the policy preferences of the us federal reserve in this paper we model and explain us macroeconomic outcomes subject to the discipline that monetary policy is set optimally exploiting the restrictions that come from optimal policymaking we estimate the parameters in the federal reserve s policy objective function together with the parameters in its optimization constraints for the period following volcker s appointment as chairman we estimate the implicit inflation target to be around 1 4 and show that policymakers assigned a significant weight to interest rate smoothing we show that the estimated optimal policy provides a good description of us data for the 1980s and 1990s

make to order or make to stock model and application some firms make all their products to order while others make them to stock there are a number of firms that maintain a middle ground where some items are made to stock and others are made to order this paper was motivated by a consumer product company faced with the decision about which items to make to stock and which ones to make to order and the inventory and production policy for the make to stock items the production environment is characterized by multiple items setup times between the production of consecutive items limited capacity and congestion effects in such an environment making an item to order reduces inventory costs for that item but might increase the lot size and inventory costs for the items made to stock also lead times increase because of congestion effects resulting in higher safety stocks for make to stock items and lower service levels for make to order items thus leading to a complex trade off we develop a nonlinear integer programming formulation of the problem we present an efficient heuristic to solve the problem which was motivated by key results for a special case of the problem without congestion effects that can be solved optimally we also develop a lower bound to evaluate the performance of the heuristic a computational study indicates that the heuristic performs well we discuss the application of the model in a large firm and the resulting insights we also provide insights into the impact of various problem parameters on the make to order versus make to stock decisions using a computational study in particular we find that the average number of setups of an item selected for make to stock production is always less than half the average number of setups of the item if it were to be made to order also factors other than an item s demand such as its setup time processing time and unit holding cost impact the make to order versus make to stock decision

learning and time varying macroeconomic volatility abstract this paper presents a dsge model in which agents learning about the economy can endogenously generate time varying macroeconomic volatility economic agents use simple models to form expectations and need to learn the relevant parameters their gain coefficient is endogenous and is adjusted according to past forecast errors the model is estimated using likelihood based bayesian methods the endogenous gain is jointly estimated with the structural parameters of the system the estimation results show that private agents appear to have often switched to constant gain learning with a high constant gain during most of the 1970s and until the early 1980s while reverting to a decreasing gain later on as a result the model can generate a pattern of volatility which is increasing in the 1970s and falling in the second half of the sample with a decline that can roughly match the magnitude of the so called great moderation in the 1984 2007 period the paper also documents how a failure to incorporate learning into the estimation may lead econometricians to spuriously find time varying volatility in the exogenous shocks even when these have constant variance by construction

the role of investment specific technological change in the business cycle this is a quantitative investigation of the importance of technological change speci c to new investment goods for postwar us aggregate uctuations a growth model that incorporates this form of technological change is calibrated to us data and simulated using the relative price of new equipment to identify the process driving investmentspeci c technology shocks the analysis suggests that this form of technological change is the source of about 30 of output uctuations 2000 elsevier science b v all rights reserved

how forward looking is optimal monetary policy we calculate optimal monetary policy rules for several variants of a simple optimizing model of the monetary transmission mechanism with sticky prices and or wages we show that robustly optimal rules can be represented by interest rate feedback rules that generalize the celebrated proposal of taylor 1993 optimal rules however require that the current interest rate operating target depend positively on the recent past level of the operating target and its recent rate of increase in a way that is characteristic of estimated central bank reaction functions but not of taylor s proposal we furthermore find that a robustly optimal policy rule is almost inevitably an implicit rule that requires the central bank to use a structural model to project the economy s evolution under the contemplated policy action however calibrated examples suggest that optimal rules place less weight on projections of inflation or output many quarters in the future than do rules often discussed in the literature on inflation targeting or in the current practice of inflation forecast targeting central banks

monetary policy shifts and the term structure we estimate the effect of shifts in monetary policy using the term structure of interest rates in our no arbitrage model the short rate follows a version of the taylor s 1993 discretion versus policy rules in practice carnegie rochester conference series on public policy 39 195 214 rule where the coefficients on the output gap and inflation vary over time the monetary policy loading on the output gap has averaged around 0 4 and has not changed very much over time the overall response of the yield curve to output gap components is relatively small in contrast the inflation loading has changed substantially over the last 50 years and ranges from close to zero in 2003 to a high of 2 4 in 1983 long term bonds are sensitive to inflation policy shifts with increases in inflation loadings leading to higher short rates and widening yield spreads

when credit bites back using data on 14 advanced countries between 1870 and 2008 we document two key facts of the modern business cycle relative to typical recessions financial crisis recessions are costlier and more credit intensive expansions tend to be followed by deeper recessions in financial crises or otherwise and slower recoveries we use local projection methods to condition on a broad set of macro economic controls to study how past credit accumulation impacts key macro economic variables such as output investment lending interest rates and inflation the facts that we uncover lend support to the idea that financial factors play an important role in the modern business cycle

testing for indeterminacy an application to u s monetary policy reply this paper considers a prototypical new keynesian model in which the equilibrium is undetermined if monetary policy is passive the likelihood based estimation of dynamic equilibrium models is extended to allow for indeterminacies and sunspot fluctuations we construct posterior weights for the determinacy and indeterminacy region of the parameter space and estimates for the propagation of fundamental and sunspot shocks according to the estimated model u s monetary policy post 1982 is consistent with determinacy whereas the pre volcker policy is not we find that before 1979 indeterminacy substantially altered the propagation of shocks

impact of introducing make to order options in a make to stock environment firms engaged in consumer product sales often implement a strict make to stock approach applying a single price to all customers in such systems customers can get the product at the given price upon availability on the shelf however consumers can often tolerate a delay between order placement and demand satisfaction under a price discount recognizing this phenomenon a supplier may consider offering a menu of delivery price options to consumers where longer delay time options imply lower prices demands from customers willing to wait provide advance demand information to the supplier this paper studies strategies to exploit this additional information to improve profitability and service levels primarily assuming that delivery times are set exogenously we determine optimal prices and stock levels under the new delayed demand satisfaction options in addition we develop analytical models to characterize the system performance gains under the new demand fulfillment option

estimation of a forward looking monetary policy rule a time varying parameter model using ex post data abstract in this paper we consider estimation of a time varying parameter model for a forward looking monetary policy rule by employing ex post data a heckman type 1976 the common structure of statistical models of truncation sample selection and limited dependent variables and a simple estimator for such models annals of economic and social measurement 5 475 492 two step procedure is employed in order to deal with endogeneity in the regressors this allows us to econometrically take into account changing degrees of uncertainty associated with the fed s forecasts of future inflation and gdp gap when estimating the model even though such uncertainty does not enter the model directly we achieve efficiency in estimation by employing the standardized prediction errors for inflation and gdp gap as bias correction terms in the second step regression we note that no other empirical literature on monetary policy deals with this important issue our empirical results also reveal new aspects not found in the literature previously that is the history of the fed s conduct of monetary policy since the early 1970s can in general be divided into three subperiods the 1970s the 1980s and the 1990s the conventional division of the sample into pre volcker and volcker greenspan periods could mislead the empirical assessment of monetary policy

learning about monetary policy rules abstract we study macroeconomic systems with forward looking private sector agents and a monetary authority that is trying to control the economy through the use of a linear policy feedback rule we use stability under recursive learning a la evans and honkapohja learning and expectations in macroeconomics princeton university press princeton new jersey 2001 as a criterion for evaluating monetary policy rules in this context we find that considering learning can alter the evaluation of alternative policy rules

changes in federal reserve preferences abstract using a model of optimizing central bank behavior i estimate the dynamic behavior of preferences which are captured by the relative weight put on stabilizing inflation versus minimizing the output gap unlike previous work i let this parameter vary continuously over time there is a drastic but steady rise in the weight on inflation around the appointment of paul volcker however i find variation in preferences throughout the sample period the results suggest that preference changes have been more complex than typically assumed in the literature the estimated preference series is used to perform counterfactual experiments and to construct a new measure of monetary shocks

indeterminacy and learning an analysis of monetary policy in the great inflation abstract the great inflation of the 1970s can be understood as the result of equilibrium indeterminacy in which loose monetary policy engendered excess volatility in macroeconomic aggregates and prices the federal reserve inadvertently pursued policies that were not anti inflationary enough because it did not fully understand the economic environment it was operating in specifically it had imperfect knowledge about the structure of the economy and was subject to data misperceptions the combination of learning about the economy and the use of mis measured data resulted in policies which the federal reserve believed to be optimal but when implemented led to equilibrium indeterminacy

stepping on a rake the role of fiscal policy in the inflation of the 1970s abstract the inflation of the 1970s in the us is often discussed as if the only type of policy action that could have prevented the inflation were monetary policy actions and the only type of policy errors that might have induced the inflation were monetary policy errors yet fiscal policy underwent dramatic shifts in the 1970s and economic theory makes clear that in an environment of uncertainty about future fiscal policy monetary policy instruments may lose potency or have perverse effects this paper documents the vagaries of fiscal policy in this period and argues that people at the time must have been uncertain about fiscal policy s future course it also lays out a theoretical framework for understanding the effects of fiscal uncertainties on monetary policy and shows that fiscal variables have predictive value in dynamic models even if traditional monetary policy indicators are included in the system

bad luck bad policy and learning a markov switching approach to understanding postwar u s macroeconomic dynamics abstract this paper evaluates the role of monetary policy in understanding the u s post war macroeconomic fluctuations we construct a medium size dsge model in which the central bank through a real time learning process can make mistakes in estimating key elasticities between macroeconomic aggregates and the central banks objectives may change over time the model also features time varying volatilities of non policy shocks we find that misperceptions of the persistence of inflation and the slope of the phillips curve could affect optimal monetary policy decision making therefore their accurate prediction is key for achieving successful monetary policy outcomes in addition we argue that the monetary policy shift geared toward inflation stabilization in the late 1970s changed the composition of output making the marginal efficiency of investment shock that proxies for the functioning of the financial sector the most important contributor to the business cycle

credit induced boom and bust this paper exploits the federal preemption of national banks in 2004 from local laws against predatory lending to gauge the effect of the supply of credit on the real economy first the preemption regulation resulted in an 11 increase in annual lending in the 2004 2006 period which is associated with a 3 3 rise in annual house price growth rate and a 2 2 expansion of employment in nontradable sectors this was followed by a sharp decline in subsequent years furthermore we show that the increase in the supply of credit reduced delinquencies during boom years but increased them in bust years received june 7 2015 editorial decision december 22 2016 by editor robin greenwood

the time varying volatility of macroeconomic fluctuations we investigate the sources of the important shifts in the volatility of us mac roeconomic variables in the postwar period to this end we propose the esti mation of dsge models allowing for time variation in the volatility of the structural innovations we apply our estimation strategy to a large scale model of the business cycle and find that shocks specific to the equilibrium condition of investment account for most of the sharp decline in volatility of the last two decades jel c51 e32

regime switches agents beliefs and post world war ii u s macroeconomic dynamics the evolution of inflation and output over the last 50 years is examined through the lens of a micro founded model that allows for changes in the behavior of the federal reserve and in the volatility of structural shocks agents are aware of the possibility of regime changes and their beliefs have an impact on the law of motion underlying the macroeconomy the results support the view that there were regime switches in the conduct of monetary policy however the behavior of the federal reserve is identified by repeated fluctuations between a hawk and a dove regime instead of by the traditional pre and post volcker structure counterfactual simulations show that if agents had anticipated the appointment of an extremely conservative chairman inflation would not have reached the peaks of the late 70s and the inflation output trade off would have been less severe these beliefs counterfactuals are new in the literature finally the paper provides a bayesian algorithm to handle the technical difficulties that arise in a rational expectations model with markov switching regimes

optimal interest rate smoothing this paper considers the desirability of the observed tendency of central banks to adjust interest rates only gradually in response to changes in economic conditions it shows in the context of a simple model of optimizing private sector behaviour that assignment of an interest rate smoothing objective to the central bank may be desirable even when reduction of the magnitude of interest rate changes is not a social objective in itself this is because a response of policy to irrelevant lagged variables may be desirable owing to the way it steers private sector expectations of future policy

multiple regimes in u s monetary policy a nonparametric approach we use two different nonparametric methods to determine whether there were multiple regimes in u s monetary policy over the period 1955 2003 we model monetary policy using two different versions of taylor s rule for the nominal interest rate target by contrast with parametric tests for regime changes the nonparametric methods we use allow the data to determine the dimensions on which to split the sample for purposes of estimating the coefficients of the taylor rule we find evidence for a few structural breaks and consistent agreement between our two nonparametric methods on the dating of those breaks

learning in an estimated medium scale dsge model in this paper we evaluate the empirical relevance of learning by private agents in an estimated medium scale dsge model we replace the standard rational expectation assumption in the smets and wouters 2007 model by a constant gain learning mechanism if agents know the correct structure of the model and only learn about the parameters both expectation mechanisms resultin asimilarfit and onlythetransition dynamicsthatare generated byspecific initial beliefs can distinguish the two approaches if in addition agents use only a reduced information set in forming the perceived law of motion the implied model dynamics change and for some initial beliefs the marginal likelihood of the model is further improved however the estimated gain parameter is estimated to be small which suggests a crucial role for the initial beliefs to explain the improved fit the learning models with the highest posterior probabilities add some additional persistence to the dsge model that reduce the gap between the irfs of the dsge model and the more data driven dsge var model however the additional dynamics that are introduced by the learning process do not systematically alter the estimated structural parameters related to the nominal and real frictions in the dsge model jel codes c11 d84 e30 e52

monetary policy regime shifts and inflation persistence abstract using bayesian methods we estimate a markov switching new keynesian msnk model that allows shifts in the monetary policy reaction coefficients and shock volatilities with u s data we find that a more aggressive monetary policy regime was in place after the volcker disinflation and before 1970 than during the great inflation of the 1970s our estimates also indicate that a low volatility regime has been in place during most of the sample period after 1984 we connect the timing of the different regimes to a measure of inflation persistence

monetary policy and asset prices a markov switching dsge approach summary this paper estimates a markov switching dynamic stochastic general equilibrium model by incorporating stock prices in monetary policy rules in order to identify the federal reserve s stance toward them based on the data from 1984 q1 to 2009 q2 i find that historical evidence of the policy reaction toward stock prices is weak except for the stock market bubble of the 1990s a counterfactual exercise shows that the rapid growth in stock prices during that period would have been significantly higher if monetary policy had been independent of the stock market however unconditional macroeconomic volatility increases with the degree of policy responsiveness toward stock prices copyright 2017 john wiley sons ltd

has monetary policy become more effective we investigate the implications of changes in the structure of the u s economy for monetary policy effectiveness estimating a vector autoregression over the pre and post 1980 periods we provide evidence of a reduced effect of monetary policy shocks in the latter period we estimate a structural model that replicates well the economy s response in both periods and perform counterfactual experiments to determine the source of the change in the monetary transmission mechanism and in the economy s volatility we find that by responding more strongly to inflation expectations monetary policy has stabilized the economy more effectively in the post 1980 period

from inflation to more inflation disinflation and low inflation volume 2 of a history of the federal reserve forthcoming covers the years of inflation and disinflation followed by a return to relatively low inflation it addresses four questions why did inflation start why did it continue for 15 or more years from 1965 to about 1982 why did it end why did it not return as we look back to the 1950s and 1960s two of the many changes in the federal reserve system affecting inflation deserve comment first in the 1950s the goal was price stability and zero reported inflation not inflation of about 2 percent the 1959 1960 disinflation brought reported consumer price index cpi inflation measured as a 12 month moving average to less than 1 percent from march through august 1959 this measure again was below 1 percent through most of 1961 and it did not reach 2 percent until early 1966 properly measured and adjusted for biases in the price index the true price level probably declined modestly during this period this period of deflation was also a period of sustained economic growth it and several periods of deflation discussed in volume 1 of a history of the federal reserve 2003 show no evidence of the liquidity trap that absorbed much recent attention in the united states and japan a second major change is the role of economists and economic research at the federal reserve board and in the federal reserve banks in the 1950s the board had no economists as members and there were few economists as

integrated management of inventory and production systems based on floating decoupling point and real time information a simulation based analysis abstract globalisation has transformed market conditions reducing lead times and increasing both the degree of product differentiation and price competition to cope with this issue new hybrid order fulfilment strategies have emerged which integrate the make to stock mts and build to order bto strategies and whose aim is to simultaneously improve opposite objectives such as the stock level and the lead time furthermore companies face frequent challenges of sharing updated information and avoiding the lack of coordination between the different company subsystems this work focuses on relatively recent fulfilment strategies based on the floating decoupling point fdp which uses real time information to operate the main objectives of this work are the study of the influence of different sources of real time information about the available products and select the most suitable configuration of these systems regarding the inventory control policy and the source of real time information the stochastic nature of the process makes simulation an appropriate tool to achieve valuable results the simulation studies have been carried out following a full factorial design of experiments doe experimental results show that the strategies based on the fdp are very sensitive to the real time information these systems achieve the best performance when the inventory control policy uses simultaneously demand forecasting and real time information of available products corresponding to the work in process wip and finished goods inventory fgi in contrast system performance deteriorates significantly when real time information of available products in the wip has not been taken into account

monetary regime switches and central bank preferences monetary policy objectives and targets are not necessarily constant over time the regime switching literature has typically analyzed and interpreted changes in policymakers behavior through simple interest rate rules this paper analyzes policy regime switches by explicitly modeling policymakers behavior and objectives we show that changes in the parameters of simple rules do not necessarily correspond to changes in policymakers preferences in fact capturing and interpreting regime changes in preferences through interest rate rules can lead to misleading results

recurrent hyperinflations and learning we use a model of boundedly rational learning to account for the observations of recurrent hyperinflations in the 1980 s in a standard monetary model we replace the assumption of full rational expectations by a formal definition of quasi rational learning the model under learning matches some crucial stylized facts observed during the recurrent hyperinflations experienced by several countries in the 1980 s remarkably well we argue that despite being a small departure from rational expectations quasi rational learning does not preclude falsifiability of the model it does not violate reasonable rationality requirements and it can be used for policy evaluation

has u s monetary policy changed evidence from drifting coefficients and real time data despite the large amount of empirical research on monetary policy rules there is surprisingly little consensus on the nature or even the existence of changes in the conduct of u s monetary policy three issues appear central to this disagreement 1 the specific type of changes in the policy coefficients 2 the treatment of heteroskedasticity and 3 the real time nature of the data used this paper addresses these issues in the context of forwardlooking taylor rules with drifting coefficients the estimation is based on real time data and accounts for the presence of heteroskedasticity in the policy shock the findings suggest important but gradual changes in the rule coefficients not adequately captured by the usual split sample estimation in contrast to orphanides 2002 2003 i find that the fed s response to the real time forecast of inflation was weak in the second half of the 1970s perhaps not satisfying taylor s principle as suggested by clarida gali and gertler 2000 however the response to inflation was strong before 1973 and gradually regained strength from the early 1980s onward moreover as in orphanides 2003 the fed s response to real activity fell substantially and lastingly during the 1970s

were there regime switches in u s monetary policy working paper 2004 14 june 2004 abstract a multivariate model identifying monetary policy and allowing for simultaneity and regime switching in coefficients and variances is confronted with u s data since 1959 the best fit is with a model that allows time variation in structural disturbance variances only among models that also allow for changes in equation coefficients the best fit is for a model that allows coefficients to change only in the monetary policy rule that model allows switching among three main regimes and one rarely and briefly occurring regime the three main regimes correspond roughly to periods when most observers believe that monetary policy actually differed and the differences in policy behavior are substantively interesting though statistically ill determined the estimates imply monetary targeting was central in the early 80s but was also important sporadically in the 70s the changes in regime were essential neither to the rise in inflation in the 70s nor to its decline in the 80s jel classification e52 e47 c53 key words counterfactuals lucas critique policy rule monetary targeting simultaneity volatility model comparison i the debate over monetary policy change in an influential paper clarida gali and gertler 2000 cgg presented evidence that us monetary policy changed between the 1970 s and the 1980 s indeed that in the 70 s it was drastically worse they found that the policy rule apparently followed in the 70 s was one that when embedded in most stochastic general equilibrium models would imply non uniqueness of the equilibrium and hence vulnerability of the economy to sunspot fluctuations of arbitrarily large size their estimated policy rule for the later period on the other hand eliminated this indeterminacy these results are a possible explanation of the volatile and rising inflation of the 70 s and of its subsequent decline the cgg analysis has two important weaknesses one is that it fails to account for stochastic volatility us macroeconomic variables and particularly the federal funds rate have gone through periods of tranquility and of agitation with forecast error variances varying greatly from period to period ignoring such variation does not lead to inconsistent estimates of model parameters when the forecasting equations themselves are constant but it strongly biases toward a finding of changed parameters tests of the stability of the forecasting equations the other weakness is that the cgg analysis rests on powerful and implausible identifying assumptions they require that we accept that the response of the monetary authority to expected future inflation and output does not depend on the recent history of inflation money growth or output it is hard to understand why this should be so especially in the 70 s when monetarism was a prominent theme in policy debates congress was requiring reports from the fed of projected time paths of monetary aggregates and financial markets were reacting sensitively to weekly money supply numbers the requirement for existence and uniqueness of equilibrium in dynamic models is that the monetary policy rule show a more than unit response of interest rates to the sum of the logs of all nominal variables that appear on the right hand side of the reaction function if we force a particular measure of expected future inflation to proxy for all the nominal variables that actually appear independently in the reaction function we are bound to get distorted conclusions on the one hand because expected future inflation will be a noisy measure of the full set of nominal influences on policy we might get downward bias in our estimates from the usual errorsin variables effect on the other hand to the extent that expected future inflation like most expected future values shows less variation than current nominal variables we could find a mistaken scaling up of coefficients

why inflation rose and fell policy makers beliefs and u s postwar stabilization policy this paper provides an explanation for the run up of u s inflation in the 1960s and 1970s and the sharp disinflation in the early 1980s which standard macroeconomic models have difficulties in addressing i present a model in which rational policymakers learn about the behavior of the economy in real time and set stabilization policy optimally conditional on their current beliefs the steady state associated with the self confirming equilibrium of the model is characterized by low inflation however prolonged episodes of high inflation ending with rapid disinflations can occur when policymakers underestimate both the natural rate of unemployment and the persistence of inflation in the phillips curve i estimate the model using likelihood methods the estimation results show that the model accounts remarkably well for the evolution of policymakers beliefs stabilization policy and the postwar behavior of inflation and unemployment in the united states

the dynamic effects of neutral and investment specific technology shocks the neoclassical growth model is used to identify the short run effects of neutral technology shocks which affect the production of all goods homogeneously and investment specific shocks which affect only investment goods the real equipment price crucial for identifying the investment shocks experiences an abrupt increase in its average rate of decline in 1982 so the analysis is based on a split sample on the basis of the preferred specification the two technology shocks account for 73 percent of hours and 44 percent of output s business cycle variation before 1982 and 38 percent and 80 percent afterward the shocks also account for more than 40 percent of hours and 58 percent of output s forecast errors over a three to eight year horizon in both samples the majority of these effects are driven by the investment shocks