the costs of hiring skilled workers the shape of adjustment costs in factor demand has been a matter of controversy for quiet some time while some researchers assume quadratic adjustment costs i e that it becomes increasingly expensive to recruit workers in a given time period others believe that there are economies of scale in recruitment surprisingly there is hardly any evidence so far on the shape of hiring costs based on microeconomic data in this paper we estimate the functional form of hiring costs in the theoretical framework of a generalized model of monopsony using both parametric and nonparametric estimation techniques we find strong evidence in favor of diseconomies of scale in recruiting skilled workers our results indicate that the labor market is monopsonistic

the 2009 recovery act stimulus at the extensive and intensive labor margins abstract this paper studies the effect of government stimulus spending on a novel aspect of the labor market the differential impact of spending on the total wage bill versus employment we analyze the 2009 recovery act via instrumental variables using a new instrument the spending done by federal agencies that were not instructed to target funds towards harder hit regions we find a moderate positive effect on jobs created saved i e the extensive margin and also a significant increase in wage payments to workers whose job status was safe without recovery act funds i e the intensive margin our point estimates imply that roughly one half of the wage payments resulting from the act were paid at the intensive margin to provide a theoretical underpinning for the estimates we build a micro founded dynamic model in which a firm meets new government demand with a combination of new hiring and increasing existing workers average hours faced with hiring costs and an overtime premium the firm responds by increasing hours along both margins our model analysis also provides insight into how government spending policy should be structured to lower the cost of generating new jobs finally we catalogue survey evidence from recovery act fund recipients that reinforces the importance of the intensive labor margin

international asset pricing and portfolio diversification with time varying risk we test the conditional capital asset pricing model capm for the world s eight largest equity markets using a parsimonious generalized autoregressive conditional heteroskedasticity garch parameterization our methodology can be applied simultaneously to many assets and at the same time accommodate general dynamics of the conditional moments the evidence supports most of the pricing restrictions of the model but some of the variation in risk adjusted excess returns remains predictable during periods of high interest rates our estimates indicate that although severe market declines are contagious the expected gains from international diversification for a u s investor average 2 11 percent per year and have not significantly declined over the last two decades

closely competing firms and price adjustment some findings from an online marketplace we investigate retailers price setting behavior using a unique dataset containing by the second records of prices offered by closely competing retailers on a major japanese price comparison website first we find that when the average price of a product across retailers falls rapidly the frequency of price adjustments increases and the size of price adjustments becomes larger second we find positive autocorrelation in the frequency of price adjustments implying that there tends to be clustering where price adjustments occur in succession in contrast there is no such autocorrelation in the size of price adjustments these two findings indicate that the behavior of competing retailers is characterized by state dependent pricing rather than time dependent pricing

search frictions matching aggregate and establishment observations abstract we estimate a search model to match hours employment vacancies and unemployment at the micro and macrolevels we establish a set of facts concerning the variability of unemployment and vacancies in the aggregate and the distribution of net employment growth and the comovement of hours and employment growth at the establishment level a search model with non convex costs of posting vacancies establishment level profitability shocks and a contracting framework to set hours provides a structure to understand these observations the estimated model is able to capture both the aggregate and establishment level facts

evolution of international stock and bond market integration influence of the european monetary union abstract this paper examines the dynamic relationship between daily stock and government bond returns of selected countries over the past decade to infer the state and progress of inter financial market integration we proceed to empirically investigate the influence of the european monetary union emu on time variations in inter stock bond market integration segmentation dynamics using a two step procedure first we document the downward trends in time varying conditional correlations between stock and bond market returns in european countries japan and the us second we investigate the causality and determinants of this interdependent relationship in particular whether the various macroeconomic convergence criteria associated with the emu have played a significant role we find that real economic integration and the reduction in currency risk have generally had the desired effect on financial integration but monetary policy integration may have created uncertain investor sentiments on the economic future of the emu thereby stimulating a flight to quality phenomenon

can the markov switching model forecast exchange rates abstract a markov swirching model is fit for 18 exchange rates at quarterly frequencies the model fits well in sample for many exchange rates by the mean squared error criterion the markov model does not generate superior forecasts to a random walk or the forward rate there appears to ne some evidence that the forecasts of the markov model are superior at predicting the direction of change of the exchange rate

environmental regulation by private contest abstract it is widely expected that the recent trend in the us eu and elsewhere towards an increased role for private agents and agencies in the formulation and enforcement of environmental regulation will continue if environmental regulation is to be privatised in this way it is natural to ask how far the activities of environmental groups on whose shoulders much of the responsibility for defending the environment is likely to fall should be subsidised or taxed in this paper we identify the trade offs involved and characterise the optimal subsidy tax the analysis is argued to have significant implications for how governments should think about the way in which fiscal law treats environmental ngo s

the optimal initial allocation of pollution permits a relative performance approach the initial allocation of pollution permits is an important aspect of emissions trading schemes we generalize the analysis of bohringer and lange 2005 eur econ rev 49 8 2041 2055 to initial allocation mechanisms that are based on inter firm relative performance comparisons including grandfathering and auctions as well as novel mechanisms we show that using firms historical output for allocating permits is never optimal in a dynamic permit market setting while using firms historical emissions is optimal only in closed trading systems and only for a narrow class of allocation mechanisms instead it is possible to achieve social optimality by allocating permits based only on an external factor which is independent of output and emissions we then outline sufficient conditions for a socially optimal relative performance mechanism

partial adjustment without apology econometric partial adjustment models perform relatively well at the aggregate level however many kinds of microeconomic behavior involve discrete and occasional choices analyzing the classic employment adjustment problem we show how a generalized partial adjustment model tractably accommodates both observations by aggregating the actions of heterogeneous producers facing fixed adjustment costs aggregate disturbances cause changes in establishment level target employment and in the measure of establishments actively adjusting to their target whereas aggregate responses exhibit partial adjustment our framework also can be applied in general equilibrium settings with persistent idiosyncratic shocks without forfeiting the convenient use of linear solution methods

contest with pre contest investment abstract in a standard noisy contest more competition more contestants leads to lower individual equilibrium effort we show that when contestants can make pre contest investment to enhance their competency neither equilibrium investment nor individual effort is monotonic in the number of contestants individual effort may increase with the level of participation

environmental policy incentives to adopt advanced abatement technology abstract we investigate incentives through environmental policy instruments to adopt advanced abatement technology first we study the case where the regulator makes long term commitments to policy levels and does not anticipate arrival of new technology we show that taxes provide stronger incentives than permits auctioned and free permits offer identical incentives and standards may give stronger incentives than permits second we investigate scenarios where the regulator anticipates new technologies we show that with taxes and permits the regulator can induce first best outcomes if he moves after firms have invested whereas this does not always hold if he moves first

nonconvex factor adjustments in equilibrium business cycle models do nonlinearities matter recent empirical analysis has found nonlinearities to be important in understanding aggregated investment using an equilibrium business cycle model we search for aggregate nonlinearities arising from the introduction of nonconvex capital adjustment costs we find that while such costs lead to nontrivial nonlinearities in aggregate investment demand equilibrium investment is effectively unchanged our finding based on a model in which aggregate fluctuations arise through exogenous changes in total factor productivity is robust to the introduction of shocks to the relative price of investment goods

heterogeneity in consumer price stickiness we examine heterogeneity in price stickiness using a large original set of individual price data collected at the retail level for the computation of the french consumer price index for that purpose we estimate at a very high level of disaggregation a piecewise constant hazard model as well as competing risks duration models that distinguish between price increases price decreases and product replacements the main findings are the following a at the product outlet type level the baseline hazard function of a price spell is nondecreasing b cross product and cross outlet type heterogeneity is pervasive both in the shape and the level of the hazard function as well as in the impact of covariates c there is strong evidence of state dependence especially for price increases d there is an asymmetry because determinants of price increases differ from those of price decreases

have the gipsi settled down breaks and multivariate stochastic volatility models for and not against the european financial integration we investigate the integration of the european peripheral financial markets with germany france and the uk using a combination of tests for structural breaks and return correlations derived from several multivariate stochastic volatility models our findings suggest that financial integration intensified in anticipation of the euro further strengthened by the emu inception and amplified in response to the 2007 2008 financial crisis hence no evidence is found of decoupling of the equity markets in more troubled european countries from the core interestingly the uk despite staying outside the emu is not worse integrated with the gipsi than germany or france 2013 elsevier b v

rent seeking contest when the prize increases with aggregate efforts the objective of this article is to investigate contests in which efforts are productive tullock s standard rent seeking model is extended by making the rent itself increase with the aggregate efforts a positive externality is thereby introduced into the contest because a contender s private effort in quest of the rent generates a benefit for other contenders coupled with a negative externality presented in the standard rent seeking model the net effect on the social efficiency of the contest is a priori ambiguous it is shown that the extended contest generates socially wasteful excessive aggregate efforts

uncertainty and the employment dynamics of small and large businesses we examine the impact of uncertainty on employment dynamics alternative measures of uncertainty are constructed based on the survey of professional forecasters and regression based forecasting models for gdp growth inflation sp the impact on large businesses are generally non existent or weaker our results suggest that to truly understand the effects of uncertainty on employment dynamics we need to focus on the relatively smaller and entrepreneurial businesses we discuss implications for the framing of economic policy

the cross sectional dynamics of the us business cycle 1950 1999 abstract modern interest in business cycles has focussed on the co movements and correlations in the major macroeconomic aggregates in this paper we offer another dimension to business cycle analysis which looks at the time series of cross sectional distributions of the growth rates of sales by us quoted companies from 1950 to 1999 we detect correlations between aggregate business cycle fluctuations and the higher moments of the cross sectional distribution we find a significant negative correlation between the rate of growth of gdp and the cross sectional variance and skewness of growth rates of sales on the other hand there is positive correlation at business cycle frequencies with kurtosis in order to explore this further we turn to the dynamic evolution of firms and analyse the sensitivity of growth rates to aggregate shocks conditioning on firm size the results suggest that despite considerable heterogeneity macroeconomic shocks have pervasive effects that are however more pronounced for firms in the middle range of growth this has implications for both macro and industrial economics

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

a comment on the economics of labor adjustment mind the gap reply in earlier contributions ricardo j caballero and eduardo m r a engel 1993 hereafter ce and caballero et al 1997 hereafter ceh investigate labor dynamics using a methodology which postulates that employment changes depend on a gap between the actual and target levels of employment both studies find evidence of nonlinearities in aggregate timeseries data employment growth depends on the cross sectional distribution of employment gaps this finding is taken as evidence that nonlinear adjustment at the microeconomic level matters for aggregate time series this is important for business cycle and policy analysis as it implies macroeconomics must take the cross sectional distribution of employment gaps into account this paper questions the methodology and thus the conclusions of these studies we argue that these reported aggregate nonlinearities may be the consequence of mismeasurement of the gap rather than nonlinearities in plant level adjustment both ce and ceh rely upon a hypothesis that employment growth responds to a gap z between the desired and actual number of workers at a plant the advantage to the gap approach is that the choice of employment an inherently difficult dynamic optimization problem is characterized through a nonlinear relationship between and z that is the adjustment rate z is postulated to be a nonlinear function of z however there is no free lunch the desired number of workers and hence the employment gap is unobservable thus in order to confront data this approach needs an auxiliary theory to infer z from observed variables both ce and ceh use observed hours variations to infer the employment gap this inference is one element of our critique of the gap methodology to assess this methodology we simulate data from the solution of a dynamic model of labor adjustment assuming quadratic adjustment cooper department of economics university of texas austin tx 78712 e mail cooper eco utexas edu willis research department federal reserve bank of kansas city kansas city mo 64198 e mail jonathan willis kc frb org we are grateful to seminar participants at boston university emory university the university of british columbia the federal reserve bank of boston the university of haifa the university of iowa the university of michigan the university of pennsylvania the university of texas at austin the 2002 nber ef meeting and the 2000 cmsg conference at mcmaster university for comments and suggestions discussions with eduardo engel john haltiwanger daniel hamermesh peter klenow and christopher ragan were much appreciated the authors thank the nsf for financial support we also appreciate comments from the referees cooper thanks the federal reserve bank of minneapolis for its hospitality during revisions of this manuscript the views expressed herein are solely those of the authors and do not necessarily reflect the views of the federal reserve bank of kansas city the federal reserve bank of minneapolis or the federal reserve system 1 daniel hamermesh 1989 uses a gap methodology as well but does not adopt the approach of estimating a nonlinear hazard function explained below to infer the nature of adjustment costs hence we focus on ce and ceh in this discussion of methodology 2 we do not contest the general view of nonlinear employment adjustment at the plant level this finding is consistent with other evidence that points to inactivity as well as bursts of employment adjustment at the plant level for example hamermesh 1989 provides a revealing discussion of lumpy labor adjustment at a set of manufacturing plants steven davis and john haltiwanger 1992 document large employment changes at the plant level ceh also report evidence of inactivity in plant level employment adjustment there seems little doubt that an explanation of plant level employment dynamics requires a model of adjustment that is richer than the quadratic adjustment cost structure and includes some forms of nondifferentiability and or nonconvexity 3 as the gap approach is used in numerous other applications capital adjustment durable adjustment price adjustment to approximate the solution to dynamic optimization problems our concerns may be relevant for those exercises as well

investment dynamics with fixed capital adjustment cost and capital market imperfections this paper examines the implications of financing frictions on capital stocks and on capital accumulation in the presence of non convex costs of adjusting the capital stock in this setup finance has an influence on both the level of capital and the timing of investment finance and productivity are complements and finance influences investment the strongest when firms wish to significantly adjust capital for fundamental reasons these theoretical considerations are confronted with uk data while finance is mostly irrelevant for long term capital decision the short run investment function shows a significant impact of finance which is also strongest for strong fundamental investment incentives

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

the net benefits of incentive based regulation a case study of environmental standard setting economists interested in environmental safety and health regulation have long argued that decentralized incentive based or ib policies are more efficient than centralized command and control or cac approaches see charles schultze 1977 for instance these arguments generally have been based on the assumption that ib policies will accomplish the same goals as their cac counterparts but at less cost to society however some of those touting ib policies have overlooked an important point environmental workplace or even productsafety standards typically take the form of maximum permissible concentrations of harmful substances so that compliance only requires that all monitoring points or samples register readings below these critical levels for this reason ib policies typically assign a shadow price of zero to improvements that exceed the standard s while more crude cac policies generally result in overcontrol beyond the standards if there is no value to this overcontrol cac policies will not improve at all on ib approaches and will indeed be more expensive if however reduced concentrations below the level of the standards bring with them further improvements in health or the environment cac approaches will produce greater benefits than ib approaches thus a fair comparison between the two necessitates that any additional benefits associated with cac policies be offset against the cost advantages enjoyed by their ib counterparts although this possibility has been recognized by others scott atkinson and t h tietenberg 1982 for instance it is little appreciated and its empirical significance has never been ascertained that is our purpose here we do so by developing data on the costs and benefits of controlling a common air pollutant total suspended particulates or tsp in baltimore by comparing the tsp levels likely under both ib and cac approaches we are able to estimate the marginal costs and benefits associated with a variety of alternative air quality standards which take the form of maximum permissible concentrations this in turn allows us to determine the net benefits arising from the two kinds of regimes in the next section we present a simple conceptual framework for our analysis section ii describes the estimation of the costs and benefits of our hypothesized air pollution controls in baltimore section iii presents our somewhat surprising findings and section iv discusses those findings and their potential significance for regulation in the real world

microdata evidence on the empirical importance of selection effects in menu cost models we use microdata on product prices linked to information on the producing firms that set them to study to what extent the timing of price changes reacts to changes in marginal cost this self selec

estimation of garch process in the presence of structural change abstract this paper blends the switching regression model of goldfeld and quandt 1973 with the garch model of bollerslev 1987 in order to estimate and test for the significance of garch parameters in the presence of structural breaks the garch parameter values the switch date at which one regime supersedes another and the gradualness of each regime switch are all determined endogenously

estimating unemployment inflows outflows and long term unemployment in britain using the cointegration approach a model is estimated of flows into and out of unemployment using the johansen multivariate cointegration approach and uk data for the period 1974q4 to 1993q3 two long run equilibrium relationships are obtained covering the outflow rate and unemployment duration which include variables such as the replacement ratio structural change and output a unique feature of the model is that it allows the inflow rate to determine the outflow rate and vice versa this is argued to be important given the common european stylized fact that inflows and outflows are both countercyclical and strongly correlated thus if firms and workers are heterogeneous hiring and firing is contemporaneous necessitating the type of model estimated here some interesting results include the finding that output is not important in determining the outflow rate and that the speed of adjustment of the outflow rate to changes in its underlying equilibrium is slow in contrast the proportion of long term unemployed is positively re

a theory of yardstick competition in the typical regulatory scheme a franchised monopoly has little incentive to reduce costs this article proposes a mechanism in which the price the regulatedfirm receives depends on the costs of identical firms in equilibrium each firm chooses a socially efficient level of cost reduction the mechanism generalizes to cover heterogeneous firms with observable differences medicare s prospective reimbursement of hospitals by using diagnostically related groups is a scheme very similar to the one outlined here

economic theory and the world of practice a celebration of the s s model it was the question of how best to balance the costs of ordering and of running out of stock against the costs of holding excess inventory that inspired kenneth arrow theodore harris and jacob marschak to introduce the s s model in 1951 in this celebratory article we show how this model not only answered important practical questions but also opened the door to a quite startling range of important and challenging follow up questions many of great practical importance and analytic depth the s s model has become one of the touchstone models of economics opening new vistas of applied economic theory to all who internalize its structure today it is universally applied to solve questions faced in inventory control the core model elements uncertainty and fixed costs of adjustment are ubiquitous which has resulted in its becoming the general purpose economic model of discrete adjustment the s s model has also become a profound source of inspiration for macroeconomists seeking to understand the role that discrete microeconomic adjustments play in macroeconomic fluctuations looking forward we foresee rapid growth in the use of s s modeling to aid households making complex and costly financial decisions such as when and how to terminate a mortgage in the projected era of household operations research new modeling challenges will arise due to enriched feedback from the world of practice

three strikes and you re out reply to cooper and willis cooper and willis 2003 is the latest in a sequence of criticisms of our methodology for estimating aggregate nonlinearities when microeconomic adjustment is lumpy their case is based on reproducing our main findings using artificial data generated by a model where microeconomic agents face quadratic adjustment costs that is they supposedly find our results where they should not be found the three claims on which they base their case are incorrect their mistakes range from misinterpreting their own simulation results to failing to understand the context in which our procedures should be applied they also claim that our approach assumes that employment decisions depend on the gap between the target and current level of unemployment this is incorrect as well since the gap approach has been derived formally from at least as sophisticated microeconomic models as the one they present on a more positive note the correct interpretation of cooper and willis s results shows that our procedures are surprisingly robust to significant departures from the assumptions made in our original derivations

a model of benchmarking regulation revisiting the efficiency of environmental standards the conventional economic argument favors the use of market based instruments over command and control regulation this viewpoint however is often limited in the description and characteristics of the latter namely environmental standards are often portrayed as lacking structured abatement incentives yet contemporary forms of command and control regulation such as standards stipulated via benchmarking have the potential to be efficient we provide a first formal analysis of environmental standards based on performance benchmarks we show that under specific conditions standards can provide efficient incentives to improve environmental performance

estimating a new keynesian phillips curve with a corrected measure of real marginal cost evidence in japan we estimate a new keynesian phillips curve nkpc in japan focusing on the measurement of real marginal cost rmc especially we correct labor share by taking account of two kinds of labor market frictions i labor adjustment costs and ii real wage rigidity our results show that the consideration of these labor market frictions greatly improves the fit of japan s nkpc furthermore if we additionally incorporate materials prices in the calculation of rmc then the fit of the nkpc is further improved our most important finding is that the conventional backward looking component is no more needed to explain japan s inflation dynamics if we use a corrected measure of rmc

capital adjustment patterns in swedish manufacturing firms what model do they suggest in this paper we study the capital adjustment process in swedish manufacturing firms and relate the empirical findings to standard models of firm behavior in the presence of impediments to capital adjustments we find that i a model with irreversible capital goes a very long way in capturing the salient features of firm level capital adjustment behavior to see this an integrated approach is necessary since different alternative models do well in certain comparative dimensions but not in others ii the partial adjustment model generally fails to explain capital adjustment patterns iii the capital accumulation process is a highly volatile and non persistent process on the firm level iv firms adjustment behavior is asymmetric in that they are more likely to tolerate excess capital than shortages of capital and finally v the estimated adjustment function implies that aggregate investment is relatively unresponsive to aggregate shocks in deep recessions as compared to the responsiveness in normal times

refunded emission payments theory distribution of costs and swedish experience of nox abatement in this paper we discuss the effect of refunding environmental charges taxes are often resisted by polluters because they imply both abatement and tax costs when charges are refunded the incentives for abatement are essentially the same as for a tax as long as there are many producers the incidence and distribution of costs is however different lower net tax payments reduce resistance from the polluters and make refunded emissions payments politically easier to implement at a sufficiently high charge level to have significant abatement effects we describe and examine the refunded emissions payment scheme as a policy instrument and compare it with taxes and permits with regard to allocative properties distribution of costs property rights and consequently the politics of implementation as an empirical example the swedish charge on nitrogen oxides is analyzed

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

the cyclical behavior of marginal cost and price the author examines the cyclical behavior of price marginal cost margins for u s manufac turing after 1956 short run marginal cost is markedly procyclical this is primarily due to procyclical overtime payments incurred beca use employment is not perfectly flexible in most industries output price fails to respond to the cyclical movement in marginal cost so price marginal cost margins are markedly countercyclical the res ults contradict business cycle theories that explain low production i n a recession by a high real cost of producing they support theories that explain low production in a recession by the inability of firms to sell their output copyright 1987 by american economic association

rational expectations econometric analysis of changes in regime an investigation of the term structure of interest rates abstract this paper is of interest both for its methodological contribution of new tools for analyzing rational expectations models and for its substantive conclusions concerning the term structure of interest rates during the monetary experiment of october 1979 the paper studies systems subject to changes in regime interpreted here as occasional discrete shifts in the parameters governing the time series behavior of exogenous economic variables the specification is shown to be quite tractable both theoretically and empirically the technique is used to analyze yields on three month treasury bills and ten year treasury bonds during 1962 to 1987 a constant parameter linear model for short term rates is shown to be inconsistent both with the univariate time series properties of short rates and with the observed bivariate relation between long and short rates under the expectations hypothesis of the term structure an alternative nonlinear model that admits the possibility of changes in regime affords a much better description of the univariate process for short rates moreover the cross equation restrictions implied by the expectations hypothesis of the term structure are consistent with the nonlinear specification indeed the residuals of the restricted relation have a standard error of only 0 8 basis points this is a third less than that of a completely unrestricted linear regression of long rates on short rates and compares with an unconditional standard deviation of long rates of 142 basis points i conclude that once the recognition by bond traders of changes in regime is taken into account the expectations hypothesis of the term structure of interest rates holds up fairly well for these data

consumption commitments and habit formation we analyze the implications of household level adjustment costs for the dynamics of aggregate consumption we show that an economy in which agents have consumption commitments is approximately equivalent to a habit formation model in which the habit stock is a weighted average of past consumption if idiosyncratic risk is large relative to aggregate risk consumption commitments can thus explain the empirical regularity that consumption is excessively sensitive and excessively smooth findings that are typically attributed to habit formation unlike habit formation and other theories but consistent with empirical evidence the consumption commitments model also predicts that excess sensitivity and smoothness vanish for large shocks these results suggest that behavior previously attributed to habit formation may be better explained by adjustment costs we develop additional testable predictions to further distinguish the commitment and habit models and show that the two models have different welfare implications

coarse pricing policies the muted volatility of inflation during the great recession and its aftermath has refocused attention on the constraints that firms face when adjusting prices using new empirical and theoretical results i argue that each firm s choice of how much information to acquire to set prices plays a central role in determining the patterns of pricing at the product level and the degree of aggregate price rigidity in response to shocks in support of the information channel i present product level evidence that firms price goods using coarse pricing policies that are updated infrequently and consist of a small menu of prices firms are heterogeneous in the complexity and duration of their pricing policies and this heterogeneity is reflected in differential responses to the great recession cycle with firms exhibiting more complex policies responding more aggressively i develop a theory of information constrained price setting that generates coarse pricing endogenously and quantitatively matches the discreteness duration and volatility of policies in the data the information friction dampens the responsiveness of prices to shocks and coupled with heightened volatility induces firms to keep prices relatively high to protect against losses in an uncertain environment

plant level irreversible investment and equilibrium business cycles this paper evaluates the importance of microeconomic irreversibilities for aggregate dynamics using a real business cycle rbc model characterized by investment irreversibilities at the establishment level the main finding is that investment irreversibilities do not play a significant role in an otherwise standard realbusiness cycle model even though investment irreversibilities are crucial for establishment level dynamics aggregate fluctuations are basically the same under fully flexible or completely irreversible investment jel e22 e32

a comment on the economics of labor adjustment mind the gap rejoinder numerous papers in this literature have used these questions as motivation understanding the structure of labor adjustment costs is relevant any time a policy or forecasting question requires input on the properties of labor dynamics of course for some policy questions we are interested in the aggregate effects of policies hence understanding whether nonconvexities have implications for aggregate labor demand is crucial as well in terms of the ongoing discussion over these questions there seems to be agreement that the simple quadratic adjustment cost model is not an adequate representation of the costs plants face in adjusting the number of workers from data displayed by daniel hamermesh 1989 and caballero et al 1997 hereafter ceh one is certainly struck by both the inactivity of labor adjustment and the bursts of job creation and destruction at the plant level that said while these observations serve as evidence against a model which contains only quadratic adjustment costs they do not directly identify a particular structure of adjustment costs at the plant level inspection of the adjustment patterns reported in ceh though cast in terms of gaps does provide some evidence of partial adjustment and thus suggests the presence of both convex and nonconvex adjustment costs further caballero and engel 1993 hereafter ce and ceh appear to have provided useful evidence on the second question the nonlinearities they uncover in aggregated data suggest that nonconvexities at the plant level have aggregate implications

enforcement costs and the choice of policy instruments for controlling pollution i introduction when evaluating policy instruments for controlling pollution analysts generally agree that economic incentives are superior to direct controls in terms of minimizing abatement costs however when it comes to minimizing enforcement costs there is no such agreement some analysts such as freeman et al 1973 and anderson et al 1977 argue that economic incentives would be much easier to enforce than direct controls while others such as drayton 1978 argue that they would be virtually unenforceable the debate typically centers on technical difficulties in continuously monitoring emissions and to a lesser extent on political and legal issues related to the assessment of penalties 1 an issue that has not been examined is whether there are economic reasons for enforcement costs to vary across policy instruments although there is now a sizable economic literature on the problem of noncompliance with pollution control policies there have been no attempts to formally compare enforcement costs across policy instruments 2 accordingly the purpose of this note is to examine whether there are economic grounds for arguing that enforcement costs would be lower for economic incentives than direct controls 3 the policy instruments compared are marketable permits or emissions taxes and uniform standards the instruments are compared in a setting where the penalty schedule is previously specified by some judicial or legislative body and the regulator s enforcement policy is limited to the choice of audit frequency the analysis is based on the premise that for any policy instrument that targets emissions the regulator will have to periodically monitor emissions and assess penalties for noncompliance the relevant question then is whether less frequent monitoring would be required to ensure compliance with economic incentives casual analysis suggests this should be the case economic incentives minimize aggregate abatement costs and lower abatement costs imply lower costs to firms of complying this should imply in turn that less stringent enforcement is needed to achieve compliance this argument although intuitively appealing is flawed using a simple model of pollution control with costly enforcement i show that enforcement costs narrowly defined may be higher for economic incentives for purposes of exposition the result is established in a setting where the regulator ensures each firm is fully compliant however as shown in the appendix the result generalizes to the more realistic setting where firms are partially compliant ii the model consider a group of n risk neutral firms emitting a single pollutant for simplicity the damages from the pollutant are assumed to depend only on total emissions each firm s abatement costs are given by a strictly convex function c sub i x sub i that is decreasing in emissions x sub i the firm s maximum emissions level is denoted mathematical expression omitted and is defined by mathematical expression omitted with probability p sub i a regulator audits each firm and measures its emissions if the regulator finds the firm s actual emissions x sub i exceed its allowed emissions s sub i the firm is assessed a fine of f x sub i s sub i as is common in the literature on enforcement i assume the fine schedule is previously specified e g by a legislative body 4 thus the regulator can choose the probability with which it audits firms but not the fine it assesses for noncompliance i assume the fine schedule is such that both the total fine and marginal fine are increasing in the violation size x sub i s sub i f prime is greater than 0 and f prime prime is grater than 0 because the regulator is assumed to ensure full compliance no violations occur and no fines are collected therefore enforcement costs consist solely of auditing or monitoring costs to simplify the analysis the cost of conducting an audit a is assumed to be the same across firms

microeconomic adjustment hazards and aggregate dynamics the basic premise of this paper is that understanding aggregate dynamics requires considering that agents are heterogeneous and that they do not adjust continuously to the shocks they perceive we provide a general characterization of lumpy behavior at the microeconomic level in terms of an adjustment hazard function which relates the probability that a unit adjusts to the deviation of its state variable from its moving target we characterize rich cross sectionally dependent aggregate dynamics generated by nonconstant hazards we present an example based on u s manufacturing employment and job flows and find that increasinghazard models outperform constant hazard partial adjustment models in describing aggregate employment dynamics

machine replacement and the business cycle lumps and bumps this paper explores investment fluctuations due to discrete changes in a plant s capital stock the resulting aggregate investment dynamics are surprisingly rich reflecting the interaction between a replacement cycle the cross sectional distribution of the age of the capital stock and an aggregate shock using plant level data lumpy investment is procyclical and more likely for older capital further the predicted path of aggregate investment that neglects vintage effects tracks actual aggregate investment reasonably well however ignoring fluctuations in the cross sectional distribution of investment vintages can yield predictable nontrivial errors in forecasting changes in aggregate investment

monitoring and enforcement of environmental regulations lessons from a natural field experiment in norway abstract relying on a small natural field experiment conducted by the norwegian environmental protection agency i estimate effects of three fundamental elements of most monitoring and enforcement practices self reporting audit frequency and specific deterrence i find evidence of under reporting of violations in firms self audits as more violations are detected in on site audits than in self audits announcing the increased audit frequency has no effect on firms compliance but an audit raises subsequent compliance substantially

labor demand and the structure of adjustment costs this study examines the costs firms face in adjusting labor demand to exogenous shocks evidence on monthly plant level data shows that adjustment proceeds in jumps employment is unchanged in response to small shocks but moves instantaneously to a new equilibrium if the shocks are large results in the large literature that assumes smooth adjustment are due to aggregation of this nonlinear relation the finding has implications for cyclical changes in productivity for severance pay layoff and plant closing restrictions and for all other policies that affect the cost of adjusting employment copyright 1989 by american economic association

aggregate employment dynamics building from microeconomic evidence this paper studies quarterly employment flows of approximately 10 000 u s manufacturing establishments the authors use establishments hours week to construct measures of the deviation between desired and actual employment and use these as the establishments main state variables the main findings are 1 microeconomic adjustment functions are nonlinear with plants adjusting disproportionately to large shortages 2 adjustments are often either large or nil suggesting the presence of nonconvexities in the adjustment cost technologies 3 the bulk of average employment fluctuations is accounted for by aggregate rather than reallocation shocks and 4 microeconomic nonlinearities amplify the impact of large aggregate shocks copyright 1997 by american economic association

what do residuals from first order conditions reveal about dge models the first order condition foc associated with labour in many dynamic general equilibrium models involves only current period variables residuals constructed from this foc are inconsistent with aggregate us data in that they are very large and highly persistent the persistence suggests that models which introduce dynamic terms in the labour foc may be more consistent with the data three such models one with learning by doing one with habit formation and one with labour adjustment costs confirm that they can reduce the persistence in the residuals making the models more consistent with the joint dynamics of consumption output and hours

a stochastic volatility model with markov switching this article presents a new way of modeling time varying volatility we generalize the usual stochastic volatility models to encompass regime switching properties the unobserved state variables are governed by a first order markov process bayesian estimators are constructed by gibbs sampling high medium and low volatility states are identified for the standard and poor s 500 weekly return data persistence in volatility is explained by the persistence in the low and the medium volatility states the high volatility regime is able to capture the 1987 crash and overlap considerably with four u s economic recession periods

effective labor regulation and microeconomic flexibility abstract microeconomic flexibility is at the core of economic growth in modern market economies because it facilitates the process of creative destruction the main reason why this process is not infinitely fast is the presence of adjustment costs some of them technological others institutional chief among the latter is labor market regulation while few economists object to the hypothesis that labor market regulation hinders the process of creative destruction its empirical support is limited in this paper we revisit this hypothesis using a new sectoral panel for 60 countries and a methodology suitable for such a panel we find that job security regulation clearly hampers the creative destruction process especially in countries where regulations are likely to be enforced moving from the 20th to the 80th percentile in job security in countries with strong rule of law cuts the annual speed of adjustment to shocks by a third while shaving off about 1 from annual productivity growth the same movement has negligible effects in countries with weak rule of law

balladurette and juppette a discrete analysis of scrapping subsidies this paper studies the effects of subsidies on durable goods markets in particular we focus on a recent policy in france in which the governments of balladur and juppe subsidized the replacement of old cars with new ones to study this policy we construct a dynamic stochastic discrete choice model of car ownership at the household level the resulting decision rules and equilibrium conditions are used to estimate the underlying parameters of the model using aggregate data these policy functions are used to evaluate the short and long run effects of the french policies we find that these policies do stimulate the automobile sector in the short run but through the induced changes in the cross sectional distribution of car ages create the basis for subsequent low activity further while these policies increase government revenues in the short run revenues in the long run are lower relative to a baseline without intervention

the effects of the introduction of the euro on the volatility of european stock markets abstract have convergence of european economies and introduction of the euro produced some effects on european stock markets theory suggests that stabilization of fundamentals should decrease variance of stock returns for historically unstable stock markets we test this proposition with daily data for the period january 1988 may 2000 and apply a three regime markov switching model for the variance covariance matrix among several stock indices including the uk and the us the analysis shows that introduction of the euro after an initial burst of volatility common to all european stock markets has indeed stabilized the spanish and italian stock markets

dynamic incentives by environmental policy instruments a survey abstract in this paper i survey and discuss recent developments on the incentives provided by environmental policy instruments for both adoption and development of advanced abatement technology a main conclusion to be drawn from the literature is that under competitive conditions market based instruments usually perform better than command and control moreover taxes may provide stronger long term incentives than tradable permits if the regulator is myopic if the government can anticipate new technology or is able to react on it optimally regulatory policies by virtue of administered prices taxes and policies by setting quantities issuing tradable permits are almost equivalent the literature also shows that under competitive conditions there is no difference between auctioning permits and grandfathering moreover timing and commitment of environmental policy is not crucial for adoption under competitive conditions commitment has positive incentive effects however if an r d sector has market power in the presence of market imperfections the ranking of the different policy instruments is ambiguous

cap and trade taxes and distributional conflict enacting market based environmental regulation such as emissions taxes and cap and trade programs often create rents that are contested by agents in this paper we create a framework that compares social welfare from alternative market based environmental policy instruments under the presence of rent seeking we show that contrary to the commonly held view non revenue raising instruments nrris are in many cases preferable over revenue raising instruments rris we find that the choice of instrument depends on the size of a potential revenue recycling effect and the level of preassigned rents

a markov model of switching regime arch in this article i present a new approach to model more realistically the variability of financial time series i develop a markov arch model that incorporates the features of both hamilton s switching regime model and engle s autoregressive conditional heteroscedasticity arch model to examine the issue of volatility persistence in the monthly excess returns of the three month treasury bill the issue can be resolved by taking into account occasional shifts in the asymptotic variance of the markov arch process that cause the spurious persistence of the volatility process i identify two periods during which there is a regime shift the 1974 2 1974 8 period associated with the oil shock and the 1979 9 1982 8 period associated with the federal reserve s policy change the variance approached asymptotically in these two episodes is more than 10 times as high as the asymptotic variance for the remainder of the sample i conclude that regime shifts have a greater impact on the properties of the data and i ca

transitional politics emerging incentive based instruments in environmental regulation abstract this paper proposes a positive theory of environmental instrument choice we study a democratic society that seeks to lower the level of pollution from industrial sources to a pre specified target the target can be implemented by one of three instruments s uniform emission standards p tradeable permits and t emission taxes the conflict of interest between special interests representing polluters and the electorate is resolved by an elected politician we characterize when each of the three policy instruments is chosen in political equilibrium and show that the transition observed in many countries from s to either p or t can be understood as a natural consequence of increasingly ambitious environmental targets

a comment on the economics of labor adjustment mind the gap evidence from a monte carlo experiment reply this comment addresses a point raised in russell cooper and jonathan willis 2003 2004 which discusses whether the gap approach is appropriate to describe the adjustment of production factors they show that this approach to labor adjustment as applied in ricardo j caballero eduardo engel and john c haltiwanger 1997 and caballero and engel 1993 can falsely generate evidence in favor of nonconvex adjustment costs even if costs are quadratic simulating a dynamic model of firm level employment decisions with quadratic adjustment costs and estimating a gap model from the simulated data they identify two factors producing this spurious evidence approximating dynamic adjustment targets by static ones and estimating the static targets themselves this comment reassesses whether the first factor indeed leads to spurious evidence in favor of fixed adjustment costs we show that the numerical approximation of the productivity process is pivotal for cooper and willis s finding with more precise approximations of the productivity process it becomes rare to falsely reject the quadratic adjustment cost model due to the approximation of dynamic targets by static ones jel e24 j3

on the interaction of financial frictions and fixed capital adjustment costs evidence from a panel of german firms abstract this paper analyzes the interaction of financial frictions and non convex adjustment costs non convex adjustment costs imply that firm level investment is lumpy firms invest infrequently but each investment is large this allows financial variables to influence investment along two margins they can alter the size of the stock of capital a company wishes to hold in the long run or they can influence the frequency at which investment projects are undertaken the empirical analysis of this paper reveals that finance has nearly no long run influence on the stock of capital in a sample of german companies by contrast the influence of finance on investment decisions is substantial consequently finance primarily affects investment frequencies and financial factors and fundamental capital productivity strongly interact in the determination of investment

persistence in variance structural change and the garch model this article examines the persistence of the variance as measured by the generalized autoregressive conditional heteroskedasticity garch model in stock return data in particular we investigate the extent to which persistence in variance may be overstated because of the existence of and failure to take account of deterministic structural shifts in the model both an analysis of daily stock return data and a monte carlo simulation experiment confirm the hypothesis that garch measures of persistence in variance are sensitive to this type of model misspecification