multiple solution indeterminacies in monetary policy analysis abstract a sizeable fraction of recent research on monetary policy has been concerned with issues relating to analytical indeterminacies i e multiple solutions in rational expectations re models most of the literature features sophisticated re analysis conducted within dynamic models that reflect optimizing behavior by individual agents and incorporate taylor style policy rules a few papers have suggested that some of the particular indeterminacy arguments are misleading or irrelevant for the most part however there has been little dissent from the position that these indeterminacies present a genuine problem for monetary policy makers the purpose of the present paper by contrast is to argue that conclusions based on multiple solution indeterminacy findings are of dubious merit rather generally

sophisticated monetary policies in standard monetary policy approaches interest rate rules often produce indeterminacy a sophisticated policy approach does not sophisticated policies depend on the history of private actions government policies and exogenous events and can differ on and off the equilibrium path they can uniquely implement any desired competitive equilibrium when interest rates are used along the equilibrium path implementation requires regime switching these results are robust to imperfect information our results imply that the taylor principle is neither necessary nor sufficient for unique implementation they also provide a direction for empirical work on monetary policy rules and determinacy

the connection between public transfers and private interfamily transfers abstract this paper investigates the anti poverty effectiveness of public transfers taking private transfer responses into account widespread altruistically motivated private transfers would neutralize the distributional impact of public transfers but exchange motivated transfers can reinforce the effects of public transfers on the distribution of economic well being the common technique for gauging anti poverty effectiveness subtracting public transfers from other income and measuring the poverty rate counterfactual yields results that are close to a more complex procedure that takes private transfer responses into account and some of the empirical findings suggest an exchange rather than altruistic motive for private transfers indicating that the effects of public transfers can be magnified by private behavior this is an exact reversal of the prediction that public transfers merely supplant private ones

determinacy and identification with taylor rules the new keynesian taylor rule theory of inflation determination relies on explosive dynamics by raising interest rates in response to inflation the fed induces ever larger inflation unless inflation jumps to one particular value on each date however economics does not rule out explosive inflation so inflation remains indeterminate attempts to fix this problem assume that the government will choose to blow up the economy if alternative equilibria emerge by following policies we usually consider impossible the taylor rule is not identified without unrealistic assumptions thus taylor rule regressions do not show that the fed moved from passive to active policy in 1980

stable near rational sunspot equilibria abstract we introduce a new class of solutions to nonlinear forward looking models called near rational sunspot equilibria nrse nrse are natural nonlinear extensions of the usual sunspot equilibria associated with the linearized version of the economy and are near rational in that agents use the optimal linear forecasting model when forming expectations generic results for existence and stability under learning are established nrse in indeterminate nonlinear models are found to be stable under learning provided that the corresponding linearized model s minimal state variable solution is e stable nrse are readily computable and our results make it possible to use the standard linear tools to search for stable nrse we illustrate our results using a canonical nonlinear new keynesian model

forming coalitions and the shapley ntu value a simple protocol for coalition formation is presented first an order of the players is randomly chosen then a coalition grows by sequentially incorporating new members in this order the protocol is studied in the context of non transferable utility ntu games in characteristic function form if weighted utility transfers are feasible when everybody cooperates then the expected subgame perfect equilibrium payoff allocation anticipated before any implemented game is the shapley ntu value

monetary policy when interest rates are bounded at zero this paper assesses the importance of the zero lower bound on nominal interest rates for the interest rate channel of monetary policy we simulate several interest rate setting policy rules with ei

leverage and the financial accelerator in a liquidity trap we show that the financial accelerator may be very large in a liquidity trap we study a sticky price model with real estate and a financial friction specified as a collateral constraint expectations can lead the economy to a self fulfilling liquidity trap equilibrium where the lower bound on the nominal interest rate binds we model these equilibria as stochastic sunspots as in the great depression a liquidity trap entails house price depreciation and potentially large output losses higher leverage implies much larger output losses but at the same time rules out the existence of short lived liquidity traps

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

some unpleasant properties of loglinearized solutions when the nominal rate is zero does fiscal policy have large and qualitatively different effects on the economy when the nominal interest rate is zero an emerging consensus in the new keynesian nk literature is that the answer to this question is yes evidence presented here suggests that the nk model s implications for fiscal policy at the zero bound may not be all that different from its implications for policy away from it for a range of empirically relevant parameterizations employment increases when the labor tax rate is cut and the government purchase multiplier is less than 1 05

real implications of the zero bound on nominal interest rates if monetary policy succeeds in keeping average inflation very low nominal interest rates may occasionally be constrained by the zero lower bound the degree to which this constraint has real implications depends on the monetary policy feedback rule and the structure of price setting policy rules that make the price level stationary lead to small real distortions from the zero bound if policy imparts persistence into the inflation rate the real implications of the zero bound are large in the presence of backward looking price setting and small if prices are set to maximize profits

self fulfilling recessions at the zero lower bound abstract we highlight an overlooked source of equilibrium multiplicity in monetary economies subject to a zero bound on nominal interest rates in environments with sufficient endogenous propagation depressed contemporary economic conditions must directly lower expectations of future output and inflation a current recession followed by gradual convergence back to steady state may then be an equilibrium outcome without any exogenous impulse we present this mechanism heuristically in partial equilibrium and in two computed examples of new keynesian economies expansionary fiscal policy makes the recessionary equilibrium more severe at the margin but commitment to a sufficiently large expansion can rule out multiplicity

from great depression to great credit crisis similarities differences and lessons the great depression of the 1930s and the great credit crisis of the 2000s had similar causes but elicited strikingly different policy responses while it remains too early to assess the effectiveness of current policy it is possible to analyse monetary and fiscal responses in the 1930s as a natural experiment or counterfactual capable of shedding light on the impact of current policies we employ vector autoregressions instrumental variables and qualitative evidence for 27 countries in the period 1925 39 the results suggest that monetary and fiscal stimulus was effective that where it did not make a difference it was not tried they shed light on the debate over fiscal multipliers in episodes of financial crisis they are consistent with multipliers at the higher end of those estimated in the recent literature and with the argument that the impact of fiscal stimulus will be greater when banking systems are dysfunctional and monetary policy is constrained by the zero bound miguel almunia agustin benetrix barry eichengreen kevin h o rourke and gisela rua

coalition formation problem for sourcing contract design in supply networks abstract this article studies a coalition formation problem for cooperative replenishment with a single supplier and multiple firms we consider that a vertical cooperation between the supplier and the set of firms is already set using periodic individual contracts and we investigate the profitability of a horizontal cooperation between firms when designing collaborative contracts given the significant savings that can be realized thanks to horizontal collaboration the main interest of the potential collaborating firms is to figure out how the collaborating group should be formed and how stable alliances and coalitions should be generated in this article the two questions are studied in two business situations focusing either on the collaboration opportunities in the ordering or the transportation process in each collaborative situation a decision making approach is applied to assess the expected profitability of each firm and to determine if firms should form coalitions to maximize their profits an exact solution method based on a game theoretic approach is developed called cooperative replenishment algorithm cra which generates core stable coalitions for cost savings regarding all partner standpoints an analytical study of stability conditions regarding the ordering and transportation cost structures were performed to enhance the cra resolution procedure extensive experiments based on realistic instances are provided to validate the performance of the cra proposed in terms of solution stability and convergence the computational results also confirm the potential benefit of horizontal collaboration between firms in terms of profit maximization compared to the stand alone situation

expectations learning and business cycle fluctuations this paper explores an alternative theory based on learning dynamics in the con text of an otherwise standard stochastic growth model we consider an environment in which households and firms have an incomplete model of the macroeconomy knowing only their own objectives constraints and beliefs agents are optimizing have a completely specified belief system but do not know the equilibrium map ping between primitive disturbances the aggregate state of the economy and mar ket clearing prices by extrapolating from historical patterns in observed data they approximate this mapping to forecast variables that are exogenous to their decision problems such as the rental rate of capital and the real wage this belief structure has the property that beliefs affect the true data generating process of the economy which in turn affects belief formation the economy is therefore self referential shifts in beliefs about future returns to labor and capital affect current market clear ing prices which in turn can reinforce beliefs in this environment current prices can become less informative about future economic conditions generating fluctuations in real activity this kind of mechanism driving business cycle fluctuations is found in early writ ings on macroeconomic dynamics for example alfred c pigou 1927 on page 122 writes

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

monetary policy rules based on real time data this paper examines the magnitude of informational problems associated with the implementation and interpretation of simple monetary policy rules using taylor s rule as an example i demonstrate that real time policy recommendations differ considerably from those obtained with ex post revised data further estimated policy reaction functions based on ex post revised data provide misleading descriptions of historical policy and obscure the behavior suggested by information available to the federal reserve in real time these results indicate that reliance on the information actually available to policy makers in real time is essential for the analysis of monetary policy rules

speed limit policies the output gap and optimal monetary policy in a standard new keynesian model a myopic central bank concerned with stabilizing inflation and changes in the output gap will implement a policy under discretion that replicates the optimal timeless perspective precommitment policy by stabilizing output gap changes the central bank imparts inertia into output and inflation that is absent under pure discretion even a fully optimizing i e non myopic central bank operating in a discretionary policy environment achieves better social outcomes if it focuses on inflation and changes in the output gap than are achieved under inflation targeting this abstract was borrowed from another version of this item

inflation determination with taylor rules is new keynesian analysis critically flawed abstract cochrane 2007 has strongly questioned the basic economic logic of current monetary policy analysis arguing that new keynesian nk models imply rational expectations paths with explosive inflation that do not imply explosions in real variables relevant for transversality conditions consequently the usual logic does not rule out solutions with explosive inflation that result does not however justify negative conclusions about nk analysis for a different criterion is logically satisfactory it is that to be plausible a re solution must satisfy the property of least squares learnability adoption of this criterion serves to justify in principle the bulk of current mainstream analysis

modeling cooperation on a class of distribution problems in this paper we study models of cooperation between the nodes of a network that represents a distribution problem the distribution problem we propose arises when over a graph a group of nodes offers certain commodity some other nodes require it and a third group of nodes neither need this material nor offer it but they are strategically relevant to the distribution plan the delivery of one unit of material to a demand node generates a fixed profit and the shipping of the material through the arcs has an associated cost we show that in such a framework cooperation is beneficial for the different parties we prove that the cooperative situation arising from this distribution problem is totally balanced by finding a set of stable allocations in the core of an associated cooperative game in order to overcome certain fairness problems of these solutions we introduce two new solution concepts and study their properties

fiscal policy in an unemployment crisis this paper shows that large scal multipliers arise naturally from equilibrium unemployment dynamics in response to a shock that brings the economy into a liquidity trap an expansion in government spending increases output and causes a fall in the unemployment rate since movements in unemployment are persistent the eects of current spending linger into the future leading to an enduring rise in income as an enduring rise in income boosts private demand even a temporary increase in government spending sets in motion a virtuous employment spending spiral with a large associated multiplier this transmission mechanism contrasts with the conventional view in which scal policy may be ecacious only under a prolonged and committed rise in government spending which engineers a spiral of increasing ination

estimating the personal distribution of income with adjustment for within family variation the 1970 and 1979 current population surveys are used to compute the personal distribution of income the major innovation in this paper is that all individuals in the household are not treated identically in particular children receive a different proportion of income than do adults that proportion is estimated its variations with respect to household characteristics are discussed and a final distribution of personal income is computed that distribution has considerably fatter tails than does the one normally used

optimal monetary policy under commitment with a zero bound on nominal interest rates we determine optimal monetary policy under commitment in a forwardlooking new keynesian model when nominal interest rates are bounded below by zero the lower bound represents an occasionally binding constraint that causes the model and optimal policy to be nonlinear a calibration to the u s economy suggests that policy should reduce nominal interest rates more aggressively than suggested by a model without lower bound rational agents anticipate the possibility of reaching the lower bound in the future and this amplifies the effects of adverse shocks well before the bound is reached while the empirical magnitude of u s mark up shocks seems too small to entail zero nominal interest rates shocks affecting the natural real interest rate plausibly lead to a binding lower bound under optimal policy however this occurs quite infrequently and does not imply positive average inflation rates in equilibrium interestingly the presence of binding real rate shocks alters the policy response to non binding markup shocks

liquidity traps learning and stagnation we examine global economic dynamics under learning in a new keynesian model in which the interest rate rule is subject to the zero lower bound under normal monetary and fiscal policy the intended steady state is locally but not globally stable large pessimistic shocks to expectations can lead to deflationary spirals with falling prices and falling output to avoid this outcome we recommend augmenting normal policies with aggressive monetary and fiscal policy that guarantee a lower bound on inflation in contrast policies geared toward ensuring an output lower bound are insufficient for avoiding deflationary spirals

optimal simple and implementable monetary and fiscal rules welfare maximizing monetary and fiscal policy rules are studied in a model with sticky prices money and distortionary taxation the ramsey optimal policy is used as a point of comparison the main findings are the size of the inflation coefficient in the interest rate rule plays a minor role for welfare it matters only insofar as it affects the determinacy of equilibrium optimal monetary policy features a muted response to output interest rate rules that feature a positive response to output can lead to significant welfare losses the welfare gains from interest rate smoothing are negligible optimal fiscal policy is passive the optimal monetary and fiscal rule combination attains virtually the same level of welfare as the ramsey optimal policy

inflation targeting fiscal rules and the policy mix cross effects and interactions we examine how inflation targeting it and fiscal rules fr affect inflation and fiscal performance in a large panel of countries during 1990 2009 in line with theory both fr and it appear to shape monetary and fiscal outcomes significant cross effects seem to exist as it strengthens fiscal performance whereas the combination of fr and it tends to be associated with more disciplined macroeconomic policies than if only one of these institutions operates our findings suggest that it and fr affect the coordination of the policy mix and point to potential benefits of reforming macroeconomic frameworks in a holistic fashion

sharing within families implications for the measurement of poverty among individuals in canada one major objection to neoclassical economic theory raised by feminist economists is that traditional theory neglects what goes on within families this paper examines the policy relevance of this feminist critique by asking whether our understanding of the poverty experiences of individual canadians is significantly affected by the assumptions we make about how financial resources are shared within families using microdata from the 1982 1986 and 1992 family expenditure surveys the authors simulate the consequences of alternative sharing rules from equal sharing to minimal sharing their conclusion is that it matters a great deal what we assume about how financial resources are shared within families

five facts about prices a reevaluation of menu cost models are price decreases 3 the frequency of price increases covaries strongly with inflation whereas the frequency of price decreases and the size of price increases and price decreases do not 4 the frequency of price change is highly seasonal it is highest in the first quarter and then declines 5 we find no evidence of upwardsloping hazard functions of price changes for individual products we show that the first second and third facts are consistent with a benchmark menu cost model whereas the fourth and fifth facts are not

fiscal policy in an expectations driven liquidity trap we study the effects of fiscal policy interventions in a liquidity trap in a model with nominal rigidities and an interest rate rule in a liquidity trap caused by a self fulfilling state of low confidence higher government spending has deflationary effects that reduce the spending multiplier when the zero lower bound is binding instead cuts in marginal labor tax rates are inflationary and become more expansionary when the zero lower bound is binding these findings contradict popular views about the effects of fiscal policy in a liquidity trap

population monotonic allocation schemes for cooperative games with transferable utility abstract an allocation scheme for a cooperative game specifies how to allocate the worth of every coalition it is population monotonic if each player s payoff increases as the coalition to which he belongs grows larger we show that essentially a game has a population monotonic allocation scheme pmas if and only if it is a positive linear combination of monotonic simple games with veto control a dual characterization is also provided sufficient conditions for the existence of a pmas include convexity and increasing average marginal contributions if the game is convex its extended shapley value is a pmas classification number 026

an empirical study on coalition formation and cost savings allocation abstract interest has been raised by the recent identification of potential savings through collaborative planning in logistics operations even though substantial savings can be realized two key questions exist i how should potential savings be divided among a group of collaborating companies and ii among potential collaborating companies how should collaborating group s be formed these two questions are studied in a specific context among potential collaborating companies a subset denoted the leading companies performs collaborative planning on behalf of the others and together they initiate formation of a collaborating group we use the concept of a business model to detail such context based on the literature on network formation where potential savings are modelled by a cooperative game four business models are explored in four different subsets of leading companies we propose a network model as a method to determine the stable collaborating group in each computation a case study including eight forest companies is described and analyzed results show that very different solution characteristics can be achieved depending on the business model selected

game theory and cost allocation problems problems of allocating joint costs in a reasonable way arise in many practical situations where people decide to work together to save costs cost allocation methods based on game theoretical concepts take into account the strategic aspects of cost allocation situations we give a survey of cost allocation methods based on the nucleolus and the shapley value and introduce also a new one the so called cost gap allocation method which is based on the i value it is shown that for some large subclasses of cost allocation problems this new cost allocation method coincides with old separable cost methods proposed in the thirties by the tennessee valley authority and also with the separable costs remaining benefits scrb method properties of this cost gap allocation method are also treated

unconventional fiscal policy at the zero bound when the zero lower bound on nominal interest rates binds monetary policy cannot provide appropriate stimulus we show that in the standard new keynesian model tax policy can deliver such stimulus at no cost and in a time consistent manner there is no need to use inecient policies such as

the perils of taylor rules abstract since john taylor s 1993 carnegie rochester conf ser publ policy39 195 214 seminal paper a large literature has argued that active interest rate feedback rules that is rules that respond to increases in inflation with a more than one for one increase in the nominal interest rate are stabilizing in this paper we argue that once the zero bound on nominal interest rates is taken into account active interest rate feedback rules can easily lead to unexpected consequences specifically we show that even if the steady state at which monetary policy is active is locally the unique equilibrium typically there exist an infinite number of equilibrium trajectories originating arbitrarily close to that steady state that converge to a liquidity trap that is a steady state in which the nominal interest rate is near zero and inflation is possibly negative journal of economic literature classification numbers e52 e31 e63

determining optimal monetary speed limits abstract the proposal by walsh 2003 that policy should include a speed limit by having the change in the output gap as an additional term in a taylor type rule is shown to be exactly optimal given an appropriate parameterization

rethinking the role of fiscal policy as recently as two years ago there was a widespread consensus among economists that fiscal policy is not useful as a countercyclical instrument now governments in washington and around the world are developing massive fiscal stimulus packages supported by a wide range of economists in universities governments and businesses why has this change occurred what are the principles for designing a potentially useful fiscal stimulus and what will happen if the current fiscal stimulus fails this abstract was borrowed from another version of this item

escaping from a liquidity trap and deflation the foolproof way and others existing proposals to escape from a liquidity trap and deflation including my foolproof way are discussed in the light of the optimal way to escape the optimal way involves three elements 1 an explicit central bank commitment to a higher future price level 2 a concrete action that demonstrates the central bank s commitment induces expectations of a higher future price level and jump starts the economy and 3 an exit strategy that specifies when and how to get back to normal a currency depreciation is a direct consequence of expectations of a higher future price level and hence an excellent indicator of those expectations furthermore an intentional currency depreciation and a crawling peg as in the foolproof way can implement the optimal way and in particular induce the desired expectations of a higher future price level i conclude that the foolproof way is likely to work well for japan which is in a liquidity trap now as well as for the euro area and the united states in case either would fall into a liquidity trap in the future

cash or condition evidence from a cash transfer experiment this brief summarizes the results of a gender impact evaluation study entitled cash or condition evidence from a cash transfer experiment conducted from 2008 to the end of 2009 in malawi the study observed the impact of conditionality in cash transfer programs with two distinct interventions unconditional transfers uct arm and transfers conditional on school attendance cct arm targeted at adolescent girls in malawi on individual level dropout rates declined in both treatment arms however the uct arm is 43 percent as large as the cct arm the fraction of days attended in the cct arm is significantly higher than the uct cognitive ability math and english scores significantly improve for the cct but not for the uct probability of pregnancy and marriage were much lower in the uct arm the delays in marriage and fertility in the uct arm are found entirely among adolescent girls who dropped out of school after the start of the intervention improvements in human capital for the recipients of the cct are achieved at the cost of worse outcomes for people who drop out of school funding for the study derived from the global development network bill and melinda gates foundation national bureau of economic research nber africa project world bank research support budget grant world bank knowledge for change trust fund world development report 2007 small grants fund spanish impact evaluation fund and gender action plan trust fund

the perils of nominal targets a monetary authority can be committed to pursuing an inflation price level or nominal gdp target yet systematically fail to achieve the prescribed goal constrained by the zero lower bound on the policy rate the monetary authority is unable to implement its objectives when private sector expectations stray far enough from the target low inflation expectations become self fulfilling resulting in an additional markov equilibrium in which the monetary authority falls short of the nominal target average output is below its efficient level and the policy rate is typically low introducing a stabilization goal for long term nominal rates can implement a unique markov equilibrium without fully compromising stabilization policy

is there a fiscal free lunch in a liquidity trap this paper uses a dsge model to examine the eects of an expansion in government spending in a liquidity trap the spending multiplier can be much larger than in the normal situation if the liquidity trap is very persistent and scal stimulus can be rapidly implemented moreover the budgetary costs may be minimal as the large response of output boosts tax revenues allowing for something close to a scal free lunch however we caution that the multiplier may be much smaller under plausible implementation lags for many types of public spending and or if the liquidity trap lasts less than two years in addition because the marginal impact of scal expansion decreases in the scale of the outlay it is crucial to distinguish between average and marginal multipliers

learning to live in a liquidity trap abstract the taylor rule in combination with the zero lower bound on nominal rates has been shown to create an unintended liquidity trap equilibrium the relevance of this equilibrium has been challenged on the basis that it is not stable under least square learning in this paper we show that the liquidity trap equilibrium is stable under social learning the learning mechanism we employ includes three realistic elements mutation crossover and tournaments we show that agents can learn to have pessimistic sentiments about the central bank s ability to generate price growth giving rise to a stochastically stable environment characterized by deflation and stagnation this article is part of a special issue entitled fiscal and monetary policies

supply chain coordination perspectives empirical studies and research directions supply chains sc are generally complex and are characterized by numerous activities spread over multiple functions and organizations which pose interesting challenges for effective sc coordination to meet these challenges sc members must work towards a unified system and coordinate with each other a systematic literature review is presented in this paper to throw light on the importance of sc coordination the objectives of this paper are to report and review various perspectives on sc coordination issues understand and appreciate various mechanisms available for coordination and identify the gaps existing in the literature a framework is suggested indicating scope for further research

are negative supply shocks expansionary at the zero lower bound the standard new keynesian model predicts that economies behave differently at the zero lower bound completely wasteful government spending or forward guidance is very stimulative and capital des

time series growth in the female labor force in this paper we investigate the reasons for the growth in the female labor force in america during the twentieth century in our research we study the longer term trends since 1900 and conduct a more intensive examination of developments after the second world war on the basis of our work we conclude that rising real wages accounted for 60 of the total growth in the female labor force half of this wage effect in expanding labor supply was the fertility reducing consequence of a higher female wage

new keynesian versus old keynesian government spending multipliers renewed interest in fiscal policy has increased the use of quantitative models to evaluate policy because of modelling uncertainty it is essential that policy evaluations be robust to alternative assumptions we find that models currently being used in practice to evaluate fiscal policy stimulus proposals are not robust government spending multipliers in an alternative empirically estimated and widely cited new keynesian model are much smaller than in these old keynesian models the estimated stimulus is extremely small with gdp and employment effects only one sixth as large and with private sector employment impacts likely to be even smaller we investigate the sensitivity of our findings with regard to the response of monetary policy the zero bound on nominal interest rates and the inclusion of an empirically relevant degree of rule of thumb behaviour in the new keynesian model in addition we relate our findings using estimated structural macroeconomic models to the recent literature using reduced form regression techniques