explaining the border effect the role of exchange rate variability shipping costs and geography this paper exploits a three dimensional panel data set of prices on 27 traded goods over 88 quarters across 96 cities in the us and japan we show that a simple average of good level real exchange rates tracks the nominal exchange rate well suggesting strong evidence of sticky prices focusing on dispersion in prices between city pairs we find that crossing the us japan border is equivalent to adding as much as 43 000 trillion miles to the cross country volatility of relative prices we turn next to economic explanations for this so called border effect and to its dynamics distance unit shipping costs and exchange rate variability collectively explain a substantial portion of the observed international market segmentation relative wage variability on the other hand has little independent impact on segmentation 2001 elsevier science b v all rights reserved

why does the cyclical behavior of real wages change over time the cyclical behavior of real wages has evolved from mildly countercyclical during the interwar period to modestly procyclical in the postwar era this paper presents a general equilibrium business cycle model that helps explain the evolution in the model changes in the real wage cyclicality arise from interactions between nominal wage and price rigidities and an evolving input output structure

the return of the wage phillips curve the standard new keynesian model with staggered wage setting is shown to imply a simple dynamic relation between wage inflation and unemployment under some assumptions that relation takes a form similar to that found in empirical applications starting with the original phillips 1958 curve and may thus be viewed as providing some theoretical foundations to the latter the structural wage equation derived here is shown to account reasonably well for the comovement of wage inflation and the unemployment rate in the u s economy even under the strong assumption of a constant natural rate of unemployment

monetary policy and exchange rate volatility in a small open economy we lay out a small open economy version of the calvo sticky price model and show how the equilibrium dynamics can be reduced to a simple representation in domestic inflation and the output gap we use the resulting framework to analyse the macroeconomic implications of three alternative rulebased policy regimes for the small open economy domestic inflation and cpi based taylor rules and an exchange rate peg we show that a key difference among these regimes lies in the relative amount of exchange rate volatility that they entail we also discuss a special case for which domestic inflation targeting constitutes the optimal policy and where a simple second order approximation to the utility of the representative consumer can be derived and used to evaluate the welfare losses associated with the suboptimal rules

using selection on observed variables to assess bias from unobservables when evaluating swan ganz catheterization distinguishing causal effects from correlations is a key objective of research regardless of field even in medicine controlled experiments are not always practical or ethical in economics and we suspect in most other fields identification strategies based upon observational data are rarely bulletproof in their landmark study a f connors et al 1996 use propensity score matching methods with an extremely rich set of demographic characteristics and health status measures to assess whether swan ganz catheterization 1c 2 a widely used device for monitoring intensive care unit icu patients raises or lowers mortality in their sample of icu patients they find that receiving c within the first 24 hours raises mortality rates casting serious doubt on the value of this procedure for critically ill patients jay bhattacharya azeem m shaikh and edward vytlacil 2007 2008 hereafter bsv observe that since c recipients are sicker on many observed dimensions propensity score matching which ignores selection on unobservables might overstate the negative consequences of c they apply a set of bounds estimators including an extension of shaikh and vytlacil 2004 that incorporates prior information that weekend applications of recent methodology in project evaluation

stabilising properties of discretionary monetary policies in a small open economy this article sets out a simple new keynesian open economy model and shows that the conduct of discretionary monetary policy in an open economy differs substantially from the closedeconomy framework the article shows analytically that the existence of the direct exchange rate channel in the open economy phillips curve impairs the perfect stabilising property of monetary policy in the face of demand side disturbances under domestic inflation targeting if cpi inflation is instead the target then the perfect stabilising property of monetary policy breaks down even in the absence of the direct exchange rate channel in the phillips curve

evaluating an estimated new keynesian small open economy model abstract this paper estimates and tests a new keynesian small open economy model in the tradition of christiano et al 2005 nominal rigidities and the dynamic effects of a shock to monetary policy journal of political economy 113 1 1 45 and smets and wouters 2003 an estimated stochastic dynamic general equilibrium model of the euro area journal of the european economic association 1 5 1123 1175 using bayesian estimation techniques on swedish data to account for the switch to an inflation targeting regime in 1993 we allow for a discrete break in the central bank s instrument rule a key equation in the model the uncovered interest rate parity uip condition is well known to be rejected empirically therefore we explore the consequences of modifying the uip condition to allow for a negative correlation between the risk premium and the expected change in the nominal exchange rate the results show that the modification increases the persistence in the real exchange rate and that this model has an empirical advantage compared with the standard uip specification

optimal monetary policy in open versus closed economies an integrated approach in clarida et al 1999 hereafter cgg we presented a normative analysis of monetary policy within a simple optimization based closedeconomy framework we derived the optimal policy rule and among other things characterized the gains from commitment also we made precise the implications for the kind of instrument feedback rule that a central bank should follow in practice in this paper we show how our analysis extends to the case of a small open economy openness complicates the problem of monetary management to the extent the central bank must take into account the impact of the exchange rate on real activity and inflation how to factor the exchange rate into the overall design of monetary policy accordingly becomes a central consideration here we show that under certain conditions the monetary policy design problem for the small open economy is isomorphic to the problem of the closed economy that we considered earlier hence all our qualitative results for the closed economy carry over to this case openness does affect the parameters of the model suggesting quantitative implications though the general form of the optimal interest rate feedback rule remains the same as in the closedeconomy case for example how aggressively a central bank should adjust the interest rate in response to inflationary pressures depends on the degree of openness in addition openness gives rise to an important distinction between domestic inflation and consumer price inflation as defined by the cpi to the extent that there is perfect exchange rate pass through we find that the central bank should target domestic inflation and allow the exchange rate to float despite the impact of the resulting exchangerate variability on the cpi kosuki aoki 1999 gali and tommaso monacelli 2000

estimating average treatment effects with continuous and discrete covariates the case of swan ganz catheterization in recent years propensity score methods have become popular for estimating average treatment effects across a variety of disciplines the propensity score is simply the probability conditional on a set of covariates of being in the treatment group the two most common estimation methods using the propensity score are matching based on the propensity score as described in paul r rosenbaum and donald b rubin 1983 and james j heckman hidehiko ichimura and petra todd 1997 hit 1997 for short and propensity score weighting psw as described for example in wooldridge 2002 and guido w imbens 2004 matching based on estimated propensity scores while often used has both practical and theoretical shortcomings inference is difficult at least partly because bootstrapping methods cannot be justified further propensity score matching is not known to be asymptotically efficient recently estimators based on propensity score weighting where the propensity scores are estimated nonparametrically have been shown to achieve the lowest possible asymptotic variance further bootstrapping can be justified for inference propensity score weighting dates back to d g horvitz and d j thomson 1952 who showed that under the assumption of ignorable sample selection inverse probability weighting can be used to obtain unbiased estimators of population moments wooldridge 2007 contains a unified framework for inverse probability weighting and describes many applications estimating average treatment effects with continuous and discrete covariates the case of swan ganz catheterization

sticky price models of the business cycle can the contract multiplier solve the persistence problem we construct a quantitative equilibrium model with firms setting prices in a staggered fashion and use it to ask whether monetary shocks can generate business cycle fluctuations these fluctuations include persistent movements in output along with the other defining features of business cycles like volatile investment and smooth consumption we assume that prices are exogenously sticky for a short time persistent output fluctuations require endogenous price stickiness in the sense that firms choose not to change prices much when they can do so we find that for a wide range of parameter values the amount of endogenous stickiness is small thus we find that in a standard quantitative model staggered price setting alone does not generate business cycle fluctuations

real wage rigidities and the new keynesian model most central banks perceive a trade off between stabilizing inflation and stabilizing the gap between output and desired output however the standard new keynesian framework implies no such trade off in that framework stabilizing inflation is equivalent to stabilizing the welfare relevant output gap in this paper we argue that this property of the new keynesian framework which we call the divine coincidence is due to a special feature of the model the absence of nontrivial real imperfections we focus on one such real imperfection namely real wage rigidities when the baseline new keynesian model is extended to allow for real wage rigidities the divine coincidence disappears and central banks indeed face a trade off between stabilizing inflation and stabilizing the welfare relevant output gap we show that not only does the extended model have more realistic normative implications but it also has appealing positive properties in particular it provides a natural interpretation for the dynamic inflation unemployment relation found in the data

low inflation pass through and the pricing power of firms abstract recently there has been a significant decline in the degree to which firms pass through changes in costs to prices a decline that is frequently characterized as a reduction in the pricing power of firms the decline appears to be associated with the decline in inflation in many countries the decline has important implications for monetary policy because it affects both forecasts of inflation and the effects of changes in monetary policy on inflation some have argued that the decline in pricing power helped to keep inflation low in the face of apparently strong demand pressures in the united states in the late 1990s this paper puts forth the view that the decline in pass through or pricing power is due to the low inflation environment that has recently been achieved in many countries first a microeconomic model of price setting is used to show that lower pass through is caused by lower perceived persistence of cost changes evidence is then presented showing that inflation is positively correlated with persistence of inflation suggesting that the low inflation itself has caused the low pass through an economy wide model consistent with the micromodel is then presented to illustrate how such changes in pricing power affect output and inflation dynamics in favorable ways but can disappear quickly if monetary policy and expectations change

optimal monetary policy with international trade in intermediate inputs abstract this paper examines optimal monetary policy in a two country new keynesian model with international trade in intermediate inputs we derive the loss function of a cooperative monetary policymaker and find that the optimal monetary policy must target intermediate goods price inflation rates final goods price inflation rates final goods output gaps and relative price gaps we use the welfare loss under the optimal monetary policy as a benchmark to evaluate the welfare implications of three taylor type monetary policy rules a main finding is that the degree of price stickiness at the stage of intermediate goods production is a key factor to determine which policy rule should be followed specifically when the degree of price stickiness at the stage of intermediate goods production is high the policymaker should follow intermediate goods ppi based taylor rule whereas cpi based taylor rule should be followed when the degree of price stickiness at the stage of intermediate goods production is intermediate or low

staggered price setting translog preferences and endogenous persistence abstract this paper generates persistent real effects of a monetary disturbance in the context of staggered price setters the model combines two related and reinforcing features a translog demand structure and a particular input output production structure these features offer a rationale why a firm when computing its own optimal contract price is influenced by the prices set in other overlapping contracts practically the two features interact in a positive manner and provide a way to generate significant endogenous persistence

economic reform in eastern europe can theory help it has been three years now since central and eastern european countries have initiated transitional reforms aimed at replacing the old system of central command and planning by a market system yet there is very little understanding among economists as to what the optional speed and sequencing of reforms should be how the restructuring and or privatisation of state owned enterprises soes should be conducted how the banking system should be redesigned and regulated how and to what extent the state should intervene in the transition process the purpose of this introductory paper is to show how simple theoretical models can shed further light on these questions and also provide some foundations for alternative non orthodox policy recommendations both on the macroeconomic and the structural sides of the transition process

endogenous business cycle propagation and the persistence problem the role of labor market frictions contrasting sharply with a recent trend in dsge modeling we propose a business cycle model where frictions and shocks are chosen with parsimony the model emphasizes a few labor market frictions and shocks to monetary policy and technology the model estimated from u s quarterly postwar data accounts well for important differences in the serial correlation of the growth rates of aggregate quantities the size of aggregate fluctuations and key comovements including the correlation between hours and labor productivity despite its simplicity the model offers an answer to the persistence problem chari et al 2000 that does not rely on multiple frictions and adjustment lags or ad hoc backward looking components we conclude modern dsge models need not embed large batteries of frictions and shocks to account for the salient features of postwar business cycles

how the world achieved consensus on monetary policy the worldwide progress in monetary policy is a great achievement and especially considering the situation 30 years ago a remarkable success story i describe how the world achieved a working consensus on the core principles of monetary policy by the late 1990s i survey the muddled state of affairs in the 1970s and then ask what happened in federal reserve policy to produce an understanding of the practical principles of monetary policy how did formal institutional support for targeting low inflation abroad follow from an international acceptance of these ideas and how did a consensus theoretical model develop in academia i explain how the modern theoretical consensus known alternatively as the new neoclassical synthesis or the new keynesian model of monetary policy reinforces key advances the priority for price stability the targeting of core rather than headline inflation the importance of credibility for low inflation and preemptive interest rate policy supported by transparent objectives and procedures of course a working consensus does not constitute complete agreement accordingly the conclusion identifies important monetary policy issues that remain to be explored

optimal monetary policy in a small open economy with staggered wage and price contracts abstract we study optimal monetary policy for a small open economy in a model where both domestic prices and wages are sticky due to staggered contracts the simultaneous presence of the two forms of nominal rigidities introduces an additional trade off between domestic inflation and the output gap we derive a second order approximation to the average welfare losses that can be expressed in terms of the unconditional variances of the output gap domestic price inflation and wage inflation as a consequence the optimal policy seeks to minimize a weighted average of these variances we analyze welfare implications of several alternative simple policy rules and find that domestic price inflation targeting generates relatively large welfare losses whereas cpi inflation targeting performs nearly as well as the optimal rule

new keynesian economics and the phillips curve models with sticky prices are an important part of new keynesian economics the author shows that several of the new keynesian models imply a formulation that is similar to the expectations augmented phillips curve of milton friedman and edmund phelps he then presents new estimates of the new keynesian phillips curve the author uses two proxies for price expectations survey based measures and an econometric based measure originally developed by bennett mccallum 1976 overall the results are consistent with the model but the survey based results are more precise suggesting that the surveys may be better measures of actual expectations copyright 1995 by ohio state university press

how well does the is lm model fit postwar u s data postwar u s time series for money interest rates prices and gnp are characterized by a multivariate process driven by four exogenous disturbances those disturbances are identified so that they can be interpreted as the four main sources of fluctuations found in the is lm phillips curve model money supply money demand is and aggregate supply shocks the dynamic properties of the estimated model are analyzed and shown to match most of the stylized predictions of the model the estimated decomposition is also used to measure the relative importance of each shock to interpret some macroeconomic episodes and to study sources of permanent shocks to nominal variables

monopolistic competition and the effects of aggregate demand how important is monopolistic competition to an understanding of the effects of aggregate demand on output we ask the question at three levels can monopolistic competition by itself explain why aggregate demand movements affect output can it together with other imperfections generate effects of aggregate demand in a way that perfect competition cannot if so can it give an accurate account of the response of the economy to aggregate demand movements the answers are no yes and yes

an optimizing is lm specification for monetary policy and business cycle analysis we ask whether relations of the is lm type can sensibly be used for the aggregate demand portion of a dynamic optimizing general equilibrium model intended for analysis of issues regarding monetary policy and cyclical fluctuations the main result is that only one change the addition of a term regarding expected future income is needed to make the is function match a fully optimizing model whereas no changes are needed for the lm function this modification leads to a dynamic forward looking model of aggregate demand that is tractable and usable with a wide variety of aggregate supply specifications theoretical applications concerning price level determinacy and gradual price adjustment are included

staggered price setting staggered wage setting and business cycle persistence abstract staggered price setting and staggered wage setting are commonly viewed as similar mechanisms in generating persistent real effects of monetary shocks in this paper we distinguish the two mechanisms in a dynamic stochastic general equilibrium framework we show that although the dynamic price setting and wage setting equations are alike a key parameter governing persistence is linked to the underlying preferences and technologies in different ways with reasonable parameter values the staggered price mechanism by itself is incapable of while the staggered wage mechanism plays an important role in generating persistence

accounting for u s real exchange rate changes this study measures the proportion of u s real exchange rate movements that can be accounted for by movements in the relative prices of nontraded goods the decomposition is done at all possible h