international institutional lending arrangements to sovereign borrowers abstract recent financial crises in east asia and elsewhere have illustrated the problems that plague emergency liquidity arrangements and the lender of last resort role of the international monetary fund and other international institutions in particular these act under conditions of extreme uncertainty where potential sovereign borrowers as well as private financial institutions are kept in the dark regarding the intentions of the emergency lenders and the amounts and terms of emergency liquidity that can be tapped from april 1999 longer term credit lines are being offered by the imf designed to be awarded to healthy countries before they experience contagion or distress the paper evaluates the advantages of this form of imf lending and this new trend in imf operations it is argued that provision of imf financing through such long term lending facilities is better in some senses than shorter term lending long term contracts reduce the uncertainty with respect to imf intentions moral hazard problems are reduced for the borrowing country and financial markets know the future level and terms of imf support another advantage is that long term loan contracts improve the allocation of resources within the borrowing country much as private sector facility lending is the dominant mode of finance in many markets so facility lending has efficiency advantages when it is provided by the imf this efficiency advantage is derived formally it is shown that sovereign borrowers are actually better off when utilizing these as backup lines of credit instead of emergency borrowing that is conducted after distress occurs facility lending by international institutions can lead to a welfare improvement and superior resource allocation for sovereign borrowers the intuition for this is that when financial distress drives these borrowers to increase their debt risk premia in borrowing rates would not rise at least up to the limits established by the size of the facility

the political economy of bilateral bailouts imf loans during times of financial crisis often occur in conjunction with bilateral financial rescues these bilateral bailouts are substantial in size and a central component of international cooperation during financial crises we analyze the political economy of bilateral bailouts and study the trade offs that potential creditor governments experience when other countries find themselves in financial distress creditor governments want to stabilize crisis countries by providing additional liquidity particularly if the crisis country is economically or politically important to them but they are constrained by domestic politics politicians aim to balance these countervailing pressures they provide bailouts when their own economy is exposed to negative spillover effects and when the crisis country is important for geostrategic military or political reasons domestic economic and political constraints on the other hand limit their ability to bail out other countries we test our hypotheses using an original data set on bilateral bailouts by the g7 countries to countries that experienced financial crises between 1975 and 2010 the findings of our statistical analysis support our theoretical argument and contribute to a deeper understanding of international cooperation s complex structure during financial crises

bank incentives economic specialization and financial crises in emerging economies abstract we model the vulnerability of an economy to a financial crisis as arising from the interaction of the degree of economic specialization and bank debt financing the probability of a financial crisis is shown to increase in the degree of economic specialization bank debt financing has the beneficial effect of lowering the degree of economic specialization by increasing access to financing of investment opportunities that would not have been financed due to wealth constraints of entrepreneurs financial access effect however bank debt financing induces risk shifting incentives leverage effect the net effect on the probability of a financial crisis depends on which of these two effects dominates we show that commonly employed mechanisms in managing financial crises particularly bailouts induce an additional agency cost by distorting bank incentives to concentrate loans in specific sectors bank debt concentration effect we propose a tax based ex ante solution mechanism that simultaneously induces optimal investment and eliminates the bank debt concentration effect implementation issues and empirical policy implications are also discussed

further evidence on business cycle asymmetries in g7 countries this paper tests for business cycle symmetry in g7 countries during the post world war ii period using a number of tests each reflecting alternative definitions of business cycle asymmetry the tests are applied to monthly coincident economic indicators of business cycles this found that business cycles in the us are characterized by both longitudinal deepness and transversal steepness and sharpness asymmetries further it is found that asymmetric transition probabilties and time irreversibility are due to nonlinearities on the contrary business cycles in germany exhibits a symmetric behaviour between these extremes are the other countries for which at least one of the tests here considered rejects the null of cyclical symmetry particularly business cycle is characterized by deepness and sharpness in canada asymmetry in persistence in france and japan and asymmetric transition probabilities in france and united kingdom

nonlinearities in economic dynamics two reasons that led to the dominance of the linear stochastic difference equations approach the first one was the fact that the nonlinear systems seemed incapable of reproducing the statistical aspects of actual economic time series at best such models were able to produce periodic motion1 and an examination of the spectra of economic time series showed the absence of the spikes that characterise periodic data the emphasis on the equilibrium approach to aggregate economic behaviour cf lucas i 986 would make things even more difficult the plethora of stability results for models of infinitely lived agents with perfect foresight turnpike theorems suggested that even the regular fluctuations that had been derived in the literature on endogenous business cycles were incompatible with a theory that had solid microeconomic foundations further this indicated that while nonlinearities could be present the explanations of the fluctuations had to rest solely on the presence of exogenous shocks that working through the equilibrating mechanism would create the observed randomness if such shocks were absent the system would tend to a stationary state the second reason was the empirical success of the models based on linear stochastic difference equations low order autoregressive processes captured some of the features of aggregate time series in turn these processes can in principle result from an economy with complete markets where production is subject to exogenous shocks though the task of confronting these equilibrium models with actual data has not yielded uncontroversial results see the discussion and references in section i there was no obvious gain in the

on the indeterminacy of capital accumulation paths abstract in neoclassical optimal growth models the stability of the accumulation paths depends on the discount parameter we prove that for discount factors small enough the policy function which describes an optimal path can be of any type the result is achieved using the notion of concavity we adopt a constructive approach given any twice differentiable map we show how to construct an optimal growth problem which produces that map as the optimal policy function a consequence is that chaos can appear in these models we also provide bounds on the values of the discount parameter for which indeterminacy is possible

asymmetric time series and temporal aggregation the detection of nonlinearities could depend on the sampling frequency asymmetric monthly series may become symmetric when aggregated to quarterly or annual frequencies we test against nonlinearity using the nonlinear autoregressive asymmetric moving average arasma model which nests the linear arma model as a special case using monthly quarterly and annual swedish unemployment series we find support for symmetry linearity in the annual series but not in the monthly and quarterly series

money still makes the world go round the zonal view many leading monetary economists have come to regard the monetary aggregates as obsolete measures of the monetary policy stance this critique has led some to view money as having lost its central role in the conduct of monetary policy we say to those advocating excising money from monetary policy not so fast to better understand the potential role for money we develop a zonal view of monetary policy which reflects the historical regularity for the relative informativeness of the quantitative measures of monetary policy such as the monetary aggregates and real interest rates to depend on the inflation zone in which a central bank finds itself the zones range from high inflation zone 1 to deep deflation zone 5 with intermediate zones of moderate inflation zone 2 low inflation zone 3 and low deflation zone 4 we find considerable support for this view in the historical data which stretches back to the 19 th century seen from this perspective the past experience of central banks casts doubt on the singular importance often attributed to the short term real interest rate as an indicator of the stance of monetary policy this applies especially in the current low inflation environment in which many central banks find themselves the zonal view has far reaching implications for monetary policy frameworks for the analytical efforts to understand the monetary policy transmission mechanism and for central bank communication strategies this paper was prepared for the 21 st congress of the european economic association held in vienna on august 27 2006 the views expressed in the paper are solely those of the authors

a characterization of erratic dynamics in the overlapping generations model abstract in this paper we characterize and give examples o wide classes of utility functions which generate erratic dynamics in the standard deterministic overlapping generations model erratic dynamics refers to feasible trajectories which are bounded but which do not converge to stationary points or periodic orbits we show that such trajectories are pareto efficient we introduce credit into the model and show how a constant credit expansion rate can result in erratic trajectories in prices and the real value of credit finally we briefly discuss certain technical aspects of the mathematics used and the statistical nature of the dynamics that can arise from deterministic dynamical systems

further evidence on the asymmetric behavior of economic time series over the business cycle evidence has recently been presented by salih neftci to support the hypothesis that recessions in economic activity tend to be steeper and more short lived than recoveries in economic activity that evidence however was confined to the behavior of the unemployment rate in the united states in this paper it is shown that when neftci s methods are applied to analyze the behavior of real gross national product investment and productivity in the united states or when they are used to analyze industrial production abroad the asymmetry hypothesis seems to be less compelling

stationary sunspot equilibria in a finance constrained economy abstract stationary sunspot equilibria are shown to exist in a production economy with infinite lived agents when it is not possible to borrow against future wage income equilibrium fluctuations exhibit persistence over time scales of the same order of magnitude as observed business cycles an active fiscal policy that stabilizes aggregate money expenditures can prevent such fluctuations

sovereign debt and its restructuring framework in the eurozone debt is a particularly serious macroeconomic problem in the eurozone public debt ratios are high by international historical standards with no immediate prospect of a significant reduction private corporate and household debt ratios are either flat or rising banks remain fragile and impose a contingent liability on the public purse the most stressed economies have not had the option of renewing economic growth through exchange rate depreciation and a boost to exports thus fiscal austerity has been their principal instrument to achieve debt reduction but since austerity also hurts growth the debt to gdp ratios have barely budged persistent low growth has also created deflationary tendencies which further raise the challenge of debt reduction

a key currency view of global imbalances abstract this study divides the world into currency zones according to the co movement of each currency with the key currencies the dollar zone groups economies that produce well over half of global gdp the euro zone now includes almost all of europe and some commodity producers but remains less than half the size of the dollar zone the dollar zone share has shown striking stability despite big shifts across zones over time these include the demise of the sterling zone and the expansion of the dm euro from northwestern europe to europe and beyond global imbalances look very different from a currency perspective in the 2000s the dollar zone s current account improved and became more or less balanced around the time of the global financial crisis gfc even as the us current account plumbed all time lows the dollar zone s net international investment position was also balanced around the time of the gfc thus neither flow nor stock readings on the dollar zone support widespread predictions in the early 2000s of an imminent dollar crash in fact most of the secular widening of current accounts occurred within currency zones where by construction investors bear relatively limited currency risk our account of the dollar s dominance rests not on the us economy s size but rather on the size of the zone with limited currency risk vis a vis the dollar in such a world the rise of another large economy poses the question not of relative size but rather of re alignment of third currencies what if the renminbi becomes a key currency alongside the dollar and the euro already some emerging market currencies are co moving with the renminbi against the dollar on current evidence a renminbi zone would shrink the dollar zone and widen its current account deficit

from obscurity to notoriety a biography of the exchange stabilization fund the u s treasury s 20 billion loan to mexico in january 1995 from the exchange stabilization fund esf brought to public notice the fund that had functioned in obscurity since its authorization by the gold reserve act of january 31 1934 the design of the esf as set forth in the statute contributed to its obscurity its stated mission was to stabilize the exchange value of the dollar but it has also assumed a role that had no mandate that of lender to favored countries esf s intervention activities and the federal reserve s warehousing of esf foreign currency assets are questionable a statistical profile of the esf accounts for the growth of its working balance from 200 million in 1934 to 42 6 billion in assets in 1995 copyright 1997 by ohio state university press

the floating pound and the sterling area 1931 1939 1 introduction the sterling area in the 1930s 2 sterling and the rupee 3 the canadian debate over money and exchanges 1930 1934 4 south africa sterling and the gold standard 1931 and thereafter 5 australia and new zealand 1930 1939 6 monetary preparations for the world economic conference 7 united kingdom policy at the world monetary and economic conference 8 talking about exchange stabilization autumn 1933 through june 1936 9 the tripartite agreement of 1936 10 intergovernmental conversations and the management of sterling 1936 1939 11 conclusion the significance of sterling

nonlinearity and chaos in economic models implications for policy decisions this survey paper discusses the policy implications that can be expected from the recent research on nonlinearity and chaos in economic models expected policy implications are interpreted as a driving force behind the recent proliferation of research in this area in general it appears that no new justification for policy intervention is developed in models of endogenous fluctuations although this conclusion depends in part on the definition of equilibrium when justified however policy tends to be very effective in these models copyright 1993 by royal economic society

chaotic dynamics in economic time series abstract there has recently been considerable interest in chaotic dynamics in a variety of disciplines this paper introduces and then surveys some of the associated literature and techniques applications to economic theory are discussed but the primary focus is on empirical applicability in addition to surveying the literature we also provide an example of the use of these techniques in economics we conclude by highlighting the importance of the techniques for empirical work as well as considering their context in econometric methodology

the mirage of fixed exchange rates this paper discusses the profound difficulties of maintaining fixed exchange rates in a world of expanding global capital markets contrary to popular wisdom industrialized country monetary authorities easily have the resources to defend exchange parities against virtually any private speculative attack but if their commitment to use those resources lacks credibility with markets the costs to the broader economy of defending an exchange rate peg can be very high the dynamic interplay between credibility and commitment is illustrated by the 1992 swedish and british crises and the 1994 95 mexican collapse we also discuss the small number of successful fixers

can agents learn their way out of chaos abstract in an olg model with adaptive learning forecast errors of the agents are analyzed in regions where the resulting dynamical system behaves chaoticly agents think they are living in stochastic world it is shown that they cannot reject the hypothesis that mean and autocorrelation coefficients of their forecast errors are 0 thus they have no incentive to switch to another learning rule predictions cannot be unmasked as being wrong because of the limited statistical tools the agents possess bounded rationality these phenomena occur in the olg model even with a cobb douglas utility function

nonlinear dynamics and stock returns simple deterministic systems are capable of generating chaotic output that mimics the output of stochastic systems for this reason algorithms have been developed to distinguish between these two alternatives these algorithms and related statistical tests are also useful in detecting the presence of nonlinear dependence in time series in this article the authors apply these procedures to stock returns and find evidence that indicates the presence of nonlinear dependence on weekly returns from the center for research in security prices value weighted index copyright 1989 by the university of chicago

ordinary least squares learning and nonlinearities in macroeconomics the paper reviews the literature on adaptive learning in macroeconomic settings where the formation of expectations is particularly relevant special attention will be given to simple two period overlapping generations models with a unique fixed point perfect foresight equilibrium in this kind of scenario eventual long term periodic and a periodic cycles are exclusively the result of the process of learning the outcome that high rates of money growth have a potentially destabilizing effect generating periodic fluctuations and chaos is emphasized the persistence of systematic forecast errors in a scenario where agents are supposed to act rationally is relevant in this context and it will be thoroughly discussed resorting to the notions of self fulfilling mistakes consistent expectations equilibria and beliefs equilibria

equilibrium models displaying endogenous fluctuations and chaos abstract this paper surveys current developments in dynamic general equilibrium theory concerned with conditions under which endogenous fluctuations are possible existing contributions are divided into two classes the larger one consists of models with a unique perfect foresight equilibrium while the second includes models where equilibrium is indeterminate and the set of equilibria involving endogenous fluctuations includes sunspots equilibria while the two classes of models involve oscillations of different natures and with different policy implications we show that both are consistent with optimizing behavior and competitive equilibrium

is the business cycle characterized by deterministic chaos abstract tests are conducted on u s macroeconomic data for the presence of low dimensional deterministic chaos where deterministic chaos is defined as in grandmont s 1985 walras bowley lecture or in brock 1986 the idea is to test for evidence of endogenous instability causing the business cycle low order autoregressions are hard to reject with our methods evidence of chaos is weak but our tests may be too weak to detect it evidence of nonlinearity is present in employment 1950 i to 1983 iv unemployment 1949 i to 1982 iv monthly post war industrial production and pig iron production 1877 1937

chaos significance mechanism and economic applications imagine a bargaining model say involving diplomats negotiating tariff levels or a disarmament treaty in which each party has been instructed by higher headquarters to respond to each new offer by her opposite number with a counteroffer that is to be calculated from a simple reaction function provided in advance both negotiating parties are prohibited from revealing their own reaction functions to the other if the perfectly deterministic sequence of offers and counteroffers that must emerge from these simple rules were to begin to oscillate wildly and apparently at random the negotiations could easily break down as each party not understanding the source of the problem came to suspect the other side of duplicity and sabotage yet all that may be involved as we will see is the phenomenon referred to as chaos a case that is emphatically not pathological but in which a dynamic mechanism that is very simple and deterministic yields a time path so complicated that it will pass most standard tests of randomness chaos has become a subject of great interest to specialists and nonspecialists alike besides economics it has entered the literature of geometry physics ecology and meteorology it has been written about at length in the new york times magazine and scientific american as well as technical publications this article seeks to describe what it is how it works and what it means for economics

stabilizing competitive business cycles abstract we study how stylized monetary proportional money transfers fiscal lump sum money transfers and public expenditure policies may eliminate endogenous deterministic cycles and stationary markov sunspot equilibria in a simple version of the overlapping generations model we also present new constructive methods for analyzing stationary markov sunspot equilibria in such a framework

on the complexities of complex economic dynamics complex economic nonlinear dynamics endogenously do not converge to a point a limit cycle or an explosion their study developed out of earlier studies of cybernetic catastrophic and chaotic systems complexity analysis stresses interactions among dispersed agents without a global controller tangled hierarchies adaptive learning evolution and novelty and out of equilibrium dynamics complexity methods include interacting particle systems self organized criticality and evolutionary game theory to simulate artificial stock markets and other phenomena theoretically bounded rationality replaces rational expectations complexity theory influences empirical methods and restructures policy debates

international debts what s fact and what s fiction presidential address to the western economic association july 2 1988 schwartz international debts the official strategy on the international debt problem was breached in may 1987 when citicorp acknowledging the likelihood of credit losses on its latin american loans announced that it was increasing its reserves by 3 billion nineteen banks between 26 may and 8 july also announced additions to their loan loss reserves in aggregate amounting to over 12 billion according to musumeci and sinkey 1988 in may 1988 the general accounting office gao estimated that reserves of u s banks against their troubled loans to ldcs totaled about 21 billion whereas adequate provisioning would require reserves of 49 billion see the wall street journal 19 may 1988 the gao used prices on secondary debt markets in determining the adequacy of loan reserves the banks and regulators however dispute the gao s report see the wall street journal 13 may 1988 the secondary markets they contend are thin and transactions of even moderate size cannot be executed at quoted prices the price quotations may also misrepresent the prospect of repayment for the following reason by holding a foreign country s debt a creditor bank has been subject to the implied obligation to lend new money pro rata to that country however by selling the debt on the secondary market a creditor bank is released from that obligation and hence may accept a lower price than would otherwise be the case on the other hand as sachs and huizinga 1987 579 87 note the decline in bank equity prices since 1982 closely matches the secondary market valuation of ldc exposure the qualifications concerning the significance of the secondary market prices of foreign debt did not apply to prices of foreign bonds that in the past traded at a discount in the market those prices reflected solely the probability of repayment of the bond the additions to loan loss reserves in 1987 reduced the banks reported income and their book capital equity was reduced by a transfer to reserves and plans to issue equity were announced by many banks following their additions to reserves the reserves however are not charged against current income for tax purposes should write offs occur in the future or agreements be reached with the debtors to reduce outstanding debt the losses will be charged to reserves with no effect on reported income latin american debt has not been written down because of the additions to reserves and no forgiveness is involved for ldc debts the banks face difficulties in reducing their developing country debt by sales swaps and write offs loan agreements may prohibit repurchase of the debt by the borrower hence limiting the sales option 14 swaps for local currency or equity have had only small effects on debt reduction j p morgan and company earlier this year devised a program with mexico that had the blessing of the u s treasury morgan swapped 400 million of its mexican government debt for 263 million twenty year mexican government bonds the mexican issue was collateralized by twenty year u s treasury zerocoupon bonds at time of sale priced to pay 8 41 percent annually that mexico bought with 2 56 billion of its international reserves swaps by other banks participating in the program reduced mexico s bank debt by about 1 billion although a 10 billion reduction had been forecast morgan regarded the swap as advantageous because it also served to reduce its obligation to supply future loans to mexico for other banks the size of the discount on the swap made the deal unattractive 15 the third way for the banks to reduce exposure to developing country debt is write offs write offs have limited appeal they risk inciting political pressure to force debt forgiveness the regulators the u s government and international agency lenders continue to pressure the banks to provide additional loans to the latin american debtors that are either in arrears on interest payments or pay a large percentage of their trade surplus to cover service charges

the unemployment rate and the business cycle in britain an aggregate and regional analysis jones d manning n and stevenson m 1994 the unemployment rate and the business cycle in britain an aggregate and regional analysis reg studies 28 591 604 it has been suggested that if the business cycle is to be explained then its behaviour should be related to a non linear dynamic process not unlike a limit cycle the time irreversibility exhibited by post war unemployment data is not untypical of a pattern generated by such a non linear structure such a possibility could have important implications for economic policy in certain cases non linearities make forecasting extremely hazardous if not impossible as base line measurement errors cause prediction errors to accumulate at an exponential rate equally worrying is that fundamentally mistaken policy can arise when linear specifications are used to approximate non linear relationships the present paper tests for non linearities in the dynamics of regional unemployment in britain appealing to the idea of a regime switching process we u

grand strategy and foreign economic policy british grand strategy in the 1930s variation in the need for military and political support from military allies affects the degree to which foreign economic policies will discriminate in favor of military allies and against adversaries and other countries powers in need of such support will pursue discriminatory foreign economic policies in order to change the configuration of domestic interests to favor not only closer economic relations but also closer political relations by strengthening domestic support for an alliance policymakers make it more difficult for their allies to renege on alliance commitments stronger political relations in turn reinforce the deterrent effect of the alliance because the net strategic benefits from closer relations in their case are lower powers that can go it alone without support from allies will refrain from discriminatory policies shifts in strategic need make it possible to explain variation in the links between security considerations and foreign economic policies within alliances over time and also across alliances british grand strategy in the 1930s illustrates how shifts in strategic need influence the degree to which foreign economic policies discriminate in favor of potential military allies

on endogenous competitive business cycles the belief that the long run equilibrium of a competitive monetary economy that does not experience any exogeneous shocks whether originating from the external environment or from policy should be modelled as a state that is stationary or perhaps growing at a constant rate seems to be deeply rooted in the mind of some economists

living in an imaginary world that looks real abstract in the paper we show using standard approaches general equilibrium modeling and the assumption of complete rationality that the macroeconomic environment is endogenous and is indeterminate specifically it is argued without resorting to sunspot type arguments that microeconomic fundamentals do not suffice to characterize the economy at the macro level in particular we show how perceptions of rational agents of the workings of the economy a shape the environment b affect the environment sufficiently to ensure that rational economic agents find the observed environment consistent with their beliefs even though it is not as a by product we illustrate that endogenous macro uncertainty can arise as an outcome if rational economic agents whose expectations are anchored on endogenous variables expect them to arise finally we show that systematic errors can persist indefinitely under rationality

determinants of exchange rate regime switching abstract exchange rate policy in many emerging markets shifts between a stronger and weaker commitment to peg this observation raises the following questions which we address in our paper does intervention policy exhibit switching and if so what causes policy to shift the theoretical literature increasingly points to the critical importance of financial fundamentals chinn m d kletzer k m 2001 imperfect information domestic regulation and financial crises in glick r moreno r spiegel m eds financial crises in emerging markets cambridge university press cambridge pp 196 237 dooley 2000 chang r velasco a 2005 monetary policy and the currency denomination of debt a tale of two equilibria kennedy school of government working paper series harvard university cambridge massachusetts among others direct empirical validation to date is limited however although relevant intuitions come from duration and indicators literature kaminsky g l reinhart c m vegh c a 2004 when it rains it pours procyclical capital flows and macroeconomic policies nber macroeconomics annual national bureau of economic research inc domac i peria m s 2003 banking crises and exchange rate regimes is there a link journal of international economics 61 41 72 tudela m 2004 explaining currency crises a duration model approach journal of international money and finance 23 799 816 we use a panel of quarterly data starting 1985 through 2004 for 14 countries mainly from latin america and east asia and adopt a novel two step empirical strategy first we apply regime switching methods to two simple indices of central bank exchange rate policy this generates likelihoods of high and low intervention in the second step we establish the variables that determine these probabilities we find strong evidence that the economy s balance sheet and economic performance determine the likelihood of switching in the exchange rate regime specifically an increase in reserve currency debt relative to assets raises potential capital losses from devaluation and reduces the probability of switching to a low intervention regime as does a decline in growth the purpose here is not to present an alternative regime classification levy yeyati e sturzenegger s 2005 classifying exchange rate regimes deeds vs words european economic review 49 1603 1635 reinhart c m rogoff k 2004 the modern history of exchange rate arrangements a reinterpretation quarterly journal of economics available at http www puaf umd edu faculty papers reinhart papers htm but to establish the relative importance of different constraints on the central bank which has policy implications the empirical approach and specification is flexible to whether intervention is discrete or gradual and to whether or not the central bank sterilizes

on learning to forecast in an endogenous growth model with externalities abstract this paper investigates whether learning leads to perfect foresight in a growth model that might present local indeterminacy of perfect foresight equilibria the paper asserts that under some parametric conditions on technology and preferences equilibria under the assumption of learning converge to a limit point that is different from the one corresponding to perfect foresight equilibria the paper also concludes that endogenous cycles may emerge in the economy with learning and in the economy with perfect foresight however the combination of parameters for which these fluctuations appear may differ in each economy

rational choice and erratic behaviour in this paper we show that rational choice in a stationary environment can lead to erratic behaviour when preferences depend on experience we mean by erratic behaviour choice sequences that do not converge to a long run stationary value or to any periodic pattern early investigations of the effects of experience on choice goes back to pareto see also benhabib 1979 some keynesian theories of the consumption function incorporate the effects of experience and habit formation on current levels of consumption duesenberry 1949 modigliani 1949 and brown 1952 a general model of experience dependent choice was described in day 1970 and investigated in day and kennedy 1971 while the specific issue of the existence of stable representable long run consumer demand when tastes vary endogenously has been treated by gorman 1967 pollak 1970 1976 weizsaicker 1971 mccarthy 1974 and hammond 1976 pollak gave conditions for the representability of long run choice when the equations of preference dependence are linear and utility additive hammond in a generalization of these findings provides conditions for stable representable long run choice when preferences are acyclic a condition which in essence assures convergence to a long run choice

are economic time series asymmetric over the business cycle it has long been argued that major cyclical variables such as the unemployment rate display an asymmetric behavior over various phases of the business cycle the paper provides a statistical test for this hypothesis using the framework of finite state markov processes i implement a test to see if the behavior of the unemployment rate is characterized by sudden jumps and slower drops it is argued that the framework provided in the paper can also be used to test other sample path properties of economic time series

are output fluctuations transitory according to the conventional view of the business cycle fluctuations in output represent temporary deviations from trend the purpose of this paper is to question this conventional view if fluctuations in output are dominated by temporary deviations from the natural rate of output then an unexpected change in output today should not substantially change one s forecast of output in say five or ten years our examination of quarterly postwar united states data leads us to be skeptical about this implication the data suggest that an unexpected change in real gnp of 1 percent should change one s forecast by over 1 percent over a long horizon

imperfect foresight and chaos an example of a self fulfilling mistake abstract we consider an overlapping generations economy with a single production sector and a government first we assume that the households have imperfect foresight in the sense that they cannot distinguish between the trajectories of a deterministic chaotic system and a stochastic process it is shown that mistaking a deterministic chaotic system for a stochastic one is a self fulfilling mistake because the possibility of making this mistake arises only when it is made the unique perfect foresight equilibrium is proved to exhibit simple dynamics for most parameter values finally we show that when agents apply simple econometric models to build their expectations the resulting dynamics resemble the chaotic dynamics of the imperfect foresight equilibrium under certain parameter constellations while they are close to the simple dynamics of the perfect foresight equilibrium for other parameter values

under what circumstances past and present have international rescues of countries in financial distress been successful recent events in asia and other parts of the globe have prompted calls from many quarters for international rescue of the monetary or fiscal authorities in distressed countries we contrast the experience of rescues of monetary authorities before 1973 of advanced countries temporarily short of liquidity with recent experience of bailouts international rescues in the past have involved relatively small amounts of money sufficient to stave off devaluation or abandonment of a fixed exchange rate while remedial policies were put in place recent bailouts have involved handing over relatively large amounts to both foreign lenders and domestic investors after devaluation of a pegged exchange rate to avoid their incurring wealth losses we document past rescues whether successful or unsuccessful by monetary regimes and show what is different today from past experience

embeddedness inflation and international regimes the imf in the early postwar period1 this article explores why the international monetary fund imf adopted a set of orthodox anti inflationary policy prescriptions during the early postwar period when keynesian thinking was predominant drawing on primary documents from the imf archive and secondary literature the author argues that these early trends were fostered by dynamics familiar to organizational sociologists because organizations are designed by architects possessing bounded rationality they must adapt to circumstances unforeseen at their founding they may also be pushed in unexpected directions by the influential actors in their environments the power of professionals and the propensity to routinization international regimes which are partly made up of organizations may therefore be prone to internal contradictions

on learning and rational expectations in an overlapping generations model abstract this paper investigates whether learning does actually lead to rational expectations in an overlapping generations model with fiat money expectations are formed according to a family of expectations functions containing a rational expectations scheme and indexed by a single parameter this parameter is updated in every period to fit the latest observations one finds that unless the agents have rational expectations to start with expectations will generally not converge towards rational expectations in this simple model

a retrospective on the bretton woods system lessons for international monetary reform at the close of the second world war when industrialized nations faced serious trade and financial imbalances delegates from forty four countries met in bretton woods new hampshire in order to reconstruct the international monetary system over the next 25 years with currencies fixed to the american dollar world trade expanded vigorously inflation remained moderate and national income in industrialized countries rose faster than during any other period in this volume three generations of scholars and policy makers some of whom participated in the 1944 conference consider how the bretton woods system contributed to economic stability and rapid growth between 1945 and 1971 and discuss the future of the international monetary system in light of the bretton woods experience since president richard m nixon ended the bretton woods system in 1971 exchange rates have exhibited increasing flexibility after twenty years of floating rates however there is considerable interest in once again limiting exchange rate flexibility the apparent success of the european monetary system a fixed rate arrangement loosely based on the postwar system and the prospect of european monetary unification increase interest in a new internationally stable exchange rate moreover some academics and government officials see fixed rates as a way to help eastern europe and the former soviet union cope with pressing economic and political problems the economists historians political scientists and policy makers who contribute to this volume relate the bretton woods system to earlier fixed rate schemes and consider the political background of the original new hampshire meeting using recenteconomic theory for example work on time consistency and credibility they explore adjustment liquidity and transmission under the system the way it affected developing countries and the role of the international monetary fund in maintaining a stable rate the authors examine th

some evidence concerning macroeconomic chaos abstract an empirical assessment of a linear stochastic perspective for canadian macroeconomic time series is presented the methods used are based on the mathematics of chaos present evidence suggests that low order deterministic chaos does not provide a satisfactory characterization of the data the absence of significant nonlinear structure for the investment and unemployment series is of particular note in light of past findings with american data the degree to which the use of a time trend can impose a pseudo structure on the data is illustrated

chaotic learning equilibria chaotic temporary equilibrium trajectories under least squares learning are shown to exist in a standard version of the overlapping generations model theses trajectories show forecast errors that never vanish thus we do not find convergence to an equilibrium in which agents have perfect foresight complex trajectories can even be found in the case of savings functions which are monotonically decreasing in the expected gross rate of inflation in this case no cyclical or chaotic trajectories with perfect foresight exist thus learning alone is a source of chaotic dynamic journal of economic literature classification numbers d83 d84

business cycle asymmetry a deeper look this paper distinguishes two types of asymmetry in business cycles deepness and steepness deepness is defined as the characteristic that troughs are further below trend than peaks are above most previous research has focused exclusively on steepness which refers to cycles in which contractions are steeper than expansions a test for deepness is proposed and applied to u s post war quarterly unemployment real gnp and industrial production evidence of deepness is found for unemployment and industrial production while the evidence for real gnp is weaker previous evidence of steepness in unemployment is confirmed

on the consistency of backward looking expectations the case of the cobweb in dynamic models of economic fluctuations backward looking expectations with systematic forecasting errors are inconsistent with rational behaviour in non linear dynamic models exhibiting seemingly unpredictable chaotic fluctuations however simple habitual rule of thumb backward looking expectation rules may yield non zero but nevertheless non systematic forecasting errors in a chaotic model expectational forecasting errors may have zero autocorrelations at all lags even for rational agents patterns in these forecasting errors may be very difficult to detect especially in the presence of small noise backward looking expectations are then not necessarily inconsistent with rational behaviour we investigate whether simple expectation schemes such as naive or adaptive expectations can be consistent with rational behaviour in the simplest of all non linear dynamic economic models the non linear cobweb model

mexico and the development of the practice of the international monetary fund abstract mexico has had a striking influence on the imf s articles and on the development of some of its most important policies both before and after the present version of the articles took effect in more recent years the problem of mexico s external debt has produced changes in the imf s relations with commercial banks its practice of surveillance and on the use of its resources under stand by arrangements in addition impending changes in the imf s response to external contingencies can be attributed to experience with mexico one of the generalizations drawn from this experience is that the imf s practice is not determined solely by the major industrialized countries

subjective temporary equilibrium abstract this paper introduces within the framework of a simple example the notion of a subjective temporary equilibrium the underlying relation linking forecasts to equilibrium values of the state variable is linear however agents perceive a non linear law that governs the rate of adjustment between successive periods and forecast using linear approximations to the non linear law of motion this is shown to generate a non linear law of motion for the state variable with the feature that the agent s model describes correctly the period wise evolution of the economy the resulting non linear law of motion is referred to as a subjective temporary equilibrium as its specification is determined largely by the subjective beliefs of the agents regarding the dynamics of the system in a subjective equilibrium agents forecasts are generated by taking linear approximations to a correctly specified law of motion and the forecasts may accordingly be interpreted as being boundedly rational in a first order sense there exist specifications that admit the possibility of cyclical behaviour

cobweb dynamics under bounded rationality this paper discusses recent work on expectation formation in the familiar cobweb hog cycle model a convenient feature of the model is the fact that it has a unique rational expectations equilibrium ree attention will be focused on whether this unique ree can be learned under bounded rationality with agents using simple habitual rule of thumb forecasting rules or whether other approximate rational expectations equilibria can arise where forecasts are although not perfect approximately correct in particular the possibility of chaotic equilibria under bounded rationality will be discussed both the homogeneous agent case and the heterogeneous case with evolutionary competition between different forecasting rules will be discussed recent experimental work on expectations formation in the cobweb economy suggests excess volatility and endogenous possibly chaotic price fluctuations driven by the interaction of competing boundedly rational agents