structural features.     

Real price and wage rigidities with matching frictions

Frictional unemployment means that workers, for some time, are a firm-specific factor of production. This paper models the resulting interaction of wage bargaining and price setting at the firm level in a New Keynesian model with labor market matching frictions. Real rigidities arise and the labor share ceases to be a good proxy for marginal costs. The model replicates the impulse responses of an SVAR for U.S. data better than alternatives in which the real rigidities arising at the firm level are absent. In addition, it implies reasonably low degrees of nominal rigidity whereas the alternatives do not. The interaction of wage and price setting at the firm level is important for the macroeconomic dynamics.     

How Do Nominal and Real Rigidities Interact? A Tale of the Second Best

This paper analyzes the importance of real wage rigidities, in particular through their interaction with price stickiness, in a New Keynesian model. Real wage rigidities result from a combination of staggered wage setting and partial indexation of nonreset wages to past inflation. Blanchard and Galí (2007) show real rigidities to introduce a trade‐off between stabilizing inflation and the welfare‐relevant output gap. The present paper complements their findings by showing that the welfare costs of real rigidities can be substantial compared to nominal frictions. In a typical “tale of the second best,” we also show that in the presence of real wage rigidities, higher price stickiness can be welfare enhancing.     

Monetary shocks and sticky wages in the U.S. great contraction: A multi-sector approach

We quantify the role of contractionary monetary shocks and nominal wage rigidities in the U.S. Great Contraction. In contrast to conventional wisdom, we find little increase in the economy-wide real wage over 1929–33, although real wages rose significantly in some industries. In the context of a two-sector model with intermediates and nominal wage rigidities in one sector, contractionary monetary shocks account for only a third of the fall in GDP. Intermediate linkages play an important role, as the output decline without intermediates is almost a third larger at the trough. The role of nominal wage rigidities beyond their interaction with monetary shocks is limited.     

Sticky Price Models,Durable Goods,and Real Wage Rigidities

The standard two‐sector New Keynesian model with durable goods is at odds with conventional wisdom and vector autoregression (VAR) evidence: Following a monetary shock, the model generates (i) either negative or no comovement across sectoral outputs and (ii) aggregate neutrality of money when durable goods' prices are flexible. We reconcile theory with evidence by incorporating real wage rigidities into the standard model: As long as durable goods' prices are more flexible than nondurable goods' prices, we obtain positive sectoral comovement and, thus, aggregate nonneutrality of money.     

Optimal retirement with unemployment risks

This paper investigates the optimal retirement of an individual in the presence of involuntary unemployment risks and borrowing constraints in a complete market with frictions. We use an intensity model and loading factors to illustrate the involuntary unemployment risks and frictions in unemployment insurance markets. Using reasonably calibrated parameters, we observe that high involuntary unemployment intensity and loading factors could be important explanations for the empirical findings emphasized in recent studies. We also find that an individual with high leisure demand after retirement reduces consumption during retirement and increases stockholdings as retirement time approaches.     

Search Frictions,Real Rigidities,and Inflation Dynamics

The literature on New Keynesian models with search frictions in the labor market commonly assumes that price setters are not actually subject to such frictions. Here, I propose a model where firms are subject both to infrequent price adjustment and search frictions. This interaction gives rise to real price rigidities, which have the effect of slowing down the adjustment of the price level to shocks. This has a number of consequences for equilibrium dynamics. First, inflation becomes less volatile and more persistent. More importantly, the model’s empirical performance improves along its labor market dimensions, such as the size of unemployment fluctuations and the relative volatility of the two margins of labor.     

Global monetary policy shocks in the G5: A SVAR approach

The paper constructs a global monetary aggregate, namely the sum of the key monetary aggregates of the G5 economies (US, Euro area, Japan, UK, and Canada), and analyses its indicator properties for global output and inflation. Using a structural VAR approach we find that after a monetary policy shock output declines temporarily, with the downward effect reaching a peak within the second year, and the global monetary aggregate drops significantly. In addition, the price level rises permanently in response to a positive shock to the global liquidity aggregate. The similarity of our results with those found in country studies might support the use of a global monetary aggregate as a summary measure of worldwide monetary trends.     

Understanding European unemployment with a representative family model

A representative family model with indivisible labor and employment lotteries has no labor market frictions and complete markets. Nevertheless, its aggregate responses to an increase in government supplied unemployment insurance (UI) and to an increase in microeconomic turbulence are qualitatively similar to those in two macromodels with labor market frictions and incomplete markets, namely, the matching and search-island models in Ljungqvist and Sargent [2007a. Understanding European unemployment with matching and search-island models. Journal of Monetary Economics, this issue]. Because there is no frictional unemployment in the representative family model, an increase in employment protection (EP) decreases aggregate work because the representative family substitutes leisure for work, an effect opposite to what occurs in matching and search-island models. Heterogeneity among workers highlights the economy-wide coordination in labor supply and consumption sharing that employment lotteries and complete markets achieve in the representative family model. A high disutility of labor makes generous UI cause very low employment levels.