fiscal policy interventions at the zero lower bound we build on a new keynesian dynamic stochastic general equilibrium dsge model to explore the macroeconomic consequences of fiscal expansionary shocks during the economic crisis of 2008 in the eurozone in this setting we find that the big four eurozone economies france germany italy and spain can effectively escape from their liquidity trap through fiscal policy interventions caused by government purchases we estimate the government spending multiplier to be above 1 8 when this policy is associated with a long term commitment to keeping the nominal interest rate at the zero lower bound as suggested by krugman 1998 notably the short term deficit effect on the budget balance can be offset five years after the implementation of a large spending program we also show that alternative policies with tax cuts that expand the supply do not appear to have the same power in the short run moreover we provide novel empirical evidence that a large government debt renders a government spending policy ineffective

eductive stability in real business cycle models we reexamine issues of coordination in the standard rbc model is the unique rational expectations equilibrium attainable by rational agents who contemplate the possibility of small deviations from equilibrium surprisingly we nd that coordination cannot be expected even with strong common knowledge assumptions rational agents anticipating small but persistent deviations are led to take actions that eventually contradict the common knowledge assumption this impossibility theorem for eductive learning is not fully overcome when adaptive learning is incorporated into the framework

policy change and learning in the rbc model what is the impact of surprise and anticipated policy changes when agents form expectations using adaptive learning rather than rational expectations we examine this issue using the standard stochastic real business cycle model with lump sum taxes agents combine knowledge about future policy with econometric forecasts of future wages and interest rates dynamics under learning can have large impact effects and a gradual hump shaped response and tend to be prominently characterized by oscillations not present under rational expectations these fluctuations reflect periods of excessive optimism or pessimism followed by subsequent corrections

increasing returns capital utilization and the effects of government spending abstract we show that a one sector real business cycle model with mild increasing returns to scale variable capital utilization and saddle path stability is able to produce qualitatively realistic business cycles driven solely by disturbances to government purchases due to an endogenous increase in labor productivity a positive spending shock can lead to simultaneous increases in output consumption investment employment and real wage our analysis illustrates a close relationship between this result and the recent literature that explores indeterminacy and sunspots in real business cycle models under laissez faire in particular the condition which governs the required magnitude of increasing returns for government spending shocks to generate procyclical macroeconomic effects is identical to that necessary for a laissez faire one sector real business cycle model to exhibit local indeterminacy

capital accumulation games of infinite duration abstract consider a market in which firms accumulate capital according to the nerlove arrow capital accumulation equation each player chooses a path of investment and thus an induced path of capital to maximize his total discounted profits which depend on his own capital and the capital stocks of his rivals existence is proved for such a nonzero sum infinite horizon differential game and conditions under which the game converges to a particular stationary point regardless of the initial conditions are shown thus the game possesses the property of conditional global asymptotic stability

real government size automatic feedback rules and the measured effectiveness of fiscal policy this paper argues that as intervention fiscal policy means more than simply any change in government spending and this requires of fiscal analysis a measure that separates the allocative from the counter cyclical activities of government defining intervention as an optimal policy rule that responds automatically to privately unanticipated variations in output a general equilibrium model is built to separate the supply side effects of desired changes in the size of government from demand side interventions designed to stimulate aggregate demand the model is tested using the results of a public choice investigation of the real size of government ferris and west 1996 that exercise produces a measure of desired size and through its residual an implicit measure of intervention the paper tests the prediction that increases in desired size increase aggregate supply and that ex post measures of fiscal intervention can be recovered and tested for their effect on aggregate output the test uses citibase

electoral uncertainty fiscal policy and macroeconomic fluctuations abstract in this paper we study the link between elections fiscal policy and aggregate fluctuations the setup is a stylized dynamic stochastic general equilibrium model incorporating both technology and political re election shocks the latter are incorporated via a two party model with elections the main theoretical prediction is that forward looking incumbents with uncertain prospects of re election find it optimal to follow relatively shortsighted fiscal policies and that this hurts capital accumulation our econometric estimation using u s data finds a statistically significant link between electoral uncertainty and policy instruments and in turn macroeconomic outcomes

endogenous markups and the effects of income taxation theory and evidence from oecd countries abstract existing studies on the effects of fiscal policy under imperfect competition typically treat each firm s price cost markup as fixed this paper examines the implications of endogenising the markup in a simple model of income taxation under monopolistic competition it is demonstrated that an increase in income tax reduces the number of firms lessens competition among surviving firms and raises the optimal markups in the new steady state through this channel the effects of income taxation on the key macroeconomic variables as well as on consumer welfare are unambiguously enlarged the simple model prediction is largely supported by cross section regressions with data from oecd countries

does neoclassical theory account for the effects of big fiscal shocks evidence from world war ii much debate surrounds the usefulness of the neoclassical growth model for assessing the macroeconomic impact of fiscal shocks we test the theory using data from world war ii which is by far the largest fiscal shock in the history of the united states we take observed changes in fiscal policy during the war as inputs into a parameterized dynamic general equilibrium model and compare the values of all variables in the model to the actual values of these variables in the data our main finding is that the theory quantitatively accounts for macroeconomic activity during this big fiscal shock

business cycles with distorting taxes and disaggregated capital markets abstract this paper studies a neoclassical growth model to examine the linkages between distorting corporate and personal taxes and cyclical movements of aggregates such as investments in equipment and structures suppose tax variables vary stochastically and annually we solve quarterly individual and aggregate decision rules by recursive methods and quantify the dynamic impacts on aggregates from unit changes in tax structures and individual and joint tax specifications the findings suggest that corporate income tax is the major factor leading to substantial tax effects on business cycles moreover the impact of investment tax credit for equipment on disaggregated investments is equally significant

expectation shocks and learning as drivers of the business cycle psychological factors market sentiments and less than fully rational shifts in beliefs are widely believed to play a role in the economy yet they are rarely considered in macroeconomic models this paper evaluates the empirical role of expectational shocks on business cycle fluctuations the paper relaxes the rational expectations assumption to exploit survey data on expectations in the estimation of a new keynesian model which allows for learning by economic agents expectation shocks affect the formation of expectations and capture waves of optimism and pessimism that lead agents to form forecasts that deviate from those implied by their learning model the empirical results uncover a crucial role for these novel expectations shocks as a major driving force of the u s business cycle expectation shocks regarding future real activity are the main source of economic fluctuations accounting for roughly half of business cycle fluctuations

tales of fiscal adjustment fiscal adjustments why they can be expansionary this paper examines the evidence on fiscal adjustments in oecd countries from the early 1960s to today the results shed light on the recently observed phenomenon of fiscal tightening that produces non keynesian expansionary effects one interpretation is that a serious fiscal tightening increases demand wealth rises when future tax burdens decline and when interest rates decline credibility is restored and inflation or default risks abate both consumption and investment rise for this effect to produce an expansion the tightening must be sizeable and occur after a period of stress when the budget is quickly deteriorating and public debt is building up another interpretation emphasizes the supply side typically a fiscal consolidation based on tax increases is short lived to be long lasting it must include cuts in public employment transfers and government wages to be politically possible such a policy must be supported by trade unions these measures result in more efficient labour markets and boost the supply side based both on statistical evidence and on a detailed analysis of ten cases of major fiscal adjustment this article provides cautious support to the supply side view without denying a more limited role for the demand side channel alberto alesina and silvia ardagna

can fiscal spending stimulate private consumption abstract empirically government expenditure shocks seem to crowd in private consumption while neoclassical and new keynesian models predict crowding out we derive conditions under which a government in utility specification in a sticky price model helps to reconcile theory and evidence

markets with heterogeneous beliefs a necessary and sufficient condition for a trader to vanish what does it take to survive in the market previous literature has proposed sufficient conditions for a trader to vanish which depend on pairwise comparisons of traders discounted beliefs we propose a novel condition that focuses on the ratio of traders discounted beliefs and approximate equilibrium prices unlike existing conditions ours is both necessary and sufficient for a trader to vanish and delivers the exact rate at which vanishing traders lose their consumption shares as an application we analyze the performance of two intuitive behavioral strategies the follow the leader strategy that prescribes mimicking the beliefs of the most successful trader and the follow the market strategy that prescribes to use beliefs which coincide with the state price density further we show that the relative performance of vanishing traders cannot be studied in isolation our analysis highlights an intuitive point obscured by the existing conditions trading in financial markets is qualitatively different from bilateral trading

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

trend reverting fluctuations in the life cycle model abstract aggregate time series provide evidence of short term dynamic adjustment that appears to be governed by complex or negative real eigenvalues this finding is at odds with the predictions of reasonably parameterized convex one sector growth models with complete markets we study life cycle economies in which aggregate saving depends non trivially on the distribution of wealth among cohorts if consumption goods are weak gross substitutes near the steady state price vector we prove that the unique equilibrium of a life cycle exchange economy converges to the unique non monetary steady state via damped oscillations we also discuss examples and extensions

determinants of the current account balance in the united states this article studies the role of public and private imbalances in the behaviour of the current account balance in the united states in the context of an intertemporal model the estimation evaluates the effects of public and private imbalances on the dynamics of the current account correlation coefficients support the ricardian equivalence higher budget deficit correlates with a reduction in private consumption and an increase in private savings government saving does not vary significantly with macroeconomic variables in the short or in the long run in contrast fluctuations in government investment vary significantly with a number of economic variables in the long and in the short run accordingly fluctuations in the budget deficit are likely to be driven by fluctuations in public investment in contrast to government savings private savings vary significantly with macro variables in the long and in the short run fluctuations in private investment appear less evident compared to that in privat

great expectations and the end of the depression what ended the great depression in the united states this paper suggests that the recovery was driven by a shift in expectations this shift was triggered by president franklin delano roosevelt s fdr policy actions on the monetary policy side roosevelt abolished the gold standard and announced an explicit policy objective of inflating the price level to pre depression levels on the fiscal policy side roosevelt expanded real and deficit spending which helped make his policy objective credible the key to the recovery was the successful management of expecta tions about future policy roosevelt s rise to power is modeled as a policy regime change as in thomas sargent 1983 and peter temin and barry wigmore 1990 this paper formalizes temin and wigmore s argu ment in a repeated game setting using a dynamic stochastic general equilibrium dsge model and argues that the regime change can account for the recovery in the model a regime change means the elimination of certain policy dogmas that constrain the actions of the government the regime change generates an endogenous shift in expectations due to a coordination of mon etary and fiscal policy this coordination ended the great depression by engineering a shift in expectations from contractionary i e the private sector expected future economic contrac tion and deflation to expansionary i e the public expected future economic expansion and inflation the expectation of higher future inflation lowered real interest rates thus stimulating demand while the expectation of higher future income stimulated demand by raising permanent income

the dominant borrower syndrome abstractthe financing channel of a fiscal stimulus matters for the size and the sign of the fiscal multiplier we develop a general equilibrium model where a fiscal stimulus is partially bank funded and the government becomes the dominant borrower from banks relative to entrepreneurs this leads to a negative impact on credit spreads investment and a contraction in output we support our story with a structural vector autoregression for a sample of developing countries featuring the dominant borrower syndrome

how misleading is linearization evaluating the dynamics of the neoclassical growth model this paper investigates the reliability of employing linearization to evaluate the dynamic adjustments to changes in productive government spending in a ramsey growth model if government expenditure is introduced as a flow and the dynamic adjustment is fast linearization may yield a reasonably good approximation to the true dynamics even for fairly large policy shocks if government expenditure assumes the form of a stock leading to more sluggish adjustment linearization may yield misleading predictions these errors occur at the beginning of the transition and weigh heavily in welfare calculations the implications for temporary shocks and the speed of convergence are also considered

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

activist fiscal policy during and after the great recession that began in december 2007 the u s federal government enacted several rounds of activist fiscal policy in this paper we review the recent evolution of thinking and evidence regarding the effectiveness of activist fiscal policy although fiscal interventions aimed at stimulating and stabilizing the economy have returned to common use their efficacy remains controversial we review the debate about the traditional types of fiscal policy interventions such as broad based tax cuts and spending increases as well as more targeted policies while there have been improvements in estimates of the effects of broad based policies much of what has been learned recently concerns how such multipliers might vary with respect to economic conditions such as the credit market disruptions and very low interest rates that were central features of the great recession the eclectic and innovative interventions by the federal reserve and other central banks during this period highlight the imprecise divisions between monetary and fiscal policy and the many channels through which fiscal policies can be implemented

monetary fiscal policy interactions and fiscal stimulus abstract increases in government spending trigger substitution effects both inter and intra temporal and a wealth effect the ultimate impacts on the economy hinge on current and expected monetary and fiscal policy behavior studies that impose active monetary policy and passive fiscal policy typically find that government consumption crowds out private consumption higher future taxes create a strong negative wealth effect while the active monetary response increases the real interest rate this paper estimates markov switching policy rules for the united states and finds that monetary and fiscal policies fluctuate between active and passive behavior when the estimated joint policy process is imposed on a conventional new keynesian model government spending generates positive consumption multipliers in some policy regimes and in simulated data in which all policy regimes are realized the paper reports the model s predictions of the macroeconomic impacts of the american recovery and reinvestment act s implied path for government spending under alternative monetary fiscal policy combinations

liquidity constraints and the substitutability between private and government consumption the role of military and non military spending i introduction using data for a number of economies we investigate i the relationship between private consumption and two types of government spending military and non military and ii the severity of liquidity constraints because of their importance for macroeconomic modeling in theory and practice 1 both issues have been the subjects of considerable theoretical and empirical investigation on the issue of liquidity constraints the most influential research has relied on hall s 1978 euler equation approach to the permanent income hypothesis in an attempt to reconcile hall s and flavin s 1981 methodologies hayashi 1982 modified hall s martingale result to allow for the possibility that a subset of consumers are liquidity constrained and showed that liquidity constraints can result in consumption s excess sensitivity to current income campbell and mankiw 1989 1990 1991 and jappelli and pagano 1989 have applied hayashi s methodology using data from the u s and several other oecd countries on the substitutability issue aschauer 1985 has modified hall s euler equation to allow for substitutability between government spending and private consumption and found that the two are substitutes for the u s karras 1994 however using a similar approach and data for 30 countries concludes that private and government consumption are better described as complementary or unrelated liquidity constraints and substitutability have been combined in studies by graham and himarios 1991 cushing 1992 and graham 1993 using u s data and by evans and karras 1996 for a number of countries a crucial limitation of most of these studies is the use of aggregate government consumption data which counterintuitively imposes a common substitutability parameter on all components of government spending 2 using recently available time series data for a large number of countries the present paper relaxes this restriction by decomposing government consumption into military and non military components enabling us to separately identify their relationship to private consumption the allocation of government consumption between military and non military functions has varied greatly across countries the appendix reports the average size of military and non military government shares in gdp as well as the military non military ratio by country over the 1970 1989 period average military expenditure as a fraction of gdp for example has ranged in our sample from 0 11 in mexico to 12 30 in jordan similarly the fraction of government consumption absorbed by military expenditure has ranged from 1 09 in mauritius to 66 82 in poland this sizable variability is promising in terms of cross sectional identification power but it also suggests that the estimated parameters must not be assumed to be common across countries the estimated model is derived in section ii which combines liquidity constraints and substitutability by nesting the approaches of hayashi 1982 and aschauer 1985 in the same section we discuss data sources and the estimation strategy which permits the estimated parameters to vary by country in a way that helps determine how they are influenced by country specific factors section iii estimates the model for a panel of the 66 countries for which annual data on all series are available for the 1970 1989 period the paper s main conclusions are given in section iv ii methodology and data we assume that consumers in economy i at time t derive utility from effective consumption c sup which we define as 1 mathematical expression omitted where c is private consumption g sup m and g sup nm are the military and non military components of government consumption the parameters theta sup m and theta sup nm measure the degree of substitutability between c and g sup m and c and g sup nm respectively

when can changes in expectations cause business cycle fluctuations in neo classical settings abstract it is often argued that changes in expectation are an important driving force of the business cycle however it is well known that changes in expectations cannot generate positive co movement between consumption investment and employment in the most standard neo classical business cycle models this gives rise to the question of whether changes in expectation can cause business cycle fluctuations in any neo classical setting or whether such a phenomenon is inherently related to market imperfections this paper offers a systematic exploration of this issue our finding is that expectation driven business cycle fluctuations can arise in neo classical models when one allows for a sufficiently rich description of the production technology however such a structure is rarely allowed or explored in macro models in particular we identify a multi sector setting and a setting with a costly distribution system in which expectation driven business cycles can arise

quantifying tax effects under policy foresight abstract studies of tax effects make the conventional information assumption that changes in period t taxes become known at t legislative lags however imply that news arrives before tax changes take place under policy foreknowledge the conventional information structure is therefore misspecified simulations of a standard neoclassical growth model suggest that foresight of only one quarter can distort substantially the estimates of tax effects obtained under the no foresight assumption also it is crucial to model capital and labor taxes separately anticipated changes in these two tax policies have opposite effects on consumption investment labor and output before policy realization

escaping nash inflation an ordinary differential equation ode gives the mean dynamics that govern the convergence to self confirming equilibria of self referential systems under discounted least squares learning another ode governs escape dynamics that recurrently propel away from a self confirming equilibrium in a model with a unique self confirming equilibrium the escape dynamics make the government discover too strong a version of the natural rate hypothesis the escape route dynamics cause recurrent outcomes close to the ramsey commitment inflation rate in a model with an adaptive government

macroeconomies as constructively rational games real world decision makers are forced to be locally constructive that is their decisions are necessarily constrained by their interaction networks information beliefs and physical states this study transforms an otherwise standard dynamic macroeconomic model into an open ended dynamic game by requiring consumers and firms with intertemporal utility and profit objectives to be locally constructive tested locally constructive decision processes for the consumers and firms range from simple reactive reinforcement learning to adaptive dynamic programming adp computational experiments are used to explore macroeconomic performance under alternative decision process combinations relative to a social planner benchmark solution a key finding is that simpler decision processes can outperform more sophisticated decision processes such as adp however memory length permitting some degree of adaptive foresight is critical for good performance

further turnpike properties for general capital accumulation games abstract we consider a class of finite and infinite horizon discrete time n player capital accumulation games three turnpike results for the case of open loop nash equilibrium solutions are derived under fairly weak conditions

adaptive learning forecast based instrument rules and monetary policy abstract this paper argues that recently popular forecast based instrument rules for monetary policy may fail to stabilize economic fluctuations in a new keynesian model of output gap and inflation determination in which private agents face multi period decision problems but have non rational expectations and learn over time if the monetary authority adopts a forecast based instrument rule and responds to observed private forecasts then this class of policies frequently induce divergent learning dynamics a central bank that correctly understands private behavior can mitigate such instability by responding to the determinants of private forecasts this suggests gathering information on the determinants of expectations to be useful

future fiscal and budgetary shocks abstract we study the effects of future tax and budgetary shocks in a non monetary and possibly non ricardian economy an unanticipated temporary labor tax cut to be effective on a given future date a delayed debt bomb causes at once a drop in the unit value placed on the firms business asset the customer with the result that share prices the hourly wage and employment drop in tandem this paradox of reduced activity through announcement of future stimulus does not hinge on an upward jump of long interest rates a future tax rate cut lacking a sunset provision has the same negative effects

government spending entry and the consumption crowding in puzzle this article documents empirically that net firm entry robustly rises after a u s government spending expansion we use this new finding to test the empirical validity of various model features that have been proposed to generate consumption crowding in after positive expenditure shocks endogenous entry models typically fail to generate the observed joint increase in consumption and entry model features that dampen the wealth effect such as rule of thumb households or complementarity between labor and consumption in preferences tend to reduce entry we show that utility or productivity enhancing public spending can reconcile the model with our documented fact and performs well empirically

imperfect mobility of labor across sectors and fiscal transmission abstract our paper investigates the sectoral effects of government spending shocks and highlights the role of labor mobility our var evidence for sixteen oecd countries reveals that a shock to government consumption by 1 of gdp increases non traded value added by 0 7 of gdp and generates a decline in traded value added the value added share of non tradables rises by 0 35 of gdp thus implying that the reallocation of resources accounts for 50 of the sectoral fiscal multiplier consistently our estimates show that the non traded sector is highly intensive in the government spending shock and experiences a labor inflow the shift of hours worked toward the non traded sector is however subject to mobility costs which vary across countries when we explore quantitatively the sectoral effects of a shock to government consumption that is highly intensive in non traded goods we find that the model can replicate the magnitude of the rise in the share of non tradables we document empirically once we allow for both labor mobility and capital installation costs financial openness also matters as it further biases the demand shock toward non tradables to account for the cross country dispersion in the responses of sectoral shares we estimate empirically we have to let the degree of labor mobility vary across countries

anticipation learning and welfare the case of distortionary taxation we study the impact of anticipated fiscal policy changes in the ramsey economy when agents form expectations using adaptive learning we extend the existing framework by distortionary taxes as well as elastic labour supply which makes agents decisions non predetermined but more realistic we detect that the dynamic responses to anticipated tax changes under learning have oscillatory behaviour moreover we demonstrate that this behaviour can have important implications for the welfare consequences of fiscal reforms

the output employment and interest rate effects of government consumption abstract we study the impact on aggregate variables of changes in government consumption using the neoclassical stochastic growth model we show theoretically that the impact on output and employment of a persistent change in government consumption exceeds that of a temporary change we also show that in principle there can be an analog to the keynesian multiplier in the neoclassical growth model finally in an empirically plausible version of the model we show that the interest rate impact of a persistent government consumption shock exceeds that of a temporary one our results provide counterexamples to existing claims in the literature

learning about fiscal policy and the effects of policy uncertainty abstract in this paper we ask how uncertainty about fiscal policy affects the impact of fiscal policy changes on the economy when the government tries to counteract a deep recession the agents in our model are uncertain about the conduct of fiscal policy and act as econometricians by estimating fiscal policy rules that might change over time we find that assuming that agents are not instantaneously aware of the new fiscal policy regime in place leads to substantially more volatility in the short run and persistent differences in average outcomes we highlight issues that can arise when a policymaker wants to announce a policy change from a methodological perspective we introduce a novel way to model learning in the face of discrete policy changes

anticipated disinflation and recession in the new keynesian model under learning abstract in the new keynesian model under rational expectations a disinflation announced in advance causes an expansion this anomaly is robust to the assumption that monetary policy follows a taylor rule i show that under adaptive learning an anticipated disinflation causes a recession thus learning offers a resolution to the disinflationary booms anomaly

escaping volatile inflation why has inflation been so stable in developed economies since the early 1990s in this paper we answer that the united states and other countries may have escaped from a volatile inflation equilibrium our argument builds on the story proposed by tom sargent in the conquest of american inflation where the fall in inflation in the 1980s was attributed to changing government beliefs to explain the escape in inflation volatility we unwind one of sargent s simplifications and allow the government to react to some of the shocks in the economy in this case when government beliefs turned against the phillips curve in the 1980s they not only led to an escape from high inflation but also stopped government using changes in inflation to offset shocks inflation and inflation volatility therefore escaped in tandem our analysis also sheds some light on why the escape in inflation occurred at the time it did

fiscal consolidations and heterogeneous expectations abstract we analyze fiscal consolidations using a new keynesian model where agents have heterogeneous expectations and are uncertain about the composition of consolidations we look at spending based and tax based consolidations and analyze their effects separately we find that the effects of consolidations and the output multipliers are sensitive to heterogeneity in expectations before and after implementation of a specific fiscal plan depending on the beliefs about the type of consolidation prior to implementation we show that heterogeneity in expectations may lead to optimism in the economy improving thus the performance of a specific fiscal plan or can work towards the opposite direction leading to pessimism amplifying the contractionary effects of the consolidation in general we find that spending based consolidations last longer and lead to deeper recessions when agents are boundedly rational compared to the rational expectations benchmark while the opposite holds for tax based consolidations

real business cycles in this paper we demonstrate how certain very ordinary economic principles lead maximizing individuals to choose consumption production plans that display many of the characteristics commonly associated with business cycles our explanation is entirely consistent with i rational expectations ii complete current information iii stable preferences iv no technological change v no long lived commodities vi no frictions or adjustment costs vii no government viii no money and ix no serial dependence in the stochastic elements of the environment we also provide a completely worked out example of the type of artificial economy we have in mind the time series properties of the example exhibit some major features of observed business cycles although this type of model may not be capable of explaining all of the regularities in actual business cycles we believe that it provides a useful well defined benchmark for assessing the relative importance of factors e g monetary disturbances

anticipated fiscal policy and adaptive learning abstract the impact of anticipated policy changes when agents form expectations using adaptive learning rather than rational expectations is considered agents are assumed to combine limited structural knowledge with a standard adaptive learning rule these issues are analyzed using two well known set ups an endowment economy and the ramsey model in our scenario there are important deviations from both rational expectations and purely adaptive learning the approach could be applied to other frameworks

infrastructure provision and macroeconomic performance this paper studies the differences between private and government provision of infrastructure capital utilization decisions and their differential role in determining market prices for capital goods under the two regimes of infrastructure provision serve as a critical transmission mechanism for fiscal policy a subsidy to private providers of infrastructure is preferable to direct government provision irrespective of how the subsidy or expenditure is financed the case for private provision is much stronger in economies characterized by high levels of congestion the choice between private and government provision also has a crucial effect on the design of optimal fiscal policy 2011 elsevier b v all rights reserved

fiscal policy and occupational employment dynamics we document substantial heterogeneity in occupational employment dynamics in response to government spending shocks in the united states employment rises most strongly in service sales and office pink collar occupations by contrast employment in blue collar occupations is hardly affected by fiscal policy we provide evidence that occupation specific changes in labor demand are key for understanding these findings we develop a business cycle model that explains the heterogeneous occupational employment dynamics as a consequence of composition effects due to heterogeneous employment changes across industries and occupation specific within industry employment shifts due to differences in the short run substitutability between labor and capital services across occupations

anticipated tax reforms and temporary tax cuts a general equilibrium analysis macroeconomic studies of tax policy in dynamic general equilibrium usually assume that reforms hit the economy unexpectedly and last forever here we explore how previous results change when we allow policy changes to be pre announced and of finite duration and when these facts are anticipated by households and firms quantitatively we demonstrate a headstart advantage from pre announcement that is never caught up by a surprising reform the welfare gain stemming from a 5 year announcement phase of a corporate tax cut for example is estimated to be around 10 percent of the total gain from the reform we show that impulse responses of important variables like firm value dividends and investment differ qualitatively depending on whether the reform comes expected or not we are also able to demonstrate a genuine welfare gain from temporary tax cuts impulse responses generated by our numerical method can be retraced by phase diagram analysis which facilitates explanation and interpretation of the produced results

learning adaptive expectations and technology shocks this study explores the macroeconomic implications of adaptive expectations in a standard growth model we show that the self confirming equilibrium under adaptive expectations is the same as the steady state rational expectations equilibrium for all admissible parameter values but that dynamics around the steady state are substantially different between the two equilibria the differences are driven mainly by the dampened wealth effect and the strengthened intertemporal substitution effect not by escapes emphasised by williams 2003 consequently adaptive expectations can be an important source of frictions that amplify and propagate technology shocks and seem promising for generating plausible labour market dynamics

the consequences of an unknown debt target abstract several proposals to reduce u s debt reveal large differences in their targets we examine how an unknown debt target affects economic activity using a real business cycle model in which bayesian households learn about a state dependent debt target in an endogenous tax rule recent papers use stochastic volatility shocks to study fiscal uncertainty in our setup the fiscal rule is time varying due to unknown changes in the debt target households infer the current debt target from a noisy tax rule and jointly estimate the transition probabilities three key findings emerge from our analysis 1 limited information about the debt target amplifies the effect of tax shocks through changes in expected tax rates 2 the welfare losses are an order of magnitude larger when both the debt target state and transition matrix are unknown than when only the debt target state is unknown to households 3 an unknown debt target likely reduced the stimulative effect of the arra and uncertainty about the sunset provision in the bush tax cuts may have slowed the recovery and led to welfare losses

excludable and non excludable public inputs consequences for economic growth non excludable and excludable public inputs are introduced into an endogenous growth model we derive the equilibrium growth rate and design the optimal tax and user cost structure emphasizing the role of congestion and its consequences for the government s budget the latter comprises fee and tax revenues that are used to finance the public inputs although they may generate insufficient revenue to do so entirely we extend the model to allow for monopoly pricing of the user fee by the government most of the analysis is conducted for general production functions consistent with endogenous growth but the ces technology is also considered a vast literature has evolved emphasizing the role of public investment as a determinant of economic growth among the earliest contributions arrow and kurz 1970 is particularly significant while the seminal work of barro 1990 has been especially influential with respect to the contemporary endogenous growth literature stimulated by aschauer s 1989 findings pertaining to the high rate of return on public capital several authors have explored various aspects of the role of public capital in stimulating economic growth for example baxter and king 1993 and fisher and turnovsky 1998 examine the interaction between public and private capital in a ramsey type growth model while futagami et al 1993 perform a similar type of analysis in an endogenous growth context glomm and ravikumar 1997 analyse the growth effects of productive public spending in an overlapping generations setup extending the framework to include majority voting and alternative compositions of publicly provided goods and services they also indicate private alternatives to public provision but do not pursue this in detail cassou and lansing 1998 focus on the relationship between private and public capital showing how the evolution of the ratio between the two in the us economy since 1925 is broadly consistent with the predictions of a simple ramsey growth model they also show how the productivity slowdown in the us economy since the 1970s is more likely due to increasing tax rates than to non optimal public investment policy much of the literature including barro treats the public input as a pure public good freely available without restrictions or impediments to all agents in the economy but the public goods literature identifies many different characteristics that most public goods in fact exhibit notably the presence of rivalry and or excludability see e g cornes and sandler 1996 thus the treatment of a public

economic natural selection the theoretical structure of modern economics rests on the hypothesis that individual behavior is rational in the sense that choice can be described by utility maximizing behavior most economists view this hypothesis not as an assertion of procedural rationality but instead as a simple description of the outcomes of individual choice behavior furthermore requiring that every individual behave according to the predictions of rationality is typically viewed as too stringent even though many of our models assume it we are most confident about the predictions of rationality for aggregate behavior rather than individual behavior we believe that many but of course not all individuals behave approximately as predicted by models of rational behavior and we hope that our models are robust to small departures from rationality this belief is probably most firmly held for asset markets where many individuals interact repeatedly and the payoffs for good decisions can be large but why should we believe that individual level rationality hypotheses yield good predictions for aggregate asset market behavior there are two answers to this question the first answer entails adaptive response individuals who do not behave as predicted by rationality may modify their behavior over time they could imitate the successful they could experiment or they could learn from their past mistakes the second answer entails natural selection the market selects for those whose behavior is most nearly optimal those who for whatever reason behave as if they are rational take wealth away from those who behave otherwise ultimately the market is dominated by seemingly rational individuals and prices converge to their rational expectations equilibrium values this answer also requires some kind of innovation if the initial set of decision rules contains no rational rule natural selection alone will not drive the economy to rationality but if randomly chosen new rules enter the market from time to time rational or nearly rational rules will sooner or later enter the market and be selected for in the course of our research we have addressed both adaptation and natural selection here we focus on natural selection the appeal to natural selection for the defense of various rationality hypotheses has a long tradition in economics but until recently there was little formal investigation of its validity alchian 1950 and friedman 1953 both used it in defense of the hypothesis of profit maximization their argument was that firms that behave as if they maximize profits would drive out other non maximizing firms winter 1964 1971 1975 formalized and explored these ideas but the link between profitability and fitness in his work was assumed

does ricardian equivalence hold when expectations are not rational this paper considers the ricardian equivalence proposition when expectations are not rational and are instead formed using adaptive learning rules we show that ricardian equivalence continues to hold provided suitable additional conditions on learning dynamics are satisfied however new cases of failure can also emerge under learning in particular for ricardian equivalence to obtain agents expectations must not depend on government s financial variables under deficit financing

laffer strikes again dynamic scoring of capital taxes abstract we set up a neoclassical growth model extended by a corporate sector an investment and finance decision of firms and a set of taxes on capital income we provide analytical dynamic scoring of taxes on corporate income dividends capital gains other private capital income and depreciation allowances and identify the intricate ways through which capital taxation affects tax revenue in general equilibrium we then calibrate the model for the us and explore quantitatively the revenue effects from capital taxation we take adjustment dynamics after a tax change explicitly into account and compare with steady state effects we find among other results a self financing degree of corporate tax cuts of about 70 90 and a very flat laffer curve for all capital taxes as well as for tax depreciation allowances results are strongest for the tax on capital gains the model predicts for the us that total tax revenue increases by about 0 3 1 2 after abolishment of the tax

fiscal policy in the new neoclassical synthesis we analytically derive the cyclical effects of fiscal policy shocks in a new neoclassical synthesis model price stickiness has the consequence that a rise in government demand affects labor demand while at the same time the usual wealth effect boosts labor supply the strength of the demand effect depends on the response of the real interest rate governed by the monetary policy regime when the central bank controls money growth fiscal expansions are deflationary and might even be contractionary whereas output wages and inflation can increase when the rise in the real interest rate is dampened by an interest rate rule however price stickiness alone is not sufficient to explain a rise in consumption as predicted by keynesian theory

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

a simple recursive forecasting model abstract we compare the performance of alternative recursive forecasting models a simple constant gain algorithm used widely in the learning literature both forecasts well out of sample and also provides the best fit to the survey of professional forecasters

fiscal policy in general equilibrium this paper studies four classic fiscal policy experiments within a quantitatively restricted neoclassical model the authors main findings are as follows 1 permanent changes in government purchases can lead to short run and long run output multipliers that exceed one 2 permanent changes in government purchases induce larger effects than temporary changes 3 the financing decision is quantitatively more important than the resource cost of changes in government purchases and 4 public investment has dramatic effects on private output and investment these findings stem from important dynamic interactions of capital and labor absent in earlier equilibrium analyses of fiscal policy copyright 1993 by american economic association

turnpike properties of capital accumulation games abstract a differential game is considered in which players accumulate capital their payoff functions depend upon the capital stocks of both players and their cost functions are convex previous existence and stability results are relied upon to show that the game under an additional assumption possesses the following properties a every equilibrium of the infinite horizon game converges to the unique stationary equilibrium b for a time horizon long enough the finite horizon equilibrium stays in the neighborhood of the infinite horizon equilibrium except for some final time c for a time horizon long enough the finite horizon equilibrium stays in the neighborhood of the stationary equilibrium except for some initial and final time

is the political business cycle for real abstract this paper constructs and examines a macroeconomic model which combines features from both real and political business cycle models we augment a standard real business cycle tax model by allowing for varying levels of government partisanship and competence in order to replicate two important empirical regularities first that on average the economy expands early under democratic presidents and contracts early under republican presidents second that presidents whose parties successfully retain the presidency have stronger than average growth in the second half of their terms the model generates both of these features that conform to u s post world war ii data

analysis of nash equilibria in a class of capital accumulation games in a simple capital accumulation game we study existence and dynamic properties of the cooperative solution two kinds of markov perfect equilibria mpe and a trigger strategy equilibrium in the cooperative solution the stock always converges towards a steady state this property is shared by our first mpe whereas the second type of mpe may result in complicated dynamics a pareto comparison of both mpe depends on the parameter specifications but can turn out either way finally we show how the players can achieve the efficient payoffs of the cooperative solution as an equilibrium outcome by using trigger strategies

fiscal shocks and their consequences this paper investigates the response of hours worked and real wages to fiscal policy shocks in the post world war ii us we identify these shocks with exogenous changes in military purchases and argue that they lead to a persistent increase in government purchases and tax rates on capital and labor income and a persistent rise in aggregate hours worked as well as declines in real wages the shocks are also associated with short lived rises in aggregate investment and small movements in private consumption we describe and implement a methodology for assessing whether standard neoclassical models can account for the consequences of a fiscal policy shock simple versions of the neoclassical model can account for the qualitative effects of a fiscal shock once we allow for habit formation and investment adjustment costs the model can also account reasonably well for the quantitative effects of a fiscal shock

subordinated debt market discipline and bank risk this paper demonstrates that subordinated debt subdebt thereafter regulation can be an effective mechanism for disciplining banks by reducing the chance that managers of distressed banks can take value destroying actions to benefit themselves subdebt regulation may encourage banks to lower asset risk moreover subdebt regulation and bank capital requirements can be complements for alleviating the banks moral hazard problems to make subdebt regulation effective regulators may need impose ceilings on the interest rates of subdebt prohibit collusion between banks and subdebt investors and require subdebt to convert into the issuing bank s equity when the government provides assistance to the bank

fiscal policy and asset prices with incomplete markets we study the simultaneous impact of fiscal policy decisions on macroeconomic activity wealth distribution and asset prices we consider a general equilibrium overlapping generations model with incomplete markets and heterogeneous agents where government debt and capital are imperfect substitutes increases in public debt lead to significant increases in the riskless rate and to a reduction in the equity premium while higher capital income tax rates lead to a higher equity premium the crowding out effects on capital and output are much higher than in models where government debt and capital are perfect substitutes which thus ignore households portfolio reallocation decisions the author 2012 published by oxford university press on behalf of the society for financial studies all rights reserved for permissions please e mail journals permissions oup com oxford university press

learnability of an equilibrium with private information abstract this paper investigates the learnability of an equilibrium with private information agents of each type have their own private information about an exogenous variable and conduct adaptive learning with a heterogeneously misspecified perceived laws of motion plm that includes only this variable the paper shows that the existence of private information has a nonnegative impact on the learnability of the equilibrium that is the condition for learnability is unaffected or relaxed by heterogeneity and or misspecification in plms caused by private information in a new keynesian model with private information about fundamental shocks the learnability of the equilibrium is ensured by the taylor principle of monetary policy the paper also confirms that these results hold true not only in the presence of private information but also in a variety of informational structures

supply side reforms and learning dynamics this paper studies the nature the magnitude and the length of the transition after a capital tax cut the transition is analysed with adaptive learning under which agents do not need to adjust instantaneously to the change as with rational expectations re impulse response analysis reveals that the transition with learning is asymmetrically sensitive to the nature of the exogenous technological shock at the time of the reform if the reform coincides with a negative shock the transition to the new steady state is slow whereas if it coincides with a positive shock it is approximately the same as the one predicted by re the results imply that cutting capital income taxes before or during a recession may not be an effective means for short run fiscal stimulus

robust monetary policy with imperfect knowledge we examine the performance and robustness properties of monetary policy rules in an estimated macroeconomic model in which the economy undergoes structural change and where private agents and the central bank possess imperfect knowledge about the true structure of the economy private agents rely on an adaptive learning technology to form expectations and update their beliefs based on incoming data policymakers follow an interest rate rule aiming to maintain price stability and to minimize uctuations of unemployment around its natural rate but are uncertain about the economy s natural rates of interest and unemployment we show that in this environment the scope for economic stabilization is signiflcantly reduced relative to an economy under rational expectations with perfect knowledge furthermore policies that would be optimal under perfect knowledge can perform very poorly when knowledge is imperfect e cient policies that take account of private learning and misperceptions of natural rates call for more aggressive responses to in ation that would be optimal under perfect knowledge we show that such policies not only improve performance in our baseline model but are also quite robust to potential misspeciflcation of private sector learning and the magnitude of variation in natural rates

real business cycles and the animal spirits hypothesis abstract we calibrate a quantitative equilibrium macroeconomic model with an aggregate technology that is subject to increasing returns and show that this model may display fluctuations at business cycle frequencies even when there are no shocks to the fundamentals of the economy these fluctuations are due to the self fulfilling beliefs of investors which we call animal spirits we compare the impulse response functions predicted by our model and by two other more standard models with a four variable vector autoregression on u s data our animal spirits economy is the most successful of the three at matching broad features of the dynamic responses in the data journal of economic literature classification numbers e00 e3 e32

long run growth uncertainty observed macroeconomic forecasts display a positive correlation between expectations of long run growth of endogenous variables e g output and cyclical activity existing business cycle models appear inconsistent with the evidence this paper presents a model of the business cycle in which households have imperfect knowledge of long run growth rate of endogenous variables and continually learn about these growth rates the model features comovement and mutual influence between households growth expectations and market outcomes it can replicate the evidence on growth forecasts and suggests that optimism and pessimism about long run growth rates is a crucial ingredient in understanding business cycle fluctuations

market share pioneering advantage a theoretical approach in this paper we present an industry in which a pioneer has entered accumulated capital in the form of goodwill and in his monopoly period has also reduced his cost of production as a result of some form of learning by doing at some later date a newcomer enters his production cost is higher than that of the monopolist at that date however due to diffusion of information the costs of the two firms equate at some future date once the new firm enters the market a duopolistic game begins in which the firms choose prices and investment rates analyzing this game we discover the conditions under which the final market shares no longer depend on the order of entry the initial cost advantage the length of the monopoly period or the length of time it took the newcomer to overcome the pioneer s cost advantage we analyze the speed and pattern of convergence to the final market shares and the capital path of the pioneer in his monopoly period depending on his beliefs concerning the possibility of entry

habit formation and fiscal transmission in open economies in this paper we analyze the ability of an open economy version of the neoclassical model to account for the time series evidence on fiscal policy transmission revisiting the evidence we find that i government spending raises output while inducing a simultaneous decline of investment and the current account and ii the responses of output and investment are more muted in more open economies while current account deficits tend to be larger turning to the model we explore the role of habit formation for fiscal policy transmission specifically we show that the model can account for the evidence if consumption behavior is characterized by habit formation and the terms of trade adjust endogenously

the reality game abstract we introduce an evolutionary game with feedback between perception and reality which we call the reality game it is a game of chance in which the probabilities for different objective outcomes e g heads or tails in a coin toss depend on the amount wagered on those outcomes by varying the reality map which relates the amount wagered to the probability of the outcome it is possible to move continuously from a purely objective game in which probabilities have no dependence on wagers to a purely subjective game in which probabilities equal the amount wagered we study self reinforcing games in which betting more on an outcome increases its odds and self defeating games in which the opposite is true this is investigated in and out of equilibrium with and without rational players and both numerically and analytically we introduce a method of measuring the inefficiency of the game similar to measuring the magnitude of the arbitrage opportunities in a financial market we prove that the inefficiency converges to equilibrium as a power law with an extremely slow rate of convergence the more subjective the game the slower the convergence

distortionary taxes and public investment when government promises are not enforceable abstract we characterize the optimal financing of productive public capital and compute the welfare loss from being unable to commit to the ramsey policy because this calculation ultimately relies on numerical approximations we contrast alternative approaches while perturbation and linear quadratic methods deliver accurate steady states the latter can yield misleading policy implications during transitions we find that moving from a regime with commitment to one with discretion implies only a small welfare loss although markov perfect consumption falls noticeably short of its ramsey counterpart in steady state consumption under discretion is higher in the short run which largely offsets this long run loss

the output effect of fiscal consolidation plans abstract we show that the correct experiment to evaluate the effects of a fiscal adjustment is the simulation of a multi year fiscal plan rather than of individual fiscal shocks simulation of fiscal plans adopted by 16 oecd countries over a 30 year period supports the hypothesis that the effects of consolidations depend on their design fiscal adjustments based upon spending cuts are much less costly in terms of output losses than tax based ones and have especially low output costs when they consist of permanent rather than stop and go changes in taxes and spending the difference between tax based and spending based adjustments appears not to be explained by accompanying policies including monetary policy it is mainly due to the different responses of business confidence and private investment

fiscal spending shocks endogenous government spending and real business cycles abstract we analyze a real business cycle model in which the government optimally chooses public investment and nonmilitary current expenditures to maximize the welfare of the representative private agent we characterize the optimal response of endogenous spending to shocks to technology and to military expenditures comovements between the components of government spending and other macroeconomic aggregates predicted by the model are compared with the corresponding comovements in the u s data the model captures the qualitative features of the relative volatilities of the components of government spending quite well but predicts too high correlations between the components of government spending and output

disinflations in a model of imperfectly anchored expectations abstract we study disinflations under imperfect credibility of the central bank we propose a framework to model imperfectly credible announcements and use it to study the distribution of the output cost for a given disinflation imperfect credibility is modeled as the extent to which agents rely on adaptive learning to form expectations lower credibility increases the mean variance and skewness of the distribution of the sacrifice ratio when credibility is low disinflations become very costly for adverse realizations of the shocks but an opportunistic disinflation a disinflation implemented after a period of below trend inflation can significantly lower the sacrifice ratio with simulated data we reinterpret the reduced form evidence in sacrifice ratio regressions coefficient estimates from these regressions can be misleading for policymakers considering the cost of disinflation

the international ramifications of tax reforms supply side economics in a global economy this paper studies tax reforms in a dynamic model of a global economy calibrated to current u s and european tax policies world capital markets add consumption smoothing and income redistribution effects that alter closed economy predictions in the absence of taxes on foreign interest welfare gains of eliminating u s income taxes are enlarged by up to 34 percent at the expense of european losses caused by transitional declines in consumption and leisure and a permanent capital outflow in contrast if foreign interest is taxed the same tax reform reduces u s welfare 0 7 percent and increases european welfare 1 8 percent copyright 1998 by american economic association