adapting prices or quantities in the presence of adjustment costs it is often hypothesized that costs of adjusting both price and quantities may have important implications for the macroeconomic adjustment process not least to nominal shocks we analyse this in an explicit intertemporal general equilibrium model considering the empirically relevant case of fixed costs of adjusting prices and fixed and variable costs of adjusting quantities we find that the presence of both price and quantity adjustment costs changes the response to shocks significantly it is an implication that small shocks do not support the menu cost case but rather both fixed prices and quantities rationing a numerical analysis based on available evidence on adjustment costs is used to illustrate the likelihood that the various adjustment patterns actually arise

business cycles theory evidence and policy implications this paper looks at recent advances in the study of aggregate fluctuations the emphasis is on three prominent areas of research the stochastic growth model economies which exhibit macroeconomic complementarities and models that emphasize heterogeneity each section of the paper outlines the theory examines relevant empirical evidence and then discusses some policy implications of the analysis

a theory of sticky rents search and bargaining with incomplete information abstract this paper offers the first theoretical explanation of housing rent stickiness and differential stickiness by housing structure type key features of rental markets worldwide previous theoretical work on the subject is sparse and explains why some landlords charge below market rents not stickiness apart from its interest for understanding housing markets and overall inflation rent stickiness is intriguing because it shows that stickiness can emerge in markets where the typical menu cost logic does not apply and where market participants typically engage in repeated bargaining over contracts our model involves search and bargaining with incomplete information in a two period game and generates stickiness in a novel manner the key decision is the landlord s choice of whether to renegotiate or not crucially landlords do not know tenant perceptions of unit quality the key force generating stickiness is that offering the identical contract preempts tenant search thus limiting tenants outside options and resolves uncertainty early risk aversion reinforces this mechanism and yields differential stickiness by landlord type renegotiation risk for large landlords disappears because the different outcomes rent increase rent decrease and vacancy average out landlords who manage only one unit loathe vacancy and are highly motivated to avoid renegotiation

adjustment costs inventories and output this paper analyzes the optimal adjustment strategy of an inventory holding firm facing price and quantity adjustment costs in an inflationary environment the model nests both the original menu cost model that allows production to be costlessly adjusted and the later model that includes price and quantity adjustment costs but rules out inventory holdings it is shown that the firm s optimal adjustment strategy may involve stockouts at low inflation rates output is inversely related to the inflation rate and the length of time demand is satisfied increases with the demand elasticity but decreases with the storage cost and the real interest rate

steady state equilibrium with state dependent pricing abstract state dependent pricing models are now an operational framework for quantitative business cycle analysis the analysis in ball and romer 1991 sticky prices as coordination failure american economic review 81 3 539 552 however suggests that such models may be rife with multiple equilibria for in their static model price adjustment is always characterized by complementarity a necessary condition for multiplicity we study existence and uniqueness of steady state equilibrium in a discrete time state dependent pricing model we find only weak complementarity and no evidence of multiplicity however nonexistence of symmetric steady state equilibrium with pure strategies arises in the region of the parameter space between flexible and sticky prices

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

analytical approximations in models of hysteresis decisions made under ongoing uncertainty and costly reversibility entail a range of the state variable where inaction is optimal which in turn produces hysteresis permanent effects of temporary shifts the range is usually defined by non linear equations that need numerical solutions in this paper a technique of analytical approximations is developed and applied to two models menu costs and investment the resulting explicit solutions help clarify why hysteresis is important even for small irreversibility in the menu cost model hysteresis is two orders of magnitude larger than under the akerlof yellen or mankiw assumptions when decisions that are costly to reverse are made under conditions of ongoing uncertainty the optimum policy usually entails a range of inertia the action should be taken only when the value of the underlying state variable becomes especially favourable and reversed only when it becomes especially unfavourable there is an intermediate range over which inaction is optimal this in turn gives rise to hysteresis starting from a value in the range of inertia if the state variable crosses the action trigger point and then returns to its original level the action will be taken but not reversed thus a temporary change will leave a permanent effect numerical solutions for models of irreversible investment show that the range of inaction is remarkably large even when the cost of reversal is small see brennan and schwartz 1985 constantinides 1986 and dixit 1989a b for examples of this unfortunately the equations tlhat determine the optimum policy are highly non linear they do not have analytical solutions therefore we lack a clearer and more general understanding of why hysteresis is numerically so important in this paper i derive analytical approximations for the solutions of more general problems of this kind when the costs of change are small the idea that small costs of change induce large amounts of inertia has been popularized in the model of akerlof and yellen 1985 mankiw 1985 and others in these models second order small costs of making price changes yield price stickiness in response to first order changes in the money supply this is a simple application of the envelope theorem but these models are static and their application to a dynamic reality must assume either permanent shocks or static expectations when there is ongoing uncertainty which is rationally expected by the decision maker the option value of the status quo enlarges the zone where inaction is optimal adding these features to the mankiw akerlof yellen may model i show that fourth order small costs of change generate first order inertia

do the new keynesian microfoundations rationalise stabilisation policy systematic monetary policy is analysed in a two period extension of standard static new keynesian models it is shown that countercyclical policies increase the band of inaction of the price setters and that this feedback effect on price rigidity may make such policies self justifying that is the policies themselves cause the fluctuations that they are stabilising moreover countercyclical policies may in general reduce welfare in fact socially optimal policies may very well involve a commitment to enhance shocks

heterogeneity and output fluctuations in a dynamic menu cost economy when firms face menu costs the relation between their output and money is highly non linear at the aggregate level however this needs not be so in this paper we study the dynamic behaviour of a menu cost economy where firms are heterogeneous in the shocks they perceive and the demands and adjustment costs they face in this context we i generalize the caplin and spulber 1987 steady state monetary neutrality result ii show that uniqueness of equilibria depends not only on the degree of strategic complementarities but also on the degree of dispersion of firms positions in their price cycle iii characterize the path of output outside the steady state and show that as strategic complementarities become more important expansions become longer and smoother than contractions and iv show that the potential impact of monetary shocks is an increasing function of the distance of the economy from its steady state but that an uninformed policy maker will have no effect on output on average

menu costs and nominal price friction an experimental examination abstract this paper examines how menu costs affect monopoly behavior using experimental markets this research takes a new keynesian theory of business fluctuations and tests it in a controlled environment where people are making decisions for real salient payoffs these experiments are the first controlled test of a new keynesian explanation for sticky product prices and they offer some insights into nominal price frictions the results from this research indicate that menu costs have real economic effects in a static situation but not in a dynamic setting

price setting with quadratic adjustment costs experimental evidence abstract we test the price setting behavior of firms using the rotemberg 1982 model in order to explain puzzles in the new keynesian phillips curve nkpc for our tests we conducted experiments that adapt the model into an individual decision making problem we find systematic deviations in price setting according to the subjects degree of information acquisition subjects rarely make use of past information on the other hand subjects that decide to acquire relatively little information about future desired prices tend to overweight their own past set price when they set prices we study the impact of this heterogeneous price setting behavior for theoretically derived forward looking phillips curves our estimated nkpcs are in line with the empirical literature the deviations from theoretical predictions in our nkpcs are driven by the less informed subjects

inflation and output dynamics with state dependent pricing decisions this paper studies a state dependent pricing model in which firms face a fixed cost of changing their pricing plans a pricing plan specifies an entire sequence of time varying future prices allowing firms to choose a pricing plan rather than a single price generates inflation inertia in the response of the economy to small changes in the growth rate of money allowing firms to choose when to change their pricing plan generates a non linear response of inflation and output to small and large changes in the money growth rate the non linear solution method also reveals that the model generates an asymmetric response of output and inflation to monetary expansions and contractions

menu costs and the neutrality of money a model of endogenous price adjustment under money growth is presented firms follow s s pricing policies and price revisions are imperfectly synchronized in the aggregate price stickiness disappears and money is neutral the connection between firm price adjustment and relative price variability in the presence of monetary growth is also investigated the results contrast with those obtained in models with exogenous fixed timing of price adjustment

nonlinear monetary policy in europe fact or myth abstract we hold the fort for linear specification of monetary policy and economic activity in europe using data on the last two and a half decades we cannot reject the hypothesis that monetary policy is a linear process and we find mixed results regarding economic activity

explaining investment dynamics in u s manufacturing a generalized s s approach we are grateful to olivier blanchard whitney newey james stock an editor three anonymousreferees and seminar participants at brown cepr champoussin chicago columbia econometric society meetings caracas and tokyo efcc harvard impa lse nber princeton rochester site toronto u de chile and yale for their comments financial support to caballero from the national science and sloan foundations and to engel from fondecyt grant 195 510 and the mellon foundation grant 9608 is gratefully acknowledged 2since plants entry is excluded from their sample these statistics are likely to represent lowerbounds on the degree of lumpiness in plants investment patterns 3we use the word project to emphasize the fact that the actual implementation of a projectmay cover more than a year observation realistic time to build aspects of investment are not incontradiction with the view that investment episodes are lumpy in nature 4 see chirinko 1994 for a survey of the empirical investment literature

a quantized approach to rational inattention abstract in this paper i propose a model of rational inattention where the choice variable is a deterministic function of the exogenous variables and still only a finite amount of information is being used this holds provided the choice variable is discrete rather than continuous that is the mapping from the realization of the exogenous variables to the endogenous ones is piece wise constant thus limited information is now a source of lumpiness in behavior rather than a source of noise the approach is applied to a simple static model of price setting where individual price setters face aggregate monetary shocks and idiosyncratic productivity shocks the effect of aggregate money shocks on output and prices is studied it is shown that as the variance of idiosyncratic shocks become large the aggregate log price level converges to a linear function of the aggregate money shock with a coefficient which is strictly between 0 and 1 consequently unanticipated aggregate money shocks have real effects on output in contrast to the sticky price model of caplin and spulber 1987 but these effects are smaller than in standard rational inattention models or in the lucas 1972 misperception model

customer evaluation of products in a global market marketing scholars interest in the influence of source countries on product evaluations has intensified during the past twenty five years as this research tradition has evolved the literature has gradually gained more depth and sophistication nevertheless research in this area lacks a common conceptual framework furthermore research priorities with regard to the role of this area of inquiry within the broader field of consumer behavior marketing and general business decisions have not been made clear this article rationalizes the buying decision processes within the context of source country influences and offers a conceptual framework for further development in addition it links country level considerations to firm level decisionmaking thus providing a foundation for meaningful managerial decisions

business cycles in international historical perspective business cycle models seek to answer the question of why economies go through cycles of recession and recovery or boom and bust any theory of the business cycle makes two sorts of claims what shocks are most important in disturbing the economy and what economic structure is necessary for propagating these shocks for example one common explanation of business cycles begins with monetary shocks and then seeks to explain why monetary shocks are not purely neutral as neoclassical theory would have it and instead have real effects at least in the short term early models in this vein were often implicitly or explicitly based on the proposition that markets do not clear continuously early equilibrium real business cycle theories instead emphasized the importance of real shocks especially to technology which may cause socially efficient fluctuations even when markets are always in equilibrium more recent models have attempted to marry the equilibrium approach to macroeconomics with the substantive keynesian ideas that money is not neutral and that economic fluctuations are costly new keynesian theories of the business cycle admit the possibility of a number of economic shocks including monetary and technology shocks but then focus on explaining how nominal price rigidities within the economy can turn these shocks into recessions or booms other models show that business cycles driven by keynesian animal spirits are consistent with rigorous microfoundations and rational expectations seeking empirical evidence for and against these various approaches we turn business cycle theories loose on perhaps the greatest macroeconomic laboratory

explicit versus implicit country stereotypes as predictors of product preferences insights from the stereotype content model drawing on the stereotype content model scm we investigate the impact of both explicit and implicit country stereotypes on consumer preferences in study 1 we show that the competence dimension of the scm measured both explicitly and implicitly drives purchase intention by positively influencing brand affect in study 2 we disentangle further the role of explicit and implicit stereotypes and show that explicit judgments of country competence are better predictors of deliberate consumer choices whereas implicit judgments of country warmth dominate spontaneous choice managerially our findings indicate that sole reliance on explicit stereotypes may result in an incomplete picture of consumers responses to country of origin cues

undominated prices in the three good model abstract any movement away from walrasian prices will make somebody worse off we ask which other prices share this property the paper characterizes the set of such prices called undominated prices for the three good economy output labor and a nonproduced good that is now well known from the work of barro grossman benassy and malinvaud we consider two groups of consumers workers and shareholders we show that under some conditions there exist prices and wages that generate unemployment and are undominated this requires that a workers be poorly endowed with the nonproduced good b there be little substitution in consumption between the produced and the nonproduced good and c the market for the produced good be balanced i e prices equal marginal costs

dynamic s s economies in this paper the authors provide a framework to study the aggregate dynamic behavior of an economy where individual units follow s s policies and are subject to aggregate and idiosyncratic shocks they characterize structural and stochastic heterogeneities that ensure convergence of the economy s aggregate to that of its stochastic frictionless counterpart determine the speed at which convergence takes place and describe the transitional dynamics of this economy they study the evolution of the economy s aggregate and the evolution of the difference between this aggregate and that of the difference between this aggregate and that of an economy without microeconomic friction where the latter pertains to a situation where individual units adjust with no delay to all shocks copyright 1991 by the econometric society

beyond country image favorability how brand positioning via country personality stereotypes enhances brand evaluations across four lab experiments and a field study we find that brands are evaluated more favorably when the brand is positioned in a manner that is congruent with the brand s home country personality stereotype than when brand positioning is incongruent results demonstrate that cultural authenticity mediates this effect we also uncover a moderating effect whereby brands are viewed more favorably when brand positioning and country personality stereotypes are incongruent rather than congruent under conditions of consumer animosity toward the firm s home country this study is the first to demonstrate how international firms can leverage country of origin personality stereotypes as a brand building advantage

nominal shocks in monopolistically competitive markets an experiment abstract a market experiment examines the capacity of price and information frictions to explain real responses to nominal price shocks results indicate that both price and information frictions impede the response to a nominal shock as predicted by the standard dynamic adjustment models observed adjustment delays however far exceed predicted levels results of a pair of subsequent treatments indicate that a combination of announcing the shock privately to all sellers rather than publicly and a failure of many sellers to best respond to their expectations explains the observed adjustment inertia

a tale of two rigidities sticky prices in a sticky information environment macroeconomic models with microeconomic foundations allow for comparisons with macro and micro empirical evidence this paper proposes a model wherein firms i acquire information infrequently generating sticky information mankiw and reis 2002 and ii face menu costs producing state dependent sticky prices i estimate parameters via indirect inference and show that under considerable real rigidity sticky prices in a sticky information environment are consistent with micro and macro evidence sticky prices not only help match micro data on price changes size and durations between adjustments they also improve the model s fit with the macro data as embodied in an empirical phillips curve

tirole s industrial regulation and organization legacy in economics jean tirole was awarded the 2014 sveriges riksbank prize in economic sciences in memory of alfred nobel for his analysis of market power and regulation this paper provides an overview of some of that work and of his related contributions to game theory

decoupling nominal and real rigidities we revisit ball and romer s 1990 canonical model of price setting with menu costs that exhibits multiple equilibria we show that changes to firms markups move nominal and real rigidities in opposite directions using game theoretic tools to derive a unique equilibrium we find that accounting for agents endogenous adjustment of price expectations further weakens the link between real and nominal rigidities

some evolutionary foundations for price level rigidity this paper shows that price rigidity evolves in an economy populated by imperfectly rational agents who experiment with alternative rules of thumb in the model firms must set their prices in face of aggregate demand shocks their payoff depends on the level of aggregate demand as well as on their own price and their neighbor s price the latter assumption captures local interactions despite the fact that the rational expectations equilibrium ree is characterized by a simple pricing rule that firms can easily adopt the economy does not converge to the ree for all parameter values when the volatility of monetary innovations is low and interactions among firms are high the aggregate price level exhibits rigidity in that it does not fully react to contemporaneous aggregate demand shocks we discuss the role of the nature of experimentation and of path dependence driven by interactions in explaining these results

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

price stickiness in ss models new interpretations of old results abstract what is the relation between infrequent price adjustment and the dynamic response of the aggregate price level to monetary shocks the answer to this question ranges from a one to one link calvo g 1983 prices in a utility maximizing framework journal of monetary economics 12 383 398 to no connection whatsoever caplin a spulber d 1987 menu costs and the neutrality of money quarterly journal of economics 102 703 726 the purpose of this paper is to provide a unified framework to understand the mechanisms behind this wide range of results in doing so we propose new interpretations of key results in this area which in turn suggest the kind of ss model that is likely to generate substantial price rigidity among these new interpretations we revisit caplin and spulber s monetary neutrality result we show that when price stickiness is measured in terms of the impulse response function this result is not a consequence of aggregation as is often assumed but is due instead to the absence of price stickiness at the microeconomic level we also show that the selection effect according to which units that adjust their prices are those that benefit the most is neither necessary nor sufficient to account for the higher aggregate flexibility of ss type models compared to calvo models instead the key concept is the contribution of the extensive margin of adjustment to the aggregate price response the aggregate price level is more flexible than suggested by the microeconomic frequency of adjustment if and only if this term is positive

investment dynamics with information costs investment in physical capital at the micro level is infrequent and large or lumpy the most common explanation for this is that firms face non convex physical adjustment costs the model developed in this paper shows that information costs make investment lumpy at the micro level even in the absence of non convex adjustment costs when collecting and processing information is costly the firm optimally chooses to do it sporadically and to be inactive most of the time this behavior results in infrequent and possibly large capital adjustments the model fits plant level investment rate moments well and it also matches some higher order moments of aggregate investment rates keywords investment dynamics information costs inattentiveness lumpy investment jel classification d21 d83 d92 e22

state dependent or time dependent pricing does it matter for recent u s inflation in the 1988 2004 micro data collected by the u s bureau of labor statistics for the cpi price changes are frequent every 4 7 months depending on the treatment of sale prices and large in absolute value on the order of 10 the size and timing of price changes varies considerably for a given item but the size and probability of a price change are unrelated to the time since the last price change movements in aggregate inflation reflect movements in the size of price changes rather than the fraction of items changing price due to offsetting movements in the fraction of price increases and decreases neither leading time dependent models taylor or calvo nor 1 st generation state dependent models match all of these facts some 2 nd generation state dependent models however appear broadly consistent with the empirical patterns

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 new keynesian synthesis the new keynesians made more rapid progress in understanding the microeconomics of unemployment than in understanding the microeconomics of nominal price rigidity but the past five years have seen important breakthroughs in this second area this paper will describe these breakthroughs discuss our current understanding of nominal rigidity and assess the work that remains to be done

celebrity endorsements in emerging markets align endorsers with brands or with consumers this paper investigates country of origin co effects as they relate to celebrity endorsements across multiple studies in emerging markets the authors show that consumers evaluations depend on the match between 1 celebrity co and consumer co termed consumer co fit and 2 celebrity co and brand co termed brand co fit if there is a trade off between consumer co fit and brand co fit the authors identify contingencies e g ethnocentrism levels that determine which type of co fit leads to higher evaluations furthermore the authors develop prescriptions for segmentation in emerging markets and specify when these prescriptions differ from those prescribed by prior international business research

is firm pricing state or time dependent evidence from u s manufacturing abstract if pricing is state dependent firms are more likely to adjust whenever aggregate and idiosyncratic shocks reinforce each other and trigger desired price changes in the same direction using measures of technology shocks derived from production function estimates for four digit u s manufacturing industries i find that sectoral inflation rates are more sensitive to negative as opposed to positive technology disturbances in periods of higher economy wide inflation commodity price increases and expansionary monetary policy shocks i argue using a state dependent sticky price model that matches salient features of the u s microprice data that these results suggest that pricing is state dependent in u s manufacturing

on the efficiency of fixed price equilibrium abstract we study the efficiency properties of k equilibrium a species of fixed price equilibrium in particular we examine the interrelations among k equilibria and two of its properties order and voluntariness we also consider several alternative concepts of optimality

monetary non neutrality in a multisector menu cost model empirical evidence suggests that as much as one third of the u s business cycle is due to nominal shocks we calibrate a multisector menu cost model using new evidence on the cross sectional distribution of the frequency and size of price changes in the u s economy we augment the model to incorporate intermediate inputs we show that the introduction of heterogeneity in the frequency of price change triples the degree of monetary non neutrality generated by the model we furthermore show that the introduction of intermediate inputs raises the degree of monetary non neutrality by another factor of three without adversely affecting the model s ability to match the large average size of price changes a single sector model with a frequency of price change equal to the median rather than the mean generates monetary non neutrality similar to that in our multisector model our multisector model with intermediate inputs generates variation in real output in response to calibrated aggregate nominal shocks that can account for roughly 23 of the u s business cycle

optimum pricing policy under stochastic inflation we describe aggregate inflation as a stochastic process in which the rate of change of the price level can be positive or zero where the times spent in each state are of random duration this class of processes includes two state markov chains and renewal processes as special cases it is shown that the optimal pricing policy of a monopolistic firm with non convex costs of price adjustment is s s in its real price i e its nominal price relative to the price level a basic certainty equivalence result is proved i e the firm behaves as if it faces a certain and fixed rate of inflation higher than the actual expected rate the difference between the two rates being a risk premium which depends on the real interest rate and the parameters of the stochastic process one can thus apply previous results from the case of certainty sheshinski and weiss review of economic studies 1977 to obtain comparative static results in particular one finds that an increase in the variance of expected inflation leads firms to choose a pricing policy with larger amplitude in real price the paper also addresses the question of consistency in firms expectations when the price level is determined by the firms actions in this paper we consider pricing policies of individual firms in an inflationary environment each firm expects the general price level to increase and must determine the rate of increase of its own price it is assumed that the firm incurs an adjustment cost when it changes its nominal price consequently firms choose to change prices occasionally rather than continuously

small menu costs and large business cycles a macroeconomic model of monopoly i introduction the conflict between modern neoclassical and traditional keynesian theories of the business cycle centers upon the pricing mechanism in neoclassical models prices are fully flexible they represent the continuous optimization of economic agents and the continuous intersection of supply and demand in keynesian models prices are often assumed to be sticky they do not necessarily equilibrate all markets at all times one of the reasons for the resurgence of the equilibrium approach to macroeconomics has been the absence of a theoretical underpinning for this keynesian price stickiness this note shows that sticky prices can be both privately efficient and socially inefficient the business cycle results from the suboptimal adjustment of prices in response to a demand shock to the extent that policy can stabilize aggregate demand it can mitigate the social loss due to this suboptimal adjustment in some keynesian models prices are simply exogenously fixed 2 in others agents must set their prices in advance of the transaction date the act of altering a posted price is certainly costly these costs include such items as printing new catalogs and informing salesmen of the new price yet these menu costs are small and therefore generally perceived as providing only a weak foundation for these fixed price models however this inference is flawed small menu costs can cause large welfare losses the claim that price adjustment costs are small does not rebut the claim that they are central to understanding economic fluctuations

walking the walk or talking the talk corporate social responsibility decoupling in emerging market multinationals research shows that emerging market multinational enterprises em mnes increasingly use corporate social responsibility csr reporting as a global legitimation strategy less is known about when their csr reporting is decoupled from their csr performance drawing on neo institutional theory we argue that em mnes csr decoupling is shaped by their dual embeddedness in their home countries and the global institutional environment we then examine how em mnes home country institutional voids and degree of internationalization affect their tendency to engage in such decoupling our model receives partial support in a study of 93 mnes from 15 emerging markets between 2005 and 2012

aggregation and stabilization policy in a multi contract economy abstract this paper presents a model of a multi sector economy in which each sector is characterized by a different type of wage or price stickness the various sectors experience the same exogenous shocks and have the same money supply the analysis shows that demand shocks pose no serious problems for stabilization policy in contrast supply shocks may force the policymaker to choose between stability in one sector and stability in another the analysis also shows that the economist as to the economy s underlying structure and obscures the tradeoffs the policymaker must confront in particular a feedback rule chosen on the basis of an aggregate model could be either better or worse than a passive policy

time or state dependent price setting rules evidence from micro data we use two rich micro datasets on portuguese firms to analyse the ability of time and state dependent price setting rules to explain durations of price spells or the probability of price changes using a duration model with time varying regressors we find some evidence of state dependent price setting behaviour which suggests that time dependent models are unable to fully describe the features of the data specifically we find statistically significant impacts on the probability of a price change of inflation the level of economic activity and the magnitude of the last price change besides being statistically significant in some cases these effects are also economically important finally it is found that negative and positive values of the covariates have different impacts on the expected duration of prices

infrequent housing adjustment limited participation and monetary policy this paper asks why monetary contractions have strong effects on the housing market the paper presents a model with staggered housing adjustment in which monetary policy has real effects in the absence of any rigidity in producer pricing or wages limited participation in financial markets leads to a rise in the real mortgage rate following an increase in the nominal short rate since households must take on a mortgage to consume housing the rise in the real interest rate reduces the share of residential investment in output

optimal price dynamics and speculation with a storable good this paper analyzes as a dynamic game the optimal price and storage strategies of respectively a the seller of a storable good who must keep pace with inflation but incurs a cost to changing his price b his customers who speculate on the timing of price adjustments to buy and store just before a unique markov perfect equilibrium is shown to exist and is fully characterized rt generally involves a phase of mixed strategies during which the seller tries to deter speculation by injecting uncertainty into its price dynamics while speculators store in increasing numbers with possibly a final run on the good the stochastic price policies of a large number of such firms are shown to aggregate back to a price index growing at the rate of general inflation in response to which they arose the model thus establishes that a a constant rate of aggregate inflation can at the same time generate and cover up significant uncertainty and social costs at the microeconomic level b speculation can be destabilizing and socially wasteful even in the absence of shocks and imperfect information most importantly they provide a theoretical foundation for the frequently encountered claim that inflation causes price uncertainty