optimal monetary policy in an economy with inflation persistence abstract this paper studies optimal monetary policy in a model where inflation is persistent two types of price setters are assumed to exist one acts rationally given calvo type constraints on price setting the other type sets prices according to a rule of thumb this results in a phillips curve with both a forward looking term and a backward looking term the phillips curve nests a standard purely forward looking phillips curve as well as a standard purely backward looking phillips curve as special cases a cost push supply shock is derived from microfoundations by adding a time varying income tax and by making the elasticity of substitution between goods stochastic a central bank loss function for this model is derived from a second order taylor approximation of the household s welfare function optimal monetary policy for different relative values of the forward and backward looking terms is then analyzed for both the commitment case and the case of discretion

toward a reconstruction of keynesian economics expectations and constrained equilibria a two period model of temporary equilibrium with rationing is presented paying particular attention to agents expectations of future constraints it is shown that with arbitrary constraint expectations many different types of current equilibrium may be consistent with the same set of current and expected future wages and prices and that constraint expectations exhibit bootstraps properties e g a higher expectation of keynesian unemployment tomorrow increases the probability that it will prevail today in addition the concept of rational constraint expectations i e perfect foresight of future constraints is introduced and shown to enhance rather than reduce the effectiveness of government policy

inflation persistence alternative interpretations and policy implications in this paper i consider the policy implications of two alternative structural interpretations of observed inflation persistence which correspond to two alternative specifications of the new keynesian phillips curve nkpc the first specification allows for some degree of intrinsic persistence by way of a lagged inflation term in the nkpc the second is a purely forward looking model in which expectations farther into the future matter and coefficients are time varying in this specification most of the observed inflation persistence is attributed to fluctuations in the underlying inflation trend which are a consequence of monetary policy rather than a structural feature of the economy with a simple quantitative exercise i illustrate the consequences of implementing monetary policy assuming a degree of intrinsic persistence that differs from the true one the results suggest that the costs of implementing a stabilization policy when the policymaker overestimates the degree of intrinsic persistence are potentially higher than the costs of ignoring actual structural persistence the result is more clear cut when the policymaker minimizes a welfare based loss function

maintaining low inflation money interest rates and policy stance abstract this paper presents a systematic empirical relationship between money and subsequent prices and output using us euro area and swiss data since the 1960 1970s monetary developments unlike interest rate stance measures are shown to provide qualitative and quantitative information on subsequent inflation the usefulness of monetary analysis is contrasted to weaknesses in modeling monetary policy and inflation with respectively short term interest rates and real activity measures the analysis sheds light on the recent change in inflation volatility and persistence as well as on the phillips curve flattening and reveals drawbacks in pursuing a low inflation target without considering monetary aggregates

why has u s inflation become harder to forecast we examine whether the u s rate of price inflation has become harder to forecast and to the extent that it has what changes in the inflation process have made it so the main finding is that the univariate inflation process is well described by an unobserved component trend cycle model with stochastic volatility or equivalently an integrated moving average process with time varying parameters this model explains a variety of recent univariate inflation forecasting puzzles and begins to explain some multivariate inflation forecasting puzzles as well

inflation and welfare in a monetary economy it is in everyone s private interest to try to get someone else to hold non interest bearing cash and reserves but someone has to hold it all so these efforts must simply cancel out all of us spend several hours per year in this effort and employ thousands of talented and highly trained people to help us these person hours are simply thrown away wasted on a task that should not have to be performed at all

the asymmetry of the new keynesian phillips curve in the euro area abstract using a two stage quantile regression framework we uncover significant asymmetries across quantiles for all coefficients in an otherwise standard new keynesian phillips curve nkpc for the euro area a pure nkpc specification accurately captures inflation dynamics at high inflation quantiles

lending booms latin america and the world recent theories of crisis put lending booms at the root of financial collapses yet lending booms may be a natural consequence of economic development and fluctuations so are lending booms dangerous in this paper we investigate empirically this question using a broad sample of lending boom episodes over 40 years with a special eye for latin america our results indicate that 1 lending booms are often associated with i a domestic investment boom ii an increase in domestic interest rates iii a worsening of the current account iv a declines in reserves v a real appreciation vi a decline in output growth 2 typical lending booms do not increase substantially the vulnerability of the banking sector or the balance of payments comparing latin america and the rest of the world we find that latin america lending booms make the economy considerably more volatile and vulnerable to financial and balance of payment crisis

an examination of the effects of government purchases in an open economy this paper examines the effects of permanent and transitory changes in government purchases in the context of a model of a small open economy that produces and consumes both traded and nontraded goods the model incorporates an equilibrium interpretation of the business cycle that emphasizes the responsiveness of agents to intertemporal relative price changes it is demonstrated that transitory increases in government purchases lead to an appreciation of the real exchange rate and an ambiguous change although a likely worsening in the current account while permanent increases have an ambiguous impact on the real exchange rate and no effect on the current account when agents do not know whether a given increase in government purchases is permanent or transitory the effect is a weighted average of these separate effects the weights depend on the relative variances of the transitory and permanent components of government purchases in the past few years a considerable amount of effort has been devoted to examining the effects of macroeconomic policy in an open economy such issues as exchange rate overshooting deviations from purchasing power parity sterilization and monetary control the effectiveness of monetary policy and the choice between alternative exchange rate regimes have been at center stage the models that have been employed to study these issues have run the spectrum from variants of the mundell fleming model such as dornbusch 1976 turnovsky 1981 and kimbrough 1983a to wage contracting and indexing models like bhandari 1982b and flood and marion 1982 to equilibrium models of the business cycle along the lines of bhandari 1982a saidi 1982 and kimbrough 1983b to the closely related intertemporal utility maximization models with money of helpman 1981 and stockman 1980 1983 one common thread that in a sense unifies all of these and other recent contributions is that they are concerned primarily with the effects of alternative monetary and exchange rate policies that the central bank might enact in light of the development and refinement during this period of the monetary approach to the balance of payments and the exchange rate it is not surprising i would like to thank phil brock jeremy greenwood gary zarkin and two anonymous

government deficits private investment and the current account an intertemporal disequilibrium analysis this paper uses a model with full intertemporal optimization and fischer gray type short run real wage rigidities to demonstrate effects of deficit spending in different employment regimes this study attempts to bring the two strands of short run aggregate demand effects and certain intertemporal aspects together it analyses fiscal policy in the context of a model with full intertemporal optimization underlying private behavior which allows the paper to deal with the intertemporal aspects but it also explicitly incorporates the possibility of short run labour and goods market disequilibrium caused by fischer 1977 gray 1978 type contract based real wage rigidities and within period downward price inflexibility prices are however assumed to be flexible upward in a departure of the standard disequilibrium literature in section 2 the basic model is presented the paper uses a two period full optimization set up where wages and prices are set at the beginning of each period using all available information fiscal policy effects under keynesian unemployment are analyzed in section 3 while section 4 looks at the case of classical unemployment section 5 concludes

budget deficits and the current account an intertemporal disequilibrium approach the objective of the present paper is to develop an intertemporal disequilibrium model of a monetary economy to explain the effects of fiscal policy on the current account we wish to emphasize the role of aggregate demand determined output fluctuations and flexible exchange rates within a microtheoretic optimizing framework furthermore the differing effects of monetary versus non monetary i e tax or bond finance of government expenditures are considered

sectoral and aggregate inflation dynamics in the euro area this paper synthesises the implications of recent statistical evidence regarding inflation persistence in the euro area for aggregate data the degree of inflation persistence appears to be very high for sample periods spanning multiple decades but falls dramatically once we allow for time variation in the mean level of inflation furthermore the timing of these breaks in mean generally coincides with observed shifts in the monetary policy regime finally sectoral inflation series exhibit much less persistence than aggregate inflation mainly because of the influence of transitory sector specific shocks jel e31 c22 c43

inflation targeting and relative price variability what difference does inflation targeting make author affiliation chi young choi cychoi uta eduyoung se kim acknowledgment the authors are grateful to coeditor kent kimbrough and two anonymous referees for constructive comments that helped to improve this article the authors also wish to thank steve cecchetti kang liu shin ichi nishiyama margie tieslau taka tsuruga and the seminar participants at the academia sinica national chung cheng university national sun yat sen university national taiwan university texas tech university and the university of texas at arlington for helpful comments and vikas kakkar for providing cpi data for hong kong any remaining errors are the authors 1 introductionvariability in relative prices is known to be a major channel through which inflation can induce welfare costs by impeding an efficient allocation of resources in the economy consequently substantial effort has been devoted in the literature to examining the link between relative price variability rpv and aggregate inflation although much of the existing theoretical and empirical literature points to a positive monotonic relationship newer contributions suggest that the relationship between inflation and rpv is more complicated particularly in terms of its sensitivity to the inflation regime 1the primary purpose of this study is to investigate whether the connection between inflation and rpv is influenced in an important way by the monetary policy framework chosen by a central bank specifically this article focuses on exploring whether the adoption of an inflation targeting it framework exerts any significant impact on rpv as measured by the standard deviations of sectoral inflation rates relative to the aggregate rate since it was first implemented in new zealand more than two decades ago the popularity of it has spread with some twenty five countries worldwide implementing the framework to date freedman and laxton 2009 the literature is now replete with studies pointing to reductions in both the level and the volatility of inflation in countries that have adopted it e g mishkin and schmidt hebbel 2007 2 while studies of the impact of it on aggregate inflation performance are plentiful little attention has been paid to the impact of it on rpv the question of whether and indeed how it affects rpv is an important one for several reasons first exploring the potential connection between it and rpv is a worthwhile exercise given the popularity of it as a monetary framework and the centrality of rpv to the current generation of macromodels the importance of rpv is recognized in standard new keynesian dynamic stochastic general equilibrium dsge models where the variance of relative prices is viewed as a useful summary statistic as noted by amano ambler and rebei 2007 for example in dsge models the optimal rate of target inflation and the optimal variability of inflation relative to output depend on the quantitative effects of price dispersion on macroeconomic equilibrium second answering the question helps us identify the driving force behind the change in rpv distinguishing between it adoption itself and its subsequent impact on inflation if the relationship is monotonically positive as is often believed in the literature one should expect that it adoption would bring about a decline in rpv in the same way as it has led to a decline in inflation if the relationship is more complex however the effect of it adoption on reducing rpv may hinge on the change in inflation regimes after it adoption third our answer to the question also sheds additional light on the empirical evidence for the relative effectiveness of it across different stages of development while there is strong evidence that developing countries benefit more from it than industrial countries in combating inflation and its volatility e g petursson 2004 lin and ye 2009 we are aware of no empirical research that has assessed this issue with respect to rpv

investigating inflation persistence across monetary regimes under inflation targeting estimates of the indexation parameter in hybrid new keynesian phillips curves are either equal to zero or very low in the united kingdom canada sweden and new zealand analogous results hold for the euro area under the european monetary union and for switzerland under the new monetary regime under stable regimes with clearly defined nominal anchors inflation appears to be purely forward looking these results question the notion that the intrinsic inflation persistence found in post wwii u s data is structural in the sense of lucas carnegie rochester conference series on public policy 1 1976 19 46 and suggest that hardwiring inflation persistence in macroeconomic models is potentially misleading

behavior of output during currency crises abstract this paper documents the behavior of output and its association with other macroeconomic variables in 195 episodes of currency crises in developing countries during 1970 2000 we find that about 60 of the crises are contractionary while the rest are expansionary crises are one and a half times more likely to be contractionary in emerging markets than in other developing economies the number of contractionary crises or their severity does not increase in the 1990s economies which experience capital inflows in the years prior to the crisis or an increase in external debt burden during the crisis are more likely to slow down during crises while those with restrictions on capital flows prior to the crisis or are more open to international trade are less likely to do so the results are robust to different ways of measuring changes in output during crises

robust monetary policy with competing reference models abstract the existing literature on robust monetary policy rules has largely focused on the case in which the policymaker has a single reference model while the true economy lies within a specified neighborhood of the reference model in this paper we show that such rules may perform very poorly in the more general case in which non nested models represent competing perspectives about controversial issues such as expectations formation and inflation persistence using bayesian and minimax strategies we then consider whether any simple rule can provide robust performance across such divergent representations of the economy we find that a robust outcome is attainable only in cases where the objective function places substantial weight on stabilizing both output and inflation in contrast we are unable to find a robust policy rule when the sole policy objective is to stabilize inflation we analyze these results using a new diagnostic approach namely by quantifying the fault tolerance of each model economy with respect to deviations from optimal policy

do expected future marginal costs drive inflation dynamics abstract this article discusses a more general interpretation of the two step minimum distance estimation procedure proposed in sbordone 2002 the estimator is again applied to a version of the new keynesian phillips curve where inflation dynamics are driven by the expected evolution of marginal costs the article clarifies econometric issues addresses concerns about uncertainty and model misspecification raised in recent studies and assesses the robustness of previous results while confirming the importance of forward looking terms in accounting for inflation dynamics it suggests how the methodology can be applied to extend the analysis of inflation to a multivariate setting

inflation stabilization and welfare the case of a distorted steady state this paper considers the appropriate stabilization objectives for monetary policy in a microfounded model with staggered price setting rotemberg and woodford 1997 and woodford 2002 have shown that under certain conditions a local approximation to the expected utility of the representative household in a model of this kind is related inversely to the expected discounted value of a conventional quadratic loss function in which each period s loss is a weighted average of squared deviations of inflation and an output gap measure from their optimal values zero however those derivations rely on an assumption of the existence of an output or employment subsidy that offsets the distortion due to the market power of monopolistically competitive price setters so that the steady state under a zero inflation policy involves an efficient level of output here we show how to dispense with this unappealing assumption so that a valid linear quadratic approximation to the optimal policy problem is possible even when the steady state is distorted to an arbitrary extent allowing for tax distortions as well as market power and when as a consequence it is necessary to take account of the effects of stabilization policy on the average level of output we again obtain a welfare theoretic loss function that involves both inflation and an appropriately defined output gap though the degree of distortion of the steady state affects both the weights on the two stabilization objectives and the definition of the welfare relevant output gap in the light of these results we reconsider the conditions under which complete price stability is optimal and find that they are more restrictive in the case of a distorted steady state we also consider the conditions under which pure randomization of monetary policy can be welfare improving and find that this is possible in the case of a sufficiently distorted steady state though the parameter values required are probably not empirically realistic

estimating the frequency of price re optimization in calvo style models abstract this paper assesses the empirical performance calvo style models of price re optimization we first show that versions of these models in which firms update non re optimized prices to lagged inflation account well for the statistical behavior of post war u s inflation rates we then investigate whether these models imply plausible degrees of inertia in price setting behavior by firms they do but only if we depart from two standard auxiliary assumptions monopolistically competitive firms face a constant elasticity of demand and capital is homogeneous and can be instantaneously reallocated after a shock we develop a version of the model in which these assumptions are relaxed and show that it is consistent with the view that firms re optimize prices on average once every two quarters

optimal continuation versus the timeless perspective in monetary policy the timeless perspective approach suggests that policymakers implement in each period policy actions conforming to a rule that would have been fully optimal to adopt in the distant past a motivating advantage is that policy henceforth would continue by recommending the same optimality conditions if reconsidered thereby enhancing credibility we argue that continuation can alternatively be achieved with better results on average in terms of policymakers objectives by implementing in each period the time invariant policy that is optimal from the viewpoint of the contemporary understanding of objectives and constraints but while ignoring the conditions that happen to prevail at the time

the persistence of inflation in the united states abstract has the persistence of inflation in the united states changed since 1965 we estimate the persistence of inflation over time using different measures and estimation procedures and we produce confidence intervals for our estimates as well as formal tests of unchanged persistence we find that inflation persistence has been high and approximately unchanged in the u s over our sample period we reconcile our results with other studies that reached different conclusions

changes in the federal reserve s inflation target causes and consequences this paper estimates a new keynesian model to draw inferences about the behavior of the federal reserve s unobserved inflation target the results indicate that the target rose from 1 1 4 percent in 1959 to over 8 percent in the mid to late 1970s before falling back below 2 1 2 percent in 2004 the results also provide some support for the hypothesis that over the entire postwar period federal reserve policy has systematically translated short run price pressures set off by supply side shocks into more persistent movements in inflation itself although considerable uncertainty remains about the true source of shifts in the inflation target jel e31 e32 e52

trend inflation sticky prices and expectational stability abstract micro evidence indicates that each period a fraction of prices is kept unchanged under a positive trend inflation rate in a sticky price model based on this evidence recent research shows that high trend inflation is a serious cause for indeterminacy of rational expectations equilibrium under the taylor rule this paper examines implications of trend inflation for expectational stability of the equilibrium an empirically plausible calibration of the model demonstrates that a fundamental rational expectations equilibrium is likely to be expectationally stable even in cases of indeterminacy induced by high trend inflation

new evidence on inflation persistence and price stickiness in the euro area implications for macro modeling this paper evaluates new evidence on price setting practices and inflation persistence in the euro area with respect to its implications for macro modeling it argues that several of the most commonly used assumptions in micro founded macro models are seriously challenged by the new findings jel e31 e52

autoregression based estimation of the new keynesian phillips curve abstract we propose an estimation method of the new keynesian phillips curve nkpc based on a univariate noncausal autoregressive model for the inflation rate by construction our approach avoids a number of problems related to the gmm estimation of the nkpc we estimate the hybrid nkpc with quarterly u s data 1955 1 2010 3 and both expected future inflation and lagged inflation are found important in determining the inflation rate with the former clearly dominating moreover inflation persistence turns out to be intrinsic rather than inherited from a persistent driving process

reconsideration of the p bar model of gradual price adjustment abstract this paper compares the p bar model of price adjustment with the currently dominant calvo specification theoretically the p bar model is more attractive as it depends on adjustment costs for physical quantities rather than nominal prices while incorporating a one period information lag furthermore the resulting adjustment relation is more completely free of money illusion in terms of dynamic relationships and therefore satisfies the natural rate hypothesis of lucas 1972a econometric testing of the natural rate hypothesis in eckstein o ed the econometrics of price determination board of governors of the federal reserve system which is not satisfied by the calvo model in any of its variants along the way it shows that both the p bar and calvo models can be formulated in distinct versions in which current real wages are or are not allocative quantitatively for a given calibration of the demand parameters the implied time series properties of the inflation rate output gap and nominal interest rate are determined for various policy parameters and are compared with quarterly data for the us economy neither model dominates but overall the comparison seems somewhat more favorable to the p bar model and certainly does not provide support for the dominant position held by the calvo model in current monetary policy analysis

inventories in the open economy macro model a disequilibrium analysis this study examines a disequilibrium model of a small open economy with explicit links between periods due to inventory accumulation as well as the more conventional channels through current account imbalances and the government budget constraint the key features of the model are that agents have perfect foresight with neutral public debt and that inventories adjust to smooth production intertemporarily the paper explores the extent to which fiscal policy can be used selectively for coping with an export slump without running into a balance of payments constraint

financial crises lessons from history for today making use of the propensity score matching method we match earlier crises pre 2007 with currently ongoing crises post 2007 the old and new crises are matched in three dimensions the global setting in which they occurred the structure of the economy and the domestic vulnerabilities in the pre crisis period our findings suggest that the euro periphery crises share sufficient commonalities with earlier crises in their pre crisis domestic vulnerabilities the study points to two important conclusions first the euro periphery crises are composed of unique country experiences hence it will not be easily resolved with a one size fits all set of economic policies secondly while each banking crisis has its inherent uniqueness each crisis also shares sufficient commonalities with one or more of the asian 5 1996 97 crises the nordic banking crisis of the early 1990s or the japanese banking crisis of the 1990s thus the extensive knowledge accumulated through these former banking crises can help in designing recovery policies selin sayek and fatma taskin

is there any asymmetry in the effect of inflation on relative price variability abstract it is widely perceived that relative prices are more dispersed in periods of price decreases than in periods of price increases we show that the asymmetry results from misspecifying the true u shaped underlying model with a piecewise linear regression model

dual exchange rates capital controls and sticky prices abstract it is often argued that capital controls are an appropriate policy response to the exchange rate overshooting which occurs when asset markets adjust more rapidly than goods markets in this paper an intertemporal disequilibrium model of an open economy is developed in which the effect of capital controls is examined the results are contrasted with recent studies by adams and greenwood 1985 and obstfeld 1986 in which capital controls are evaluated within a purely equilibrium framework and thus inevitably take the form of a welfare reducing distortion

sticky price models of the business cycle can the roundabout production solve the persistence puzzle abstract this paper considers the persistence puzzle unveiled by chari et al 2000 our findings show that endogenously persistent output dynamics are not a puzzle for the standard sticky price model once roundabout production is taken into account we make this point using a new keynesian framework emphasizing an inertial mechanism called the multiplier for price stickiness in the spirit of basu 1995

the european sovereign debt crisis the origin and propagation of the european sovereign debt crisis can be attributed to the flawed original design of the euro in particular there was an incomplete understanding of the fragility of a monetary union under crisis conditions especially in the absence of banking union and other european level buffer mechanisms moreover the inherent messiness involved in proposing and implementing incremental multicountry crisis management responses on the fly has been an important destabilizing factor throughout the crisis after diagnosing the situation we consider reforms that might improve the resilience of the euro area to future fiscal shocks

does inflation targeting really make a difference evaluating the treatment effect of inflation targeting in seven industrial countries abstract we evaluate the treatment effect of inflation targeting in seven industrial countries that adopted this policy in the 1990s to address the self selection problem of policy adoption we make use of a variety of propensity score matching methods recently developed in the treatment effect literature our results show that inflation targeting has no significant effects on either inflation or inflation variability in these seven countries further evidence from long term nominal interest rates and income velocity of money also supports the window dressing view of inflation targeting

european inflation dynamics abstract we provide evidence on the fit of the new phillips curve npc for the euro area over the period 1970 1998 and use it as a tool to compare the characteristics of european inflation dynamics with those observed in the u s we also analyze the factors underlying inflation inertia by examining the cyclical behavior of marginal costs as well as that of its two main components namely labor productivity and real wages some of the findings can be summarized as follows a the npc fits euro area data very well possibly better than u s data b the degree of price stickiness implied by the estimates is substantial but in line with survey evidence and u s estimates c inflation dynamics in the euro area appear to have a stronger forward looking component i e less inertia than in the u s d labor market frictions as manifested in the behavior of the wage markup appear to have played a key role in shaping the behavior of marginal costs and consequently inflation in europe

transparency expectations anchoring and inflation target abstract in various speeches former fed chairman ben bernanke contrasted the proposal of setting a higher inflation target by claiming that it could unanchor inflation expectations a standard new keynesian framework with learning supports this claim both asymptotically because a higher inflation target shrinks the e stability region when a central bank follows a taylor rule and in the transition phase because a higher inflation target slows down the speed of convergence of expectations transparency helps anchoring expectations however the importance of being transparent diminishes with the level of the inflation target finally the higher the inflation target the more policy should respond to inflation and the less to output to guarantee e stability hence a policy that increases both the inflation target and the monetary policy response to output would be reckless

comparing shocks and frictions in us and euro area business cycles a bayesian dsge approach this paper estimates a dsge model with many types of shocks and frictions for both the us and the euro area economy over a common sample period 1974 2002 the structural estimation methodology allows us to investigate whether differences in business cycle behaviour are due to differences in the type of shocks that affect the two economies differences in the propagation mechanism of those shocks or differences in the way the central bank responds to those economic developments our main conclusion is that each of these characteristics is remarkably similar across both currency areas copyright 2005 john wiley sons ltd

oil price shocks unemployement investment and the current account an intertemporal disequilibrium analysis recent work on macroeconomics of price increases of intermediate imports while theoretical rigorous and elegant is still unable to explain the stylized facts this paper attempts to remedy the shortcomings of earlier papers by using a two period model to properly analyse investment and savings behaviour and hence the current account this model also incorporates disequilibrium in first period labour and goods markets to compare the response of countries in different disequilibrium regimes to shocks in intermediate input prices

the macroeconomics of trend inflation most macroeconomic models for monetary policy analysis are approximated around a zero inflation steady state but most central banks target an inflation rate of about 2 percent many economists have recently proposed even higher inflation targets to reduce the incidence of the zero lower bound constraint on monetary policy in this survey we show that the conduct of monetary policy should be analyzed by appropriately accounting for the positive trend inflation targeted by policymakers we first review empirical research on the evolution and dynamics of u s trend inflation and some proposed new measures to assess the volatility and persistence of trend based inflation gaps we then construct a generalized new keynesian model that accounts for a positive trend inflation in this model an increase in trend inflation is associated with a more volatile and unstable economy and tends to destabilize inflation expectations this analysis offers a note of caution regarding recent proposals to address the existing zero lower bound problem by raising the long run inflation target jel e12 e31 e32 e52 e58

optimal monetary policy under low trend inflation abstract in the monetary policy literature it is common to assume that trend inflation is zero despite overwhelming evidence that zero inflation is neither empirically relevant nor a practical objective for central bank policy we therefore extend the standard new keynesian model to allow for positive trend inflation showing that even low trend inflation has strong effects on optimal monetary policy and the dynamics of inflation output and interest rates under discretion the efficient policy deteriorates and there is no guarantee of determinacy even with commitment targeting non zero trend inflation leads to substantial welfare losses our results serve as a warning against indiscriminate use of models assuming zero trend inflation

on the precision of calvo parameter estimates in structural nkpc models abstract we study the extent of empirical information that can be obtained from alternative structural new keynesian inflation equations concerning the average duration of prices in the united states given that such specifications may be hard to identify using four different indexation and real wage rigidity based models in conjunction with identification robust econometric methods we evaluate the precision of calvo parameter estimates while results are sensitive to calibration and instrument selection we find confidence bounds on the average duration of prices that line up with available micro founded studies statistically significant coefficients for the forcing variables and non zero estimates on the coefficient of lagged inflation

the economic crisis of the 1990s in finland finland s depression a tale of bad luck and bad policies in the 1990s finland underwent a deep depression as its gdp dropped about 14 and unemployment rose from 3 to almost 20 this is a story of bad luck and bad policies bad luck took the form of external shocks the collapse of trade with the former soviet union in 1991 but also sharp cycles in the oecd area however bad luck is far from being the whole story in the absence of bad policies finland would have experienced a recession not a depression bad policies included a poorly designed financial regulation and mistaken reactions to the onset of the crisis of particular interest is the role of financial factors in triggering the crisis and aggravating the effects of bad policies not only were consumption and investment spending hurt by the credit crunch but there is evidence that the private sector s indebtedness has increased structural unemployment which explains why the recovery is proceeding with few job creations a number of general lessons emerge they concern the deregulation of financial markets the policy reaction to massive capital inflows and the role of employment policies seppo honkapohja and erkki koskela

inventories and sticky prices more on the microfoundations of macroeconomics the role of inventories in making prices sticky is studied by analyzing a dynamic linear quadratic model of a monopoly firm facing stochastic demand but able to store its finished goods in inventory it is shown that in contrast to the usual presumption firms that exhibit the smallest output responses to demand fluctuations may also exhibit the smallest price fluctuations specifically firms which have very flexible inventory storage facilities or are subjected to very transitory demand shocks will rely on inventories as buffers and will change neither production nor price very much on the other hand firms which have very inflexible storage facilities or whose demand shocks are quite permanent will display large swings in both price and output the standard assumption about inventory carrying costs that has been used in the literature that they are linear is shown to imply that production is impervious to fluctuations in demand it is also established that prices may respond more strongly to positive demand shocks than to negative ones if it is impossible to hold negative inventories i e to have unfilled orders the model offers an explanation for stickiness in relative prices however under certain circumstances it may help explain the persistence of inflation this abstract was borrowed from another version of this item

optimal monetary policy in a new keynesian model with heterogeneous expectations abstract in a world where expectations are heterogeneous what is the design of the optimal policy are canonical policies robust when heterogeneous expectations are considered or would they be associated with large welfare losses we aim to answer these questions in a stylized simple new keynesian model where agents beliefs are not homogeneous assuming that a fraction of agents can form their expectations by some adaptive or extrapolative schemes we focus on an optimal monetary policy by second order approximation of the policy objective from the consumers utility function we find that the introduction of bounded rationality in the new keynesian framework matters the presence of heterogeneous agents adds a new dimension to the central bank s optimization problem consumption inequality optimal policies must be designed to stabilize the cross variability of heterogeneous expectations in fact as long as different individual consumption plans depend on different expectation paths a central bank aiming to reduce consumption inequality should minimize the cross sectional variability of expectations moreover the traditional trade off between the price dispersion and aggregate consumption variability is also quantitatively affected by heterogeneity

optimized taylor rules for disinflation when agents are learning abstract when private agents learn a new policy rule an optimal simple taylor rule for disinflation differs substantially from that under full information the central bank can reduce target inflation without much difficulty but adjusting reaction coefficients on lagged inflation and output is more costly temporarily explosive dynamics emerge when there is substantial disagreement between perceived and actual feedback parameters making the transition highly volatile the bank copes by choosing reaction coefficients close to the private sector s prior mode thereby sacrificing long term performance in exchange for achieving lower transitional volatility