price flexibility in developing countries evidence and implications using data for a sample of 50 developing countries the empirical investigation evaluates determinants and implications of asymmetric price flexibility price inflation is characterized by high flexibility to adjust towards full equilibrium further price inflation accelerates flexibly with unanticipated demand growth in both the upward and downward directions in most of the countries under investigation asymmetry indicates higher upward flexibility compared to downward flexibility in many countries aggregate uncertainty determines the degree of asymmetry such that price flexibility is higher with respect to expansionary demand shocks compared to contractionary shocks the higher the variability of aggregate demand across countries in contrast higher trend price inflation increases downward price flexibility across countries output variability decreases with both upward and downward price flexibility in the face of aggregate demand shocks a the views expressed in this article are those of the a

macroeconometric equivalence microeconomic dissonance and the design of monetary policy abstract macroeconometric equivalence means that estimates of dsge models using first order approximations to equilibrium conditions fail to distinguish between alternative preference technology configurations microeconomic dissonance means that the underlying microeconomic differences between ostensibly equivalent models become important when optimal monetary policy is derived the relevance of these concepts is established by analysis of optimal monetary policy using a small scale new keynesian model microeconomic and financial datasets are promising tools with which to overcome the equivalence dissonance problem

import price adjustments with staggered import contracts abstract in this paper we develop a linear rational expectations equilibrium model of staggered import contracts with incomplete exchange rate indexing to explain the slow and moderate adjustment of import prices and quantities to exchange rate changes the existence and stability of the equilibrium are proved by establishing equivalence between the solution to the equilibrium problem and the solution of an optimal linear regulator problem simulation analysis illustrates that the nature of the adjustment of import prices and quantities to exchange rate changes depends crucially on the length of the contract and the length of the delivery lag thus an alternative to the hysteresis explanation of the slow and moderate adjustment of import prices and quantities to exchange rate changes is established the new explanation however has significantly different implications for exchange rate management and trade policies

limited rationality and strategic interaction the impact of the strategic environment on nominal inertia much evidence suggests that people are heterogeneous with regard to their abilities to make rational forward looking decisions this raises the question as to when the rational types are decisive for aggregate outcomes and when the boundedly rational types shape aggregate results we examine this question in the context of a long standing and important economic problem the adjustment of nominal prices after an anticipated monetary shock our experiments suggest that two types of bounded rationality money illusion and anchoring are important behavioral forces behind nominal inertia however depending on the strategic environment bounded rationality has vastly different effects on aggregate price adjustment if agents actions are strategic substitutes adjustment to the new equilibrium is extremely quick whereas under strategic complementarity adjustment is both very slow and associated with relatively large real effects this adjustment difference is driven by price expectations which are very flexible and forward looking under substitutability but adaptive and sticky under complementarity moreover subjects expectations are also considerably more rational under substitutability

inflation nominal interest rates and the variability of output abstract this paper examines the distribution of output around capacity when money demand is a nonlinear function of the nominal interest rate such that nominal interest rates cannot become negative when fluctuations in output result primarily from disturbances to the money market the variance of output is shown to be an increasing function of the trend inflation rate when they result from disturbances to the goods market the variance of output is a decreasing function of the trend inflation rate when both disturbances are significant there exists in general a critical non zero trend inflation rate that minimizes the variance of output

note comment on a generalized quantity discount pricing model to increase supplier s profits lee and rosenblatt lee h l m j rosenblatt 1986 a generalized quantity discount pricing model to increase supplier s profits management sci 32 9 1177 1185 considered the joint problem of ordering and offering discount by a supplier to his sole buyer the objective of the supplier being to induce the buyer to alter his order quantities in order to increase the supplier s yearly profit they determined the optimal ordering and pricing policy for the supplier under the constraint on the amount of discount offered to the purchaser this restriction on the amount of price discount seems unreasonable when the objective of the supplier in all likelihood is to increase his own profits it is possible that higher discounts in purchase price may lead to greater economies for the supplier in this note a much simpler approach is being offered for determining the optimal ordering and pricing policy for the supplier

empirical evidence on inflation expectations in the new keynesian phillips curve abstract we review the main identification strategies and empirical evidence on the role of expectations in the new keynesian phillips curve paying particular attention to the issue of weak identi

evaluating unemployment policies what do the underlying theories tell us the paper surveys unemployment policies for advanced market economies and evaluates them by examining the predictions of the underlying macroeconomic theories the basic idea is that for the most part different unemployment policy prescriptions rest on different macroeconomic theories and our confidence in the prescriptions should depend at least in part on theories ability to predict some salient stylized facts about unemployment behavior the paper considers four types of policies laissez faire demand management policies supply side policies and structural policies copyright 1995 by oxford university press

is increased nominal flexibility stabilizing some international evidence this paper studies the impact of the increased rigidity on macroeconomic fluctuations the author uses this evidence to test the validity of two major keynesian explanations the first is the conventional sticky wage sticky price explanation that suggests that the increased nominal rigidity ceteris paribus is destabilizing the second is a recently developed explanation that suggests that the increased flexibility is destabilizing the author s results are consistent with the conventional implications copyright 1991 by the london school of economics and political science

a generalized quantity discount pricing model to increase supplier s profits in this paper the joint problem of ordering and offering price discount by a supplier to his sole major buyer is analyzed the objective is to induce the buyer to alter his order schedule and size so that the supplier can benefit from lower set up ordering and inventory holding costs we generalize the quantity discount pricing model of monahan monahan j p 1984 a quantity discount pricing model to increase vendor profits management sci 30 6 720 726 to 1 explicitly incorporate constraints imposed on the amount of discount that can be offered and 2 relax the implicit assumption of a lot for lot or order for order policy adopted by the supplier an algorithm is developed to solve the supplier s joint ordering and price discount problem

optimal anti inflation programs in semi industrialized economies orthodox versus heterodox policies abstract the paper characterizes the optimal time consistent anti inflation program in a small open semi industrialized economy when policy makers choose the rate of exchange rate crawl the rate of change of fiscal spending and a wage and price control parameter to minimize deviations of output and inflation the optimal program involves a rapidly decelerating rate of crawl a sharp reduction in spending and a short initial period of wage and price controls the paper also assesses the importance of controls in helping to reduce the output loss associated with fighting inflation

output inflation cycles in an economy with staggered wage setting abstract the question whether increased price flexibility is stabilizing in macromodels of the business cycle has been recently questioned by de long and summers 1986 the present paper is an attempt to reconsider the question by applying some methods from the theory of nonlinear dynamics especially bifurcation theory to the analysis of a dynamic model with sluggish price adjustment it is argued that when inflation plays a destabilizing role through the mundell effect a stable closed orbit representing the perfect foresight dynamics of the output inflation pair may appear in the vicinity of a stationary state moreover bifurcation theory is applied to find analytical results about the relation between the amplitude of the cycles and the degree of flexibility of prices this relation is shown to be positive in a variety of cases

elusive persistence wage and price rigidities the new keynesian phillips curve and inflation dynamics abstract we review the main new keynesian inflation equations that have arisen as a result of aggregation from individual firms price rigidities we find that on the whole they cannot account for inflation persistence a key feature of the empirical dynamics of inflation and with important policy implications the only exceptions seem to be when indexation is allowed in price setting or when price stickiness is combined with wage rigidity and staggering

imperfectly credible disinflation under endogenous time dependent pricing the real effects of an imperfectly credible disinfl ation depend critically on the extent of price rigidity therefore the study of how policymakers credibility affects the outcome of an announced disinflation should not be dissociated from the analysis of the determinants of the frequency of price adjustments in this paper we examine how the policymaker s credibility affects the outcome of an announced disinflation in a model with endogenous time dependent pricing rules both the initial degree of price ridigity calculated optimally and more notably the changes in contract length during disinflation play an important role in the explanation of the effects of imperfect credibility we initially evalute the costs of disinfl ation in as etup where credibility is exogenous and then allow agents to update beliefs about the type of monetary authority that they face we show that in both cases the interaction between the endogeneity of time dependent rules and imperfect credibility increases the output costs of disinflation

inflationary inertia in a wage price spiral model abstract this paper examines theoretical issues of inflationary inertia by use of a wage price spiral model in which wage and price decisions are staggered it is shown that within such a framework inflation is inertial in the following sense a monetary disinflation cannot immediately succeed and the rate of inflation declines gradually it is also shown that from another aspect of inflationary inertia which is the effect of cost shocks inflation is less inertia even in a wage price spiral model a temporary cost shock has no continuing effect on the rate of inflation only permanent changes in costs have an inertial effect and they raise the rate of inflation in consecutive periods as well

reconciling the wage curve and the phillips curve the wage curve is the negative relationship that links wage levels to the unemployment rate it fits accurately with modern non competitive labour market models but goes against a phillips curve modelling because the latter ties wage growth to the unemployment rate in this article we present a comprehensive review of these non competitive models highlighting recent contributions that try to eliminate the possible gap that exists between the concepts of the wage curve on the one hand and the phillips curve on the other copyright blackwell publishers ltd 2005

predetermined prices and the persistent effects of money on output this note illustrates a model of predetermined pricing where firms set a fixed schedule of nominal prices at the time of price readjustment based on the work of fischer 1977 this contrasts with the model of fixed pricing the specification underlying most recent dynamic sticky price models it is well known that predetermined pricing cannot generate substantial persistence in the real effects of monetary shocks when prices are set via fixed duration contracts unless the contracts are of long duration however we show that with a probabilistic model of price adjustment a predetermined pricing specification can produce almost as much persistence as the more conventional model of fixed prices without the assumption of long average contract duration

real and nominal shocks in a two country price setting world abstract this paper develops a two country model in which the law of one price does not hold in the short run and which is consistent with the stylized fact that exchange rates respond more quickly to news than prices this is done by assuming that firms face lumpy information costs in determining what price to charge both domestic and imported goods prices are therefore sticky with respect to news and deviations from the law of one price ppp are due to exchange rate surprises the model is used to analyze the domestic and international impact of real and nominal disturbances

monetary policy trend inflation and the great moderation an alternative interpretation with positive trend inflation the taylor principle does not guarantee a determinate equilibrium we provide new theoretical results on determinacy in new keynesian models with positive trend inflation and new empirical findings on the federal reserve s reaction function before and after the volcker disinflation to find that i while the fed likely satisfied the taylor principle before volcker the us economy was still subject to self fulfilling fluctuations in the 1970s ii the us economy switched to determinacy during the volcker disinflation and iii the switch reflected changes in the fed s response to macroeconomic variables and the decline in trend inflation jel e12 e23 e31 e32 e52

the new keynesian phillips curve revisited abstract several authors have questioned the evidence claimed by gali and gertler 1999 and gali et al 2001 that a hybrid version of the new keynesian phillips curve approximates european and us inflation dynamics quite well we re examine the evidence using the vector autoregressive framework and likelihood based methods paying particular attention to the stationary and nonstationary and possibly cointegrated nature of variables involved our results show that the exact as well as the inexact form of the hybrid nkpc are clearly at odds with the european data on the other hand gali and gertler 1999 finding that the inexact hybrid nkpc is a good first approximation to the us inflation dynamics seems less at odds with the data however the assumption of the model that the stochastic term forms a sequence of innovations may be problematic as we find indication of autocorrelation in the estimated residuals the exact form of the hybrid nkpc is firmly rejected by the us data

hyperbolic discounting and the phillips curve using a standard dynamic general equilibrium model we show that the interaction of staggered nominal contracts with hyperbolic discounting leads to inflation having significant long run effects on real variables

selection and monetary non neutrality in time dependent pricing models for a given frequency of price adjustment monetary non neutrality is smaller if older prices are disproportionately more likely to change selection for the age of prices provides a complete characterization of price setting frictions in time dependent models selection for older prices is weaker and non neutralities are larger if the hazard function of price adjustment is less strongly increasing selection is weaker if there is heterogeneity in price stickiness finally selection is weaker if durations of price spells are more variable in particular the taylor 1979 model exhibits maximal selection for older prices whereas the calvo 1983 model exhibits no selection

note comments on a quantity discount pricing model to increase vendor profits monahan monahan j p 1984 a quantity discount pricing model to increase vendor profits management sci june 720 726 adapted the quantity discount model of inventory theory to the problem of determining an optimal quantity discount schedule from a vendor s point of view and opened up an important direction of research however his one item one customer one vendor model is based on several implicit assumptions that must be judged unreasonable monahan must account for the vendor s inventory carrying charges and redefine his variable s2 it is shown that a rational vendor s manufacturing frequency would not be identical to the buyer s ordering frequency if the vendor s manufacturing setup costs are substantially larger than the buyer s ordering costs a numerical example presented in this note also questions the practical usefulness of monahan s model even after its theoretical inaccuracies axe corrected monahan s model may explain discounts that are a fraction of 1 of the price of an item but it fails to explain commonly observed magnitudes of quantity discounts such as 10 of the unit price

okun s micro macro system a review article prices and quantities is the brilliant and disturbing last work of arthur m okun 1928 1980 for more than a decade okun was the foremost practitioner of macroeconomics in the united states his critical intelligence at both the theoretical and empirical ends of economics was unsurpassed these facts were virtually a manufacturer s warranty that the book whatever its argumentation and evidence would be significant we want to know what okun thought but this background was no guarantee of an important treatise and it must have taken some courage to venture a big theoretical work in an accessible style on urgent questions in fact okun has delivered a creative and virtuosic study in economic theory the book s contribution is to provide a complete description of an economy in which rational economic agents consider the distributional consequences of wage and price decisions the perspective adopted one which is winning growing favor of late is contract theoretic because they wish to economize on their costly transactions with one another people trade repeatedly with the same agent so trust and fidelity to understandings are important the ensuing analysis lodges some basic dissents from the informational expectational paradigm developed over the last score of years it is particularly stimulating and troubling on the main policy controversy of the decade the question of disinflation

on the real effects of short and long run inflation and relative sector price variability some empirical evidence using the kalman filter this paper evaluates empirically the effects of sector relative price variability and short run and long run inflation on the growth rate of real output in the united states since 1947 also permanent and transitory estimates are constructed to evaluate the effects of unanticipated movements in sector relative price on the growth rate of real output the results show a statistically significant inverse relationship beween the growth rate of real output and transitory sector relative price variability and anticipated long run inflation and a direct relationship between the growth rate of real output and unanticipated short run inflation

note an acquisition policy for a single item multi supplier system in this paper we consider the problem of developing an acquisition policy specifically given a set of potential qualified suppliers from whom should the firm buy the product in what quantities and how often we provide properties of the optimal solution and relate them to the approach of using a single source as advocated by jit the solution procedure provides the periodic order quantity from each supplier the order size and the firm cycle time as well as how many times per cycle we should order from each supplier we show that the maximum error of our solution can be made as small as desired

real effects of anticipated and unanticipated money some problems of estimation and hypothesis testing abstract the paper addresses two issues that arise in estimation and testing of the real effects of anticipated and unanticipated money first it is shown that identification of the effects of unanticipated or unperceived monetary growth on real output is possible only if the a priori restriction is imposed that monetary growth does not depend on unanticipated or unperceived output second the existing empirical work of barro and others does not allow for three known channels through which money can affect real variables these are 1 past and present anticipations of future monetary growth the inflation tax channel 2 expectations of monetary growth in a given period conditioned at various preceding dates the fischer phelps taylor effect and 3 past and present revisions in forecasts of future monetary growth the presence of the first of these would mean that alternative open loop monetary growth rules have real effects the presence of the other two implies that monetary feedback rules can have real effects omission of the first channel can lead to biased estimates of the effects of past anticipated monetary growth potentially serious observational equivalence problems are associated with the other two

the patman effect and stabilization policy this paper examines the controversial link between interest rates and prices by introducing interest costs into john taylor s model of overlapping wage contracts we find that the presence of interest costs does affect the stabilization process and can make the tradeoffs between output and price variability less favorable

persistency in sticky price models abstract nominal rigidities imply that nominal shocks have an impact effect which may be propagated by standard mechanisms however the nominal adjustment process may in itself be a propagation mechanism causing persistent effects of nominal shocks this may be caused by inertia in nominal wage and price adjustment arising due to input output networks or multiperiod nominal contracting as captured in models with staggered price wage decisions it has recently been contested whether staggering can account for persistency of any quantitative importance this paper reviews the theory and empirical evidence on this issue and it is concluded that staggering may be a quantitative important propagation mechanism

changes in the cyclical pattern of real wages evidence from nine countries 1955 80 monetary policy in the united kingdom the monetarist vice has gripped the economy even longer and similar deflationary policies have been in effect in other western economies interestingly enough these policies were instituted in the context of a prolonged period of economic decline annual average rates of growth of gross domestic product for nine oecd countries fell from 6 8 to 5 o to 2 6 over the periods i955 66 i966 73 and i973 79 2 similarly unemployment has risen dramatically in the last io years the causes of slow growth and high unemployment are undoubtedly various however it is clear that restrictive macroeconomic policy has played an important role that is the recent situation is at least in part attributable to a deliberate effort to induce an economic slump the task of systematically examining the origins and motivations of this policy still awaits us however this paper presents an account of a general development in the pattern of real wages over the business cycle which is a plausible determinant of current policy the evidence indicates that short run cyclical movements in output no longer exert a determinate influence on real wage growth a development which may have been the impetus for long term deflation this account is based on an econometric study of nine countries over the period i955 80 the study has three noteworthy econometric features the first is that data from the nine countries are combined in a pooled model with homogeneous coefficients the use of a cross national sample ensures against the attribution of general theoretical status to particular empirical findings from a single country 3 second the units of observation are business cycle turning

the singapore dollar tests of the efficient markets hypothesis and the role of news in this paper the efficient markets hypothesis emh is tested for the singapore dollar over the period from january 1978 to march 1983 the tests are conducted using the relationship between the spot foreign exchange rate and the corresponding lagged forward foreign exchange rate the tests consist of an unbiasedness test an error orthogonality test and a test of the impact of news in the singapore foreign exchange market the results indicate a certain degree of independence in the implementation of monetary policy for the singapore monetary authority

the evolution of regional income distribution in japan using data on per capita income of japan s 47 prefectures between 1955 and 1997 this paper shows that one of the most popular measurements of convergence convergence is not invariant with both transformation and definition of dispersion measured by the standard deviation the actual per capita income has diverged whereas measured by the coefficients of variation it has converged since 1955 the log of per capita income and relative income of all prefectures to tokyo however have converged regardless of the measurement of dispersion in addition through the estimation of density function and transition matrix the intradistribution dynamics of each prefecture s per capita income is identified

output effects of a tariff under flexible exchange rates abstract a tariff s impact on output is shown to depend on the asset market structure if foreigners do not hold the domestic asset as is generally assumed in the previous literature the tariff induced current account surplus creates a large enough currency appreciation that demand for domestic output falls when foreigners hold the domestic asset the current account surplus results in an international transfer of assets which allows a smaller currency appreciation the more similar are asset preferences across countries the smaller is the appreciation and therefore the greater is the likelihood that domestic output will increase

an exact policy for enhancing buyer supplier linkage in supply chain system abstract kim s l and ha d 2003 a jit lot splitting model for supply chain management enhancing buyer supplier linkage international journal of production economics 86 1 10 proposed a novel cooperative method for synchronizing supply with actual customer demand in a just in time scenario however all decision variables obtained using their model may not be integers making it difficult to be implemented in fixed cycle applications i e a planning horizon of one time period in addition their model can only be used to solve joint optimization for single buyer and single supplier furthermore problems arise when resource constraints are added to their model because traditional inventory models do not allow constraints to be added by the decision maker arbitrarily to improve the practical utility of the model of kim and ha 2003 we derive a mixed integer optimization approach which not only can be applied to the joint optimization for the multi buyer and single supplier but also all decision variables obtained are executable integers for the planning horizon of one time period to suit real world situations infinite planning horizon scenario is also considered in this study in addition illustrative examples are included to demonstrate the usefulness of the proposed models in which the integrated purchase policy being superior to independent optimization can be clearly seen moreover the analytical superiority of the proposed models in terms of execution time can be seen through a computational experiment conduced on a set of logical number of buyers in the multi buyer and single supplier problem finally the performance of various approaches i e proposed models and genetic algorithm is also examined to provide valuable insight into the practical problem

counterinflationary policy in a unionised economy with nonsynchronised wage setting a model of the determination of wages and employment in a unionised economy with nonsynchronised wage setting is presented in this paper it is shown that a monetary deflation can lead to prolonged unemployment even though the unions act rationally and with full information about the change in policy the model generates a statistical phillips curve in which the rate of change of money wages depends on the anticipated growth rate of the money supply and on disequilibrium unemployment conventional incomes policies are shown to have desirable social effects but run counter to the perceived self interest of the trade unions and are therefore likely to be resisted taxes on wage increases have desirable long run effects but do not appear able to reduce the transitional unemployment costs of monetary deflation

money income and prices in singapore reconsidered 1990 money income and prices in singapore reconsidered applied economics vol 22 no 5 pp 653 668

trade unions wage formation and macroeconomic stability an introduction the process of wage formation is a crucial aspect of the current discussion about the causes of stagflation in fact differences between various policy prescriptions usually depend on differing assumptions about wage responses proposals to reduce unemployment through expansion of monetary demand are usually based on assumptions of rigid money wages in contrast recommendations of non intervention policies often rest on the opposite assumption of rigid real wages in which case monetary expansion will cause inflation but not affect employment

inflationary rigidities and orthodox stabilization policies lessons from latin america orthodox stabilization programs in latin american countries have been notoriously unsuccessful in combating inflation despite the imposition of stringent cuts in government deficits in most cases inflation came down only slowly and temporarily with concomitant declines in growth and employment the bolivian program one of the only latin american successes is contrasted with those of argentina brazil chile and mexico the problems of dealing with chronic inflation are compared with those of hyperinflationary countries and the influence of price and wage rigidities expectations and credibility is explored the study shows that fiscal restraint is a necessary but not sufficient condition for success and that sound management of nominal variables the exchange rate and money supply are also necessary the critical role of credibility is linked with price and wage rigidities in the chronic inflation countries whereas the unsuitability of hyperinflation is seen to increase the credibility of and thus the potential for successful stabilization programs

does the law of one price hold in a high inflation environment a tale of two cities in turkey this study addresses the price convergence in two cities in turkey istanbul and ankara using annual data over the three quarters of the twentieth century 1922 1998 characterized by prevailing high inflation rates for most of the period in contrast to the rest of the literature addressing convergence in price levels with a typical result of extremely slow convergence rates at best we argue that convergence is much easier detected in growth rates rather than levels of prices we suggest using the bounds testing procedure of pesaran et al 2001 for this purpose we find a clear cut evidence on the existence of a common driving force behind inflation dynamics in istanbul and ankara a finding that is in contrast with the results typically reported in related literature

a one vendor multi buyer integrated inventory model abstract we consider a one vendor multi buyer integrated inventory model the vendor seeks to minimize his total annual cost subject to the maximum costs which buyers are prepared to incur in order to implement this model the vendor only needs to know buyer s annual demand and previous order frequency which can be inferred from buyer s past ordering behavior we find the optimal solution for the one vendor one buyer case and present a heuristic approach for the one vendor multi buyer case

staggered vs synchronised wage setting in oligopoly abstract this paper analyses the dynamic equilibrium which emerges when wages are bargained upon at different times in the various firms operating in an oligopolistic industry unions set wages the management of the firms the output level and the outcome of this interaction is captured by the game theoretic concept of markov perfect equilibrium the steady state equilibrium is compared with that which would emerge if all wage negotiations occurred simultaneously it is shown that staggered wage setting leads to higher steady state levels of wage and unemployment than synchronised wage setting it is also shown that a longer duration for wage contracts leads other things equal to lower wages and higher employment the final part of the paper shows that allowing for nash bargaining between union and management and for risk averse unions does not alter the conclusions of the paper

inertial inflation indexation and price stickiness evidence from brazil abstract this paper evaluates the inertial inflation hypothesis for brazil the hypothesis posits that indexation created a feedback mechanism such that one time supply shocks were fully transmitted into permanent changes in inflation a theoretical model is used to show that this outcome is based on the assumption of perfect price flexibility however with price stickiness indexation does not produce inertial inflation the degree of inertia is then compared for two periods one without indexation 1945 1963 and one with indexation 1969 1985 finally vector autoregressive representations are estimated for the latter period allowing for price stickiness the empirical results do not support the hypothesis

the optimal inflation rate in new keynesian models should central banks raise their inflation targets in light of the zero lower bound we study the effects of positive steady state inflation in new keynesian models subject to the zero bound on interest rates we derive the utility based welfare loss function taking into account the effects of positive steady state inflation and solve for the optimal level of inflation in the model for plausible calibrations with costly but infrequent episodes at the zero lower bound the optimal inflation rate is low typically less than two percent even after considering a variety of extensions including optimal stabilization policy price indexation endogenous and statedependent price stickiness capital formation model uncertainty and downward nominal wage rigidities on the normative side price level targeting delivers large welfare gains and a very low optimal inflation rate consistent with price stability these results suggest that raising the inflation target is too blunt an instrument to efficiently reduce the severe costs of zero bound episodes

staggered price contracts and inflation persistence some general results despite their popularity as theoretical tools for illustrating the effects of nominal rigidities some have questioned whether models based on staggered price contracts with rational expectations can match the persistence of the empirical inflation process this article presents some general results about this class of models it is shown that these models do not have a problem matching high autocorrelations for inflation however they fail to explain a key feature of reducedform phillips curve regressions the positive dependence of inflation on its own lags it is shown that staggered price contracting models instead predict that the coefficients on these lag terms should be negative

price adjustments in a general model of state dependent pricing we study the distribution of retail price adjustments under the assumption that firms are more likely to adjust their prices when doing so is more valuable our setup nests calvo 1983 at one extreme and a fixed menu cost model at the other all parameterizations are ranked by a measure of state dependence high state dependence implies counterfactually that there are no small price changes and that the variance of price changes falls sharply with trend inflation the parameterization that best fits microdata has low state dependence implying a phillips curve coefficient 60 as large as that of the calvo model but is nonetheless well behaved at high inflation rates

the cross sectional distribution of price stickiness implied by aggregate data we provide evidence on three mechanisms that can reconcile frequent individual price changes with sluggish aggregate price dynamics to that end we estimate a semistructural model that can extract

monetary policy trend inflation and unemployment volatility the literature has long agreed that the dmp model after diamond 1982 mortensen 1982 pissarides 1985 with search and matching frictions in the labor market can deliver large volatilities in labor market quantities consistent with empirical data only if there is at least some wage stickiness i show however that the model can deliver nontrivial volatilities without wage stickiness as long as it has price dispersion and nonzero long run inflation rates i find that by keeping inflation at a positive rate monetary policy may be accountable for the large standard deviations observed on labor market variables in addition the shimer 2005 puzzle disappears under monetary policy shocks

services inflation dynamics and persistence puzzle in brazil a time varying parameter approach this article analyses services inflation dynamics in brazil focusing on the services inflation persistence puzzle for monthly data from january 2004 to february 2016 we apply a time varying para

price wage dynamics and inflation in socialist economies empirical models for hungary and poland this article analyzes the determinants of open inflation in transitional socialist economies with reference to recent experience in hungary and poland a simple inflation model is centered on the transmission process and on the short run dynamics of inflation further incorporating a number of features specific to socialist economies and working with quarterly data dynamic price and wage equations are estimated the estimated equations allow satisfactory exploration of the role and weight of foreign prices and domestic factors in propagating inflation foreign prices matter but developments on the cost side are critical in relating exogenous policy driven adjustments to the price level to increases in the rate of inflation the absence of conventional market based equilibrating mechanisms requires that nominal anchors particularly wage restraints feature prominently in any stabilization program adopted by reforming socialist economies copyright 1992 by oxford university press

monetary targets real exchange rates and macroeconomic stability abstract in this paper i develop a model to determine the optimal degree of flexibility in attaining monetary targets in an economy that is affected by shocks in the labor and financial markets i then simulate the model to assess the optimal degree of monetary policy flexibility in spain a country that has adopted monetary targets rigidly since 1978 i show that the model supports the policy choice of that country i also show that the monetary authorities should attribute more importance to real exchange rate movements in choosing their policies if the spanish economy becomes more open to international trade or if the labor market becomes more flexible

the return of the liquidity effect a study of the short run relation between money growth and interest rates in this article i use band pass filters to investigate the short run relationship between money growth and interest rates i find a negative correlation between short run movements in money growth and interest rates which i interpret as evidence that the liquidity effect dominates the anticipated inflation effect

trend inflation wage and price rigidities and productivity growth abstract what are the steady state implications of inflation in a general equilibrium model with real per capita output growth and staggered nominal price and wage contracts surprisingly a benchmark calibration implies an optimal inflation rate of 1 9 percent the analysis also shows that trend inflation has important effects on the economy when combined with nominal contracts and real output growth steady state output and welfare losses are quantitatively important even for low values of trend inflation further nominal wage contracting is found to be quantitatively more important than nominal price contracting in generating the results this conclusion does not arise from price dispersion per se but from an effect of nominal output growth on the optimal markup of monopolistically competitive labour suppliers finally accounting for productivity growth is found to be important for calculating the welfare costs of inflation indeed the presence of 2 percent productivity growth increases the welfare costs of inflation in the benchmark specification by a factor of four relative to the no growth case

price flexibility and aggregate stability new evidence and implications i introduction is increased price flexibility stabilizing the importance of this question can be easily established by observing the number of recently published papers in which this question or a slight modification of it has appeared in their titles 1 while most economists would answer this question affirmatively a strand of macroeconomic thought that questions the wisdom of too much price flexibility has recently regained some attention 2 in the most widely discussed of this recent literature delong and summers 1986b question the wisdom of too much price flexibility their work was motivated by some of the ideas expressed by keynes 1936 and formally articulated by james tobin 1975 low prices work to move the economy to full employment but falling prices to the extent that they lead to expectations of deflation raise the real interest rate through the mundell effect and move the economy away from full employment in a version of taylor s 1979 wage setting model delong and summers show that instability is likely to occur if expectations of inflation adjust rapidly to actual inflation and the real interest rate effect is large this view presents a direct challenge to mainstream keynesian models of business cycles 3 according to these models sluggish wages and prices are generally the culprits of unemployment and business fluctuations an exogenous institutional increase in the degree of price inflexibility increases the size of quantities adjustment in response to aggregate demand shocks in the current period and over time the assumption of exogeneity is consistent with the view that wage and price rigidity are the result of an institutional structure that is relatively unresponsive to changes in the underlying economic conditions in gray and kandil 1991 we find this view unappealing considering recent efforts to rationalize nominal rigidities as the outcome of explicit optimization exercises 4 it is for this reason that we examine the relationship between price flexibility and output variability in a framework in which both are endogenously determined in the model we develop price rigidity is attributed to the length of contractual wage agreements an increase in contract length will occur if the costs of negotiating contracts rise or the amount of uncertainty impinging on the economy declines in the first case declines in wage and price flexibility will be accompanied by decreased stability of output in the latter case the opposite will occur the reduction in the size of stochastic disturbances impinging on the economic system has a direct stabilizing impact on real output concurrently the reduction in the degree of uncertainty increases agents incentives to write longer contracts the increased rigidity is destabilizing this destabilizing impact is dominated however by the direct stabilizing impact the implications of the alternative views can be contrasted in many respects in kandil 1991b i test the relation between measures of wage and price flexibility and the size of macroeconomic fluctuations across a group of ten major industrial countries the analysis of this paper extends this research in several directions first the analysis provides a formal illustration of the channels through which price flexibility may differentiate the real effects of specific shocks underlying aggregate demand and in turn aggregate variability the framework approximates the key relationships for the theoretical debate under consideration these relationships are replicated empirically to establish the validity of the hypotheses that differentiate the alternative views second the analysis provides a more formal attempt towards quantifying the structural shocks underlying aggregate demand these shocks are the driving forces of economic instability and in turn they are crucial to the debate on the stabilizing effects of price flexibility

output persistence from monetary shocks with staggered prices or wages under a taylor rule we analytically examine output persistence from monetary shocks in a dsge model with staggered prices or wages under a taylor rule surprisingly while taylor style staggering never yields persistence calvo style staggering of wages does generate persistence under decreasing returns to labour c 2009 elsevier b v all rights reserved

the joint economic lot size problem a review abstract this article reviews lot size models which focus on coordinated inventory replenishment decisions between buyer and vendor and their impact on the performance of the supply chain these so called joint economic lot size jels models determine order production and shipment quantities from the perspective of the supply chain with the objective of minimizing total system costs this paper first describes the problem studied introduces the methodology of the review and presents a descriptive analysis of the selected papers subsequently papers are categorized and analyzed with respect to their contribution to the coordination of different echelons in the supply chain finally the review highlights gaps in the existing literature and suggests interesting areas for future research

unemployment as excess supply of labor implications for wage and price inflation abstract the introduction of both market clearing wages and nominal rigidities on wage setting can be used to rationalize unemployment as excess supply of labor in the new keynesian model as a result wage inflation dynamics are forward looking and depend negatively on the rate of unemployment moreover both price inflation and wage inflation evolve as indicated by equations equivalent to those obtained in erceg et al 2000 though with different slope coefficients in an equal volatility comparison the model with unemployment conveys less price stickiness and more wage stickiness

on the evolution of the world income distribution the post world war ii period has seen substantial changes in the distribution of gdp per worker around the world in the upper half of the distribution a number of countries have exhibited large increases in income relative to the richest countries in the bottom half several countries have seen incomes fall relative to the richest countries the net result of these changes is a movement in the shape of the world income distribution from something that looks like a normal distribution in 1960 to a bi modal twin peaks distribution in 1988 projecting these changes into the future suggests a number of interesting ndings first it seems likely that the united states will lose its position as the country with the highest level of gdp per worker second growth miracles have been more common in recent decades than growth disasters if these dynamics continue the future income distribution will involve far more rich countries and far fewer poor countries than currently observed

staggering the optimal monetary rule and persistence abstract the purpose of this paper is to show that persistence is not an attribute that derives from the characteristics of wage and price setting alone the structure of demand the monetary rule and the welfare loss function are also crucial determinants of the time series characteristics of the model

wage interdependence through decentralized bargaining abstract the idea that sector specific unions are influenced by the wages obtained by other unions has mainly been used to support the empirical observation that wages are highly correlated among industries the sources of wage interdependence can mainly be found in unions preferences in the nature of technology and in price and demand determination the presence of externalities and of strategic complementarity among unions leads to suboptimal equilibria which generates non desired inflation unemployment and possibly also trade balance deficit this enforces the idea that part of current unemployment can be eliminated by improving the cooperation between social actors

accommodation price flexibility and fluctuations abstract we show that in an economy where output fluctuations are driven primarily by aggregate demand shocks allowing a contemporaneous response of nominal wage contracts to actual market conditions in the period of the reopening of a contract invalidates taylor s second order phillips curve and delong and summers destabilizing output effects of increased price flexibility

real exchange rates and macroeconomics evidence and theory since the early 1980s a large body of research has thrown doubt on the relevance of macroeconomic models for understanding exchange rates the authors argue that a balanced reading of recent literature in exchange rate economics gives a more optimistic assessment many studies have established the pertinence of long run purchasing power parity ppp and the explanatory power of macroeconomic fundamentals in real exchange rate fluctuations a reasonably strong case can be made for a traditional macroeocnomic interpretation of real exchange rates which emphasizes short run price stickiness but long run ppp but a central new ingredient in this interpretation is the presence of international commodity market segmentation and persistent deviations from the law of one price an example is given of a dynamic general equilibrium model that can reproduce some of the observed features of real exchange rate fluctuations

is there a unit root in the inflation rate evidence from sequential break and panel data models summary using sequential trend break and panel data models we investigate the unit root hypothesis for the inflation rates of thirteen oecd countries with individual country tests we find evidence of stationarity in only four of the thirteen countries the results are more striking with the panel data model we can strongly reject the unit root hypothesis both for a panel of all thirteen countries and for a number of smaller panels consisting of as few as three countries the non rejection of the unit root hypothesis for inflation is very fragile to even a small amount of cross section variation 1997 john wiley sons ltd

surprise party estimating the consequences of unexpected presidential election results alesina s quarterly journal of economics 102 651 678 1987 influential model of presidential elections with ideologically motivated parties attributes higher growth and lower unemployment under democratic presidents to the surprise inflation a democratic victory entails in contrast to the published literature we test this hypothesis using calcula tions of presidential election surprises consistent with the assumption of rational economic actors we confront the econometric complications attending a time series approach tak ing into account economic growth dynamics we ultimately fail to confirm the hypothesis that the level of uncertainty associated with presidential election results has an effect on economic outcomes

nominal inertia and shock persistence in uk business cycles a structural var methodology is used for uk data to identify and map out the effects of innovations in the money supply employment output wages and prices moreover bands of two standard errors are computed for the impulse response functions so that comment may be made on the significance of the dynamic responses of the variables to the simulated shocks this allows conclusions to be drawn on the persistence of shocks results suggest that output variation is largely determined by aggregate demand shocks over the business cycle frequency importantly evidence is also found of rigidities in the form of price inertia and nominal wage stickiness

on the measurement of σ convergence abstract we demonstrate that two popular measures of inequality related to the discussion of convergence lead to different conclusions when used on data from penn world table the reason is that the measures assign different weights to individual countries growth performance

ambiguity monetary policy and trend inflation allowing for ambiguity or knightian uncertainty about the behavior of the policymaker helps explain the evolution of trend inflation in the us in a simple new keynesian model without resorting to exogenous changes in the inflation target using blue chip survey data to gauge the degree of private sector confidence our model helps reconcile the difference between target inflation and the inflation trend measured in the data we also show how in the presence of ambiguity it is optimal for policymakers to lean against the private sectors pessimistic expectations

the phillips curve the persistence of inflation and the lucas critique evidence from exchange rate regimes comment we present evidence from the united states and the united kingdom that the persistence of price inflation is significantly higher under managed exchange rate regimes than under gold based fixed exchange rate regimes these differences are also reflected in expectations augmented phillips curves we use a two country macro model with forward looking price setters to demonstrate that higher monetary accommodation of inflation and exchange rate accommodation of inflation differentials increase inflation persistence the evidence does not contradict this hypothesis it supports the hypothesis of forward looking price setters and highlights the empirical significance of the lucas critique jel e31 e42 f33

interview with edmund s phelps edmund s phelps has been mcvickar professor of political economy at columbia university in new york city new york since 1982 and director of the center on capitalism and society at columbia university s earth institute since 2001 in 2006 he was awarded the nobel memorial prize in economic science for his analysis of intertemporal tradeoffs in macroeconomic policy we interviewed professor phelps at his hotel in san francisco on january 3 2009 while attending the annual meeting of the allied social science associations

institutions and short run macroeconomic performance abstract this paper reviews the growing interest in institutions it argues that the explanation for this interest is a fresh awareness of how institutions affect economic performance this connection arises because many economic interaction take the form of one or other of three classic games prisoners dilemma coordination and chicken and the outcome in these games and hence performance of the economy is influenced by the institutional context of these interactions the paper provides a detailed illustration of this argument with a survey of the literature which relates unemployment performances to the institutions of wage setting in oecd countries