testing the stationarity of interest rates using a sur approach abstract using data on average yields to maturity of german bonds with different time to maturity it is shown that the time series contain a unit root if the standard augmented dickey fuller test is applied separately to each series to improve the power of the test we carried out a recently developed approach estimating the regressions for each time to maturity jointly using a seemingly unrelated regressions approach

the sources of sovereign risk a calibration based on levy stochastic processes abstract governments choose to issue risky or riskless debt depending on the nature of the stochastic process of output we use brownian motion and poisson shocks a modeling method in the literature on corporate default known as levy processes to approximate a decomposition of the output process into a smooth and a jump component using an eaton and gersovitz 1981 model of debt repudiation we show that the brownian part explains the counter cyclical behavior of the current account and the poisson part explains the risk of default thus enabling our model to account for key stylized facts regarding sovereign risk

sovereign debt as a contingent claim a quantitative approach abstract we construct a dynamic equilibrium model with contingent service and adverse selection to quantitatively study sovereign debt in the model benefits of defaulting are tempered by higher future interest rates for a wide set of parameters the only equilibrium is one in which the sovereign defaults in all states additional output losses however sustain equilibria that resemble the data we show that due to the adverse selection problem some countries choose to delay default to reduce loss of reputation moreover although equilibria with no default imply greater welfare levels they are not sustainable in highly indebted and volatile countries

fiscal consequences for mexico of adopting the dollar dollarization implies a reduction in the menu of assets available to the government and to the private sector in managing risk whatever the gains from dollarization the costs of reducing the asset menu need to be weighed against them this paper presents models one a simple generalization of a well known model of tax smoothing by ba1ao in which these costs are explicit along the way it suggests that there is likely to be no reduction in interest costs to the government from dollarization recently economists have been paying increasing attention to a dynamic general equilibrium approach to the theory of the price level that is often called the fiscal theory of the price level or ftpl this way of thinking emphasizes the role of fiscal and monetary policy in determining the risk and return properties of government liabilities it is particularly useful in analyzing proposals for large scale institutional changes that imply shifts in monetary and fiscal policies when dollarization is considered from this perspective some disadvantages are brought to light that may not be so apparent from other points of view section 1 below lays out the main ideas of ftpl section 2 displays a model that extends an earlier one of barro s to argue that optimal fiscal policy will use surprise inflation to achieve lower deadweight tax loss than would otherwise be possible section 3 considers the composition of government liabilities along the lines of the theory of corporate finance asking if dollarization will reduce the cost of funds section 4 presents annual estimates of the unanticipated returns to holders of u s government debt to show that these are substantial and are to some extent timed to match legitimate periods of fiscal stress as the optimality theory of section 2 would suggest section s discusses the lendel of last resort function and its connection to these fiscal issues section 6 briefly discusses some alternatives to pure dollarization in our concluding section 7 we sum up finding much to worry about in the prospect of dollarization

nominal price rigidity money supply endogeneity and business cycles abstract this paper investigates the ability of nominal price rigidity to explain the co movement of inflation with the cyclical component of output observed in the post war u s data a dynamic general equilibrium model is constructed with the introduction of monopolistic competition and nominal price rigidity in a standard real business cycle model allowing for an endogenous money supply rule it is then demonstrated that sticky price models can explain the observed associations between movements in inflation and output much better than flexible price models this result depends little on whether money supply is assumed to be endogenous or not

mean reversion in g 10 nominal exchange rates according to conventional wisdom industrial country floating exchange rates contain unit roots sur tests on panels of monthly group of ten g 10 log nominal rates reject the null of unit roots for various samples over the current float with significance levels from 0 5 to 15 on average in out of sample forecasts mean reversion models beat random walks significantly in some forecast periods for monthly data the range of expected usd dem appreciation rates exceeds 15 per year in the mean reversion model mean reversion places strong restrictions on international models over the sample period the g 10 had to run monetary policies consistent with stable long run nominal rates

performance pricing in bank debt contracts abstract performance pricing links bank debt interest rate spreads to a borrower s performance via two options interest decreasing performance pricing reduces spreads if credit quality improves it is more common when prepayment is more likely or costly and when adverse selection costs are higher and is less common when multiple performance measures better predict credit quality interest increasing performance pricing increases spreads if credit quality deteriorates it is more common when lenders reduce interest rates to add this provision when downgrades are more likely and when moral hazard costs are higher we find lower spreads for contracts with interest increasing performance pricing

consumption savings decisions with quasi geometric discounting we study the consumption savings problem of an infinitely lived rational consumer who has time inconsistent preferences in the form of quasi geometric discounting the consumer operates a weakly concave production function and must simply divide current resources into current consumption and savings there is no uncertainty a solution to the consumer s problem is a subgame perfect equilibrium of a dynamic game between the consumer s successive selves we show that this game has a continuum of equilibria in stationary markov strategies not only is the stationary point of the consumer s asset holdings indeterminate but each stationary point has a continuum of dynamic paths converging to it the savings policy rules underlying these dynamic paths are step functions

pricing growth indexed bonds abstract growth indexed bonds have been suggested as a way of reducing the procyclicality of emerging market countries fiscal policies and the likelihood of costly debt crises investor attitude surveys suggest that pricing difficulties are seen as a considerable obstacle in an effort to reduce such concerns this article presents a simple way of pricing growth indexed bonds as a pleasant by product the analysis tracks the quantitative implications of an increase in the share of growth indexed bonds in total debt measuring the ensuing decline in the probability of default and the reduction in the spreads at which standard bonds can be issued

risk sharing through capital gains we estimate channels of international risk sharing between european monetary union emu european union and other oecd countries 1992 2007 we focus on risk sharing through savings factor income flows and capital gains risk sharing through factor income and capital gains was close to zero before 1999 but has increased since then risk sharing from capital gains at about 6 is higher than risk sharing from factor income flows for european union countries and oecd countries risk sharing from factor income flows is higher for euro zone countries at 14 reflecting increased international asset and liability holdings in the euro area on examine les canaux de partage international du risque entre l union monetaire europeenne l union europeenne et les autres pays de l ocde 1992 2007 on se concentre sur le partage du risque via les epargnes les flux de revenus des facteurs et les gains de capitaux le partage du risque via les revenus des facteurs et les gains de capitaux a ete presque nul avant 1999 mais s est accru depuis le partage du risque via les gains de capitaux a peu pres 6 est plus grand que le partage du risque via les flux de revenus des facteurs pour les pays de l union europeenne et les pays de l ocde le partage du risque vis les flux de revenus des facteurs est plus eleve pour l euro zone a quelques 14 refletant le fait que les actifs et passifs internationaux detenus dans la zone euro se sont accrus

sovereign default and maturity choice abstract this study develops a novel model of endogenous sovereign debt maturity that rationalizes various stylized facts about debt maturity and the yield spread curve first sovereign debt duration and maturity generally exceed one year and co move positively with the business cycle second sovereign yield spread curves are usually non linear and upward sloped and may become non monotonic and inverted during a period of high credit market stress such as a default episode finally output volatility impatience risk aversion and especially sudden stops are key determinants of maturity both in our model and in the data

real interest rates and inflation an ex ante empirical analysis we develop a method of measuring ex ante real interest rates using prices of index and nominal bonds employing this method and newly available data we directly test the fisher hypothesis that the real rate of interest is independent of inflation expectations we find a negative correlation between ex ante real interest rates and expected inflation this contradicts the fisher hypothesis but is consistent with the theories of mundell and tobin darby and feldstein and stulz we also find that nominal interest rates include an inflation risk premium that is positively related to a proxy for inflation uncertainty

the stock of external sovereign debt can we take the data at face value abstract the stock of sovereign debt is typically measured at face value defined as the undiscounted sum of future principal repayments face values are misleading when debts are issued with different contractual forms or maturities in this paper we construct alternative measures of the stock of external sovereign debt for 100 developing countries from 1979 through 2006 that correct for differences in contractual form and maturity we show that our alternative measures 1 paint a very different quantitative and in some cases also qualitative picture of the stock of developing country external sovereign debt 2 often invert rankings of indebtedness across countries which historically defined eligibility for debt forgiveness 3 indicate that the empirical performance of the benchmark quantitative model of sovereign debt deteriorates by roughly 50 once model consistent measures of debt are used 4 show how the spread of aggregation clauses in debt contracts that award creditors voting power in proportion to the contractual face value may introduce inefficiencies into the process of restructuring sovereign debts and 5 illustrate how countries have manipulated their debt issuance to meet fiscal targets written in terms of face values

long duration bonds and sovereign defaults abstract this paper extends the baseline framework used in recent quantitative studies of sovereign default by assuming that the government can borrow using long duration bonds this contrasts with previous studies which assume the government can borrow using bonds that mature after one quarter we show that when we assume that the government issues bonds with a duration similar to the average duration of sovereign bonds in emerging economies the model generates an interest rate that is substantially higher and more volatile than the one obtained assuming one quarter bonds this narrows the gap between the predictions of the model and the data which indicates that the introduction of long duration bonds may be a useful tool for future research about emerging economies our analysis is also relevant for the study of other credit markets

optimal fiscal and monetary policy under sticky prices this paper studies optimal fiscal and monetary policy under sticky product prices the theoretical framework is a stochastic production economy without capital the government finances an exogenous stream of purchases by levying distortionary income taxes printing money and issuing one period nominally risk free bonds the main findings of the paper are first for a miniscule degree of price stickiness i e many times below available empirical estimates the optimal volatility of inflation is near zero this result stands in stark contrast with the high volatility of inflation implied by the ramsey allocation when prices are flexible the finding is in line with a recent body of work on optimal monetary policy under nominal rigidities that ignores the role of optimal fiscal policy second even small deviations from full price flexibility induce near random walk behavior in government debt and tax rates third sluggish price adjustment raises the average nominal interest rate above the one called for by the friedman rule finally an interest rate feedback rule whereby the nominal interest rate depends on inflation and output fits well the data emanating from the ramsey economy however the fitted rule is not of the taylor type for the implied inflation coefficient is less than one and close to zero and the output coefficient is negative jel classification e52 e61 e63

optimal fiscal and monetary policy with sticky prices in this paper i consider the role of state contingent inflation as a fiscal shock absorber in an economy with nominal rigidities i study the ramsey equilibrium in a monetary model with distortionary taxation nominal non state contingent debt and sticky prices with sticky prices the ramsey planner must balance the shock absorbing benefits of state contingent inflation against the associated resource misallocation costs for government spending processes resembling post war experience introducing sticky prices generates striking departures in optimal policy from the case with flexible prices for even small degrees of price rigidity optimal policy displays very little volatility in inflation tax rates display greater volatility compared to the model with flexible prices with sticky prices tax rates and real government debt exhibit behavior similar to a random walk for government spending processes resembling periods of intermittent war and peace optimal policy displays extreme inflation volatility even when the degree of price rigidity is large as the variability in government spending increases smoothing tax distortions across states of nature becomes increasingly important and the shock absorber role of inflation is accentuated

the treasury yield curve as a cointegrated system this paper examines the temporal relationship between interest rates on treasury securities ranging in maturity from three months to 30 years we find strong empirical support that the seven treasury rates selected are cointegrated a conclusion that is insensitive to the normalization chosen in particular the hypothesis of noncointegration is rejeeted decisively regardless of the rate selected as the dependent variable in the cointegrating equation to determine whether this information can be used to improve forecasts of treasury rates the seven rates are forecasted with a corresponding erroreorrection model that is shown to outperform an augmented var model that ignores the cointegration of the rates the results are consistent with the belief that arbitrage limits the extent to which rates on different maturities of a given security diverge in addition the results confirm the appropriateness of imposing a common stochastic process for interest rates in equilibrium models of the term structure

cointegration and the us term structure abstract using the maximum likelihood analysis of cointegration developed by johansen 1988 1991 we test the cointegration implications of the expectations hypothesis of the term structure on a sample of us pure discount yields by using this approach we are able to analyze systems of more than two interest rates simultaneously as opposed to most previous studies which examine interest rates only in pairs one of the main results is that for the period 1952 1987 the cointegration implications generally seem to hold

news sovereign debt maturity and default risk abstract leading into a debt crisis interest rate spreads on sovereign debt rise before the economy experiences a decline in productivity suggesting that news about future economic developments may play an important role in these episodes an empirical var estimation shows that a news shock has a larger contemporaneous impact on sovereign credit spreads than a comparable shock to labor productivity a quantitative model of news and sovereign debt default with endogenous maturity choice generates impulse responses and a variance decomposition similar to the empirical var estimates the dynamics of the economy after a bad news shock share some features of a productivity shock and some features of sudden stop events however unlike during sudden stop episodes long term debt does not shield the country from bad news shocks and it may even exacerbate default risk finally an increase in the precision of news allows the government to improve its debt maturity management especially during periods of high stress in credit markets and thus face lower yield spreads while increasing the amount of debt

a time series analysis of representative agent models of consumption andleisure choice under uncertainty this paper investigates empirically a model of aggregate consumption and leisure decisions in which utility from goods and leisure is nontime separable the nonseparability of preferences accommodates intertemporal substitution or complementarity of leisure and thereby affects the comovements in aggregate compensation and hours worked these cross relations are examined empirically using postwar monthly u s data on quantities real wages and the real return on the one month treasury bill the estimated values of the parameters governing preferences differ significantly from the values assumed in several studies of real business models several possible explanations of these discrepancies are discussed

non defaultable debt and sovereign risk abstract we quantify gains from introducing limited financing through non defaultable debt into a model of equilibrium sovereign risk for an initial sovereign spread of 4 2 introducing the possibility of issuing non defaultable debt for up to 10 of aggregate income reduces immediately the spread to 1 5 and implies a welfare gain equivalent to a permanent consumption increase of 0 8 nevertheless the spread reduction achieved by the introduction of non defaultable debt is short lived our findings shed light on different aspects of proposals to introduce common euro area sovereign bonds that could be virtually non defaultable

sovereign and private default risks over the business cycle abstract sovereign debt crises are often accompanied by deep recessions with sharp declines in external credit to the private sector in a sample of emerging economies we find that both sovereign and private interest rate spreads are countercyclical this paper presents a model of a small open economy that accounts for these empirical regularities it includes private firms which finance a fraction of imports by external debt and are subject to idiosyncratic productivity risk and a government which borrows internationally and taxes firms to finance public expenditures the model gives rise to endogenous private and sovereign interest rate spreads and a dynamic feedback mechanism between sovereign and private default risks through the endogenous response of fiscal policy to adverse productivity shocks

price stability with imperfect financial integration this paper studies whether the international monetary system can be affected by asymmetries in the cross country positions in the international financial markets i e the fact that some countries are large debtors while others are creditors an important channel that is explored is the interaction between international risk sharing and the stabilization role of monetary policy in each country the main finding is that the welfare costs of incomplete markets and the gains of deviating from a policy of price stability are increasing with the cross country asymmetries in the initial net international positions and in particular they become nonnegligible when the persistence of the shocks increases 1 of a permanent shift in steady state consumption for the welfare costs of incomplete markets and 0 2 for the gains of deviating from a policy of price stability when global imbalances become larger optimal monetary policy requires an increase in the volatilities of the real returns on assets and in particular of the nominal interest rates which should happen to be more correlated across countries

optimal timing of decisions a general theory based on continuation values abstract by extending a methodology dating back to jovanovic 1982 we develop a comprehensive theory of optimal timing of decisions based on continuation value functions and operators that act on them rewards can be bounded or unbounded one advantage of this approach over standard bellman methods is that continuation value functions are smoother than value functions another is that for a range of problems the continuation value function exists in a lower dimensional space than the value function we exploit these advantages to obtain a range of new results on optimality optimal behavior and efficient computation

mean reversion in interest rates new evidence from a panel of oecd countries previous studies show that the standard univariate unit root tests cannot reject the hypothesis that interest rates follow integrated processes in this paper the authors pool interest rate data of twelve oecd countries and implement a multivariate test it is found that the unit root hypothesis can be decisively rejected copyright 1996 by ohio state university press

sovereign default resolution through maturity extension abstract sovereign default episodes are resolved by restructuring the debt through renegotiations and implemented by bond swaps and resumption of debt service payments this process provides debt relief for the sovereign and partially compensates lenders for their losses in the data the bulk of such debt relief is implemented by extending the maturity of the debt rather than changing its face value we augment a standard maturity choice model with a post default renegotiation phase and study whether it can replicate this observed maturity extension the model is successful in generating this and other key features of renegotiations and maturity choice but critically only when we assume that sovereigns continue to be excluded temporarily from financial markets after renegotiation consistent with the observation that countries do not immediately resume borrowing in contrast a version of the model where market access is restored promptly features a counterfactual reduction in maturity a puzzle for the standard model

on real interest rate dynamics and regime switching abstract we find evidence of regime switching dynamics in the usa and the uk real interest rates over the period 1881 2003 for the uk there is a regime in which the real interest rate displays a relatively stronger mean reversion and a regime in which it displays a relatively weaker mean reversion the former regime is characterized by a relatively larger error in the estimation of the reversion parameter and higher volatility for the usa the two regimes differ in volatility the probability of transition from one regime to another is found to be significantly related to the inflation rate regime and to the political regime the results highlight the importance of regime switching in the dynamics of the real interest rate as well as the role of inflation and political regimes in explaining this switching

do stationary risk premia explain it all evidence from the term structure abstract predictable variations in excess returns have often been attributed to the presence of time varying risk premia in this paper we use an insight based upon new techniques from time series analysis to test whether stationary risk premia can alone explain the behavior of excess returns to long bonds relative to rolling over short rates surprisingly we reject this hypothesis using u s t bill returns we then show that either permanent shocks to the risk premia and or rationally anticipated shifts in the interest rate process could produce anomalous results

labor market distortions under sovereign debt default crises risk of sovereign debt default has frequently affected emerging market and developed economies such financial crisis are often accompanied with severe declines of employment that are hard to justify using a standard dynamic stochastic model in this paper i document that a labor wedge deteriorates substantially around swift reversals of current accounts or default episodes i propose and evaluate two different explanations for these movements by linking the wedges to changes in labor taxes and in the cost of working capital with these two features included a dynamic model of equilibrium default is able to replicate the behavior of the labor wedge observed in the data around financial crisis in the model higher interest rates are propagated into larger costs of hiring labor through the presence of working capital as an economy is hit with a stream of bad productivity shocks the incentives to default become stronger thus increasing the cost of debt this reduces firm demand for labor and generates a labor wedge a similar effect is obtained with a counter cyclical tax rate policy the model is used to shed light on the recent events of the euro area debt crisis and in particular of the greek default event

inflation stabilization and welfare the case of a distorted steady state this paper considers the appropriate stabilization objectives for monetary policy in a microfounded model with staggered price setting rotemberg and woodford 1997 and woodford 2002 have shown that under certain conditions a local approximation to the expected utility of the representative household in a model of this kind is related inversely to the expected discounted value of a conventional quadratic loss function in which each period s loss is a weighted average of squared deviations of inflation and an output gap measure from their optimal values zero however those derivations rely on an assumption of the existence of an output or employment subsidy that offsets the distortion due to the market power of monopolistically competitive price setters so that the steady state under a zero inflation policy involves an efficient level of output here we show how to dispense with this unappealing assumption so that a valid linear quadratic approximation to the optimal policy problem is possible even when the steady state is distorted to an arbitrary extent allowing for tax distortions as well as market power and when as a consequence it is necessary to take account of the effects of stabilization policy on the average level of output we again obtain a welfare theoretic loss function that involves both inflation and an appropriately defined output gap though the degree of distortion of the steady state affects both the weights on the two stabilization objectives and the definition of the welfare relevant output gap in the light of these results we reconsider the conditions under which complete price stability is optimal and find that they are more restrictive in the case of a distorted steady state we also consider the conditions under which pure randomization of monetary policy can be welfare improving and find that this is possible in the case of a sufficiently distorted steady state though the parameter values required are probably not empirically realistic

asset backed contracts and sovereign risk abstract a fundamental problem with sovereign default is the lack of a legal enforcement mechanism since the 1920s there have been an ongoing set of initiatives undertaken by the league of nations and the unctad to set international laws on borrowing and lending standards all of which have failed to address the unenforceability problem this paper proposes to use asset backed contracts where the usufruct of the asset transfers to the asset holder unlike conventional sovereign borrowing there are international laws governing asset backed contracts which allow the international assets of a country to be seized this paper exemplifies on the idea that asset backed contracts which are also widely practiced in islamic finance can provide a solution to unenforceable sovereign debt contracts the paper focuses specifically on argentina which has defaulted twice in 13 years if argentina had utilized asset backed contracts prior to its 2001 debt default it would have gained from the following advantages higher debt to gdp ratios larger welfare gains lower probability of default and thus lower borrowing costs

global cycles capital flows commodities and sovereign defaults 1815 2015 abstract capital flow and commodity cycles have long been connected with economic crises sparse historical data however has made it difficult to connect their timing we date turning points in global capital flows and commodity prices across two centuries and provide estimates from alternative data sources we then document a strong overlap between the ebb and flow of financial capital the commodity price super cycle and sovereign defaults since 1815 the results have implications for today as many emerging markets are facing a double bust in capital inflows and commodity prices making them vulnerable to crises

policies and impact an analysis of village level microfinance institutions this paper uses variation in policies and institutional characteristics to evaluate the impacts of village level microfinance institutions in rural thailand to identify impacts we use policies related to the successful unsuccessful provision of services as exogenous variation in effective financial intermediation we find that institutions particularly those with good policies can promote asset growth consumption smoothing and occupational mobility and can decrease moneylender reliance specifically cash lending institutions production credit groups and especially women s groups are successful in providing intermediation and its benefits to members while buffalo banks and rice banks are not the policies identified as important to intermediation and benefits the provision of savings services especially pledged savings accounts emergency services and training and advice surprisingly much publicized policies such as joint liability default consequences or repayment frequency had no measured impacts jel 012 016

benchmarking the expectations hypothesis of the interest rate term structure an analysis of cointegration vectors i test cointegration restrictions that are consistent with the expectations hypothesis of the term structure by employing the full information maximum likelihood methods developed by johansen yield curves appear to be the result of cointegration among interest rates the cointegration vectors that best describe the long term impact of interest rate levels on interest rate changes can often be written as linear combinations of interest rate spreads there is however difficulty in keeping short term yields in such a restricted cointegrated system with other interest rates short term speculative returns from long term bonds do not conform to the expectations hypothesis

are valuation effects desirable from a global perspective abstract recent studies have emphasized the role of valuation effects due to exchange rate movements in easing the process of adjustment of the external balance of a country this paper asks to what extent valuation effects are desirable from a global perspective as a mean to achieve an efficient allocation of resources in a frictionless world it is desirable to have large movements in prices and exchange rates but once a small degree of price rigidity is introduced not only should prices be stabilized but also the response of the exchange rate should be muted there is a minor role for valuation effects that depends both on the size and composition of assets and liabilities

barriers to investment in polarized societies i present a tractable dynamic model of political economy where disagreements about the composition of public spending result in implementation of short sighted policies the relative price of investment to consumption is excessively large in equilibrium due to over taxation investment rates are too low which slows down growth along the transition in the long run this results in output consumption and welfare being inefficiently low the larger is the degree of polarization the greater is the inefficiency political stability mitigates the effects of polarization by making the incumbent internalize the dynamic inefficiencies introduced by the choice of growth retarding policies

u s consumer bankruptcy choice the importance of general equilibrium effects abstract we study the implications of u s personal bankruptcy rules for resource allocation and welfare our analysis shows that general equilibrium considerations along with bankruptcy chapter choice and production matter crucially for the effects of policy reform contrary to previous work we find that completely eliminating bankruptcy provisions causes significant declines in output and welfare by reducing capital formation and labor input furthermore subjecting chapter 7 filers to means testing as suggested by recent legislative proposals would not improve upon current bankruptcy provisions and at best leave aggregate filings output and welfare unchanged however we do find that an alternative tightening of chapter 7 in the form of lower asset exemptions can increase economic efficiency

fiscal rules and government borrowing costs international evidence we find that the adoption of numerical fiscal rules reduces government borrowing costs in a sample of 101 advanced and developing countries for 1985 2010 we apply a variety of propensity score matching methods to address the self selection problem of policy adoption and find strong evidence that fiscal rules have large and significant treatment effects on lowering government borrowing costs in both international and domestic financial markets the results are robust to changes in country sample and alternative estimation methodology and are consistent with fiscal rules helping to build policy credibility by reducing the probability of default and the risk premium on government debt that compensates lenders for this possibility jel e43 g12 h60

sovereign debt maturity structure under asymmetric information abstract this paper studies the optimal choice of sovereign debt maturity when investors are unaware of the government s willingness to repay under a pooling equilibrium there is a wedge between the borrower s true default risk and the default risk priced in debt and its size differs with the maturity of debt safe borrowers tilt their debt maturity towards short term relative to the optimal choice under perfect information since long term debt pools more default risk that is not inherent to them risky borrowers mimic their behavior of safe borrowers to preclude the market from identifying their type in times of financial distress spreads increase and the default risk wedge of long term debt relative to short term debt increases which makes borrowers shorten their debt maturity data on bond issuances for a panel of countries show that consistent with the model maturities co vary negatively with spreads and that this co movement is stronger in those situations in which informational asymmetries are larger

the welfare loss from unstable inflation abstract the calvo price setting mechanism produces relative price dispersion among firms while the rotemberg model is consistent with a symmetric equilibrium nonetheless both models imply the same welfare costs of inflation and the same prescriptions for welfare maximizing central banks

the role of net foreign assets in a new keynesian small open economy model abstract this paper develops a small open economy sticky price model that determines a unique stable long run asset position for households as function of their incentive to anticipate or postpone consumption and labor effort across periods this is accomplished by adopting an overlapping generations structure in which new households with no assets enter the economy in each period the same characteristics of household behavior that determine long run assets are also important determinants of the model s responses to shocks stabilizing producer prices results in a milder recession following a drop in world demand than stabilizing consumer prices because it prevents the markup in the pricing of goods from increasing in addition given an initial foreign debt allowing consumer prices to rise causes a decrease in the ex post real interest rate on impact lowering the interest burden of the initial debt the differences across policy rules generated by the initial asset position are robust to changes in the latter as long as these are brought about by changes in parameter values that do not alter the fundamental characteristics of household and firm behavior that are also the key determinants of long run assets

default risk and risk averse international investors abstract this paper develops an endogenous default risk model for small open economies that interact with risk averse international investors whose preferences exhibit decreasing absolute risk aversion dara by incorporating risk averse investors who trade with an emerging economy the present model explains a larger proportion and volatility of the spread between sovereign bonds and riskless assets than the standard model with risk neutral investors the paper shows that if investors have dara preferences then the emerging economy s default risk capital flows and bond prices are a function not only of the fundamentals of the economy but also of the level of financial wealth and risk aversion of international investors in particular as investors become wealthier or less risk averse the emerging economy becomes less credit constrained as a result the emerging economy s default risk is lower and its bond prices and capital inflows are higher additionally with risk averse investors the risk premium in the asset prices of the sovereign countries can be decomposed into two components a base premium that compensates the investors for the probability of default and an excess premium that compensates them for taking the risk of default

a quantitative model of sovereign debt bailouts and conditionality in times of sovereign debt crises international financial institutions provide temporary financial support contingent on the implementation of specific macroeconomic policies this paper develops a model of sovereign debt and default with endogenous participation rates in bailout programs conditionality enters as a constraint on fiscal policy in the model the insurance character of bailouts generates incentives for debt accumulation quantitative results suggest that bailouts prevent sovereign defaults in the short run but may come at a cost of a greater default probability in the long run increasing the intensity of conditionality lowers the bailout participation rate and generates a hump shaped pattern of sovereign default risk

debt maturity without commitment i analyze how lack of commitment afiects the maturity structure of sovereign debt governments balance beneflts of default induced redistribution and costs due to income losses in the wake of a default their choice of short versus longterm debt afiects default and rollover decisions by subsequent policy makers the equilibrium maturity structure is shaped by revenue losses on inframarginal units of debt that re ect the price impact of these decisions the model predicts an interior maturity structure with positive gross positions and a shortening of the maturity structure when debt issuance is high output low or a cross default more likely these predictions are consistent with empirical evidence

are real gdp levels nonstationary evidence from panel data tests potential nonstationarity of important macroeconomic variables and unit root tests are now a standard procedure in empirical analyses while there are many findings of unit roots in macroeconomic variables using the popular augmented dickey and fuller 1979 test this test has low power against near unit root alternatives recently panel data procedures have been proposed as an avenue to increased power this paper applies panel unit root tests to international real gdp and real gdp per capita data the results overwhelmingly indicate that international real gdp and real gdp per capita levels are nonstationary

take the short route equilibrium default and debt maturity we study the interactions between sovereign debt default and maturity choice in a setting with limited commitment for repayment as well as future debt issuances our main finding is that under a wide range of conditions the sovereign should as long as default is not preferable remain passive in long term bond markets making payments and retiring long term bonds as they mature but never actively issuing or buying back such bonds the only active debt management margin is the short term bond market we show that any attempt to manipulate the existing maturity profile of outstanding long term bonds generates losses as bond prices move against the sovereign our results hold regardless of the shape of the yield curve the yield curve captures the average costs of financing at different maturities but is misleading regarding the marginal costs

debt dilution and sovereign default risk we measure the effects of debt dilution on sovereign default risk and study debt covenants that could mitigate these effects we calibrate a baseline model with endogenous debt duration and default risk in which debt can be diluted using data from spain we find that debt dilution accounts for 78 percent of the default risk in the baseline economy and that eliminating dilution increases the optimal duration of sovereign debt by almost 2 years eliminating dilution also increases consumption volatility but still produces welfare gains the debt covenants we study could help enforcing fiscal rules

beliefs and long maturity sovereign debt abstract a novel form of strategic complementarities is explored in a standard quantitative model of long maturity sovereign debt discrepancies in long run beliefs dilute current prices differently negative long run beliefs become self fulfilling if the sovereign optimally borrows more and defaults more frequently in the face of worse prices a strong curvature in the flow utility is an important ingredient in generating this response the intuition bears out both through a multiplicity of markov equilibria and in sunspot equilibria that mimic trigger strategies in repeated games in the benchmark model average spreads are roughly 67 higher 200 basis points and debt to gdp ratios are roughly 9 higher 5 percentage points when beliefs are pessimistic the model also reveals limitations to third party coordination of expectations as a policy tool

a contraction for sovereign debt models abstract using a dual representation we show that the markov equilibria of the one period bond eaton and gersovitz 1981 incomplete markets sovereign debt model can be represented as a fixed point of a contraction mapping providing a new proof of the uniqueness and existence of equilibrium in the benchmark sovereign debt model the arguments can be extended to incorporate re entry probabilities after default when the shock process is iid our representation of the equilibrium bears many similarities to an optimal contracting problem we use this to argue that commitment to budget rules has no value to a benevolent government we show how the introduction of long term bonds breaks the link to the constrained planning problem

sovereign default private sector creditors and the ifis abstract the data reveal that emerging market sovereign borrowing from international financial institutions ifis is small intermittent and countercyclical compared to that from private sector creditors the ifi loan contracts offered to sovereigns differ from the private ones in that they are more enforceable and have conditionality arrangements attached to them taking these contractual differences as given this paper builds a quantitative model of a sovereign borrower and argues that better enforceability of ifi loan contracts is the main institutional feature that explains the size and cyclicality while conditionality accounts for the intermittency of borrowing from the ifis

sovereign defaults information investment and credit abstract why would a sovereign government immune from bankruptcy procedures and with few assets that could be seized in the event of a default ever repay foreign creditors and correspondingly why do foreign creditors lend to sovereigns this paper finds general conditions under which even in the absence of sanctions lending to sovereigns can emerge in a single shot game furthermore it shows that positive borrowing can be sustained both in pooling and separating equilibria in this way it makes clear that neither sanctions nor reputation considerations the two classical explanations are necessary to enforce repayment information revelation is the crucial mechanism for these results the repayment default decision is interpreted as a signal used by the government to communicate information to domestic and foreign agents about the fundamentals of the economy governments repay to affect agents expectations about them a default through its effect on expectations about fundamentals can generate a decline in foreign and domestic investment and a credit crunch in domestic credit markets governments repay to avoid these costs but may default in equilibrium when hit by a negative shock

sovereign debt renegotiation and credit default swaps abstract a credit default swap cds contract provides insurance against default this paper incorporates the contract into a sovereign default model and demonstrates that the existence of a cds market results in lower default probability higher debt levels and lower financing costs for the country uncertainty over the insurance payout when the debt is renegotiated explains why in the data as the output declines the cds spread becomes lower than the bond spread finally my results show that the 2012 cds naked ban that decreased the levels of cds for european countries is a welfare reducing policy

self fulfilling debt crises a quantitative analysis this paper investigates the role of self fulfilling expectations in sovereign bond markets we consider a model of sovereign borrowing featuring endogenous debt maturity risk averse lenders and self fulfilling crises a la cole and kehoe 2000 in this environment interest rate spreads are driven by both fundamental and nonfundamental risk these two sources of risk have contrasting implications for the maturity structure of debt chosen by the government therefore they can be indirectly inferred by tracking the evolution of debt maturity we fit the model to italian data and find that nonfundamental risk played a limited role during the 2008 2012 crisis

heterogeneous borrowers in quantitative models of sovereign default we extend the model used in recent quantitative studies of sovereign default allowing policymakers of different types to stochastically alternate in power we show that a default episode may be triggered by a change in the type of policymaker in office and that such a default is likely to occur only if there is enough political stability and if policymakers encounter poor economic conditions under high political stability political turnover enables the model to generate a weaker correlation between economic conditions and default decisions a higher and more volatile spread and lower borrowing levels after a default episode

productivity shocks stabilization policies and the dynamics of net foreign assets in this paper we investigate the role of macroeconomic stabilization policies for the international transmission of productivity shocks and their eects on the external sector we develop a two country stochastic dynamic new keynesian perpetual youth model of the business cycle with incomplete international nancial markets our olg structure implies stationary net foreign asset dynamics and allows for a thorough analysis of the interaction of monetary policy with non balanced budget scal policy we derive the dynamic and cyclical properties of scal decit feedback rules and their implications for net foreign assets dynamics our results imply that the degree of scal discipline i e the extent to which the scal rule responds to debt dynamics is crucial for the dynamics of net foreign assets we show that under a counter cyclical scal rule with low

a seniority arrangement for sovereign debt a sovereign s inability to commit to a course of action regarding future borrowing and default behavior makes long term debt costly the problem of debt dilution one mechanism to mitigate this problem is the inclusion of a seniority clause in debt contracts in the event of default creditors are to be paid off in the order in which they lent the absolute priority or first in time rule in this paper we propose a modification of the absolute priority rule suited to sovereign debts contracts and analyze its positive and normative implications within a quantitatively realistic model of sovereign debt and default jel e32 e44 f34 g15 h63 o16 o19

global factors and emerging market spreads this paper shows that a large fraction of the variability of emerging market bond spreads is explained by the evolution of global factors such as risk appetite as reflected in the spread of high yield corporate bonds in developed markets global liquidity measured by the international interest rates and contagion from systemic events like the russian default this link has remained relatively stable over the history of the emerging market class is robust to the inclusion of country specific factors and helps provide accurate long run predictions overall the results highlight the critical role played by exogenous factors in the evolution of the borrowing cost faced by emerging economies

commodity price risk management and fiscal policy in a sovereign default model abstract commodity prices are an important driver of fiscal policy and the business cycle in many developing and emerging market economies we analyze a dynamic stochastic small open economy model of sovereign default featuring endogenous fiscal policy and stochastic commodity revenues the model accounts for a positive correlation of commodity revenues with government expenditures and a negative correlation with tax rates we quantitatively document the extent to which the utilization of different financial hedging instruments by the government contributes to lowering the volatility of different macroeconomic variables and their correlation with commodity revenues an event analysis illustrates how financial hedging instruments moderate fiscal adjustment in response to significant falls in the price of commodities we evaluate the conditional and unconditional welfare gains for the representative household generated by financial derivatives and commodity indexed bonds

the case for gdp indexed bonds gds indexed bonds this paper seeks to revive the case for countries to insure against economic growth slowdowns by issuing bonds indexed to the rate of growth of gdp we show that gdp indexed bonds could provide substantial benefits in reducing the likelihood of default crises and allowing countries to avoid pro cyclical fiscal policies we simulate the effects of gdp indexed bonds under different assumptions about fiscal policy reaction functions and their output effects and find that they could substantially reduce the likelihood of debt gdp paths becoming explosive the insurance premium would likely be small because cross country comovement of gdp growth rates is low and cross country gdp growth risk is thus largely diversifiable for an investor holding a portfolio of gdp indexed bonds potential obstacles to the emergence of a market for these bonds include the verifiability of gdp data the trade off between insurance and moral hazard and the need for liquidity theory and past experience suggest that financial innovation often requires official intervention and its timing and form are difficult to predict we discuss institutional fixes and suggest an approach for attempting to start up a market eduardo borensztein and paolo mauro

default settlement and signalling lending resumption in a reputational model of sovereign debt this paper develops a simple model of sovereign debt in which defaulting nations are excluded from capital markets and regain access by making partial repayments this implication of the model is consistent with the historical evidence that defaulting countries return to international loan markets soon after a settlement but after varying periods of exclusion copyright 1995 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

commodity trade and international risk sharing how much do financial markets matter abstract this paper evaluates the social gains from international risk sharing in some simple general equilibrium models with output uncertainty a simulation model calibrated to selected moments of u s and japanese data estimates the incremental loss from a ban on international portfolio diversification to be on the order of 0 20 percent of output per year even the theoretical gains from asset trade may disappear under alternative sets of assumptions on preferences and technology the paper argues that the small magnitude of potential trade gains may help explain the apparently inconsistent findings of empirical studies on the degree of international capital mobility

the fisher effect and the term structure of interest rates tests of cointegration the literature on the fisher effect has ignored the potential relationship between inflation and long term interest rates using an expectations model of the term structure of interest rates the authors establish the conditions under which innovations in short term inflation will be transmitted to long term as well as short term interest rates cointegration tests find support for both the fisher effect and the expectations theory of the term structure copyright 1993 by mit press

discretionary monetary and fiscal policy with endogenous sovereign risk abstract how does the presence of sovereign risk affect the conduct of public policy to answer this question this paper studies optimal monetary and fiscal policy without commitment for a model economy with nominal public debt and strategic sovereign default compared to an economy without the possibility of default economies with sovereign risk experience more volatile interest rates which impedes the government s ability to smooth tax rates across states risk of default also limits public debt accumulation reducing the government s incentive to use surprise inflation on average when calibrated to the united states the model predicts that a counterfactual increase in the average annual default probability from 0 to 1 lowers average inflation by 33 raises the standard deviation of inflation by 18 and increases the standard deviation of the labor income tax by 73 the transmission of exogenous shocks to real aggregate quantities is however almost unaffected by the possibility of default for example the presence of sovereign risk would increase the standard deviation of log real gdp by less than 1 in the experiment above similarly the welfare consequences of sovereign risk are found to be of negligible size as well

new directions for stochastic open economy models the paper develops a simple stochastic new open economy macroeconomic model based on sticky nominal wages explicit solution of the wage setting problem under uncertainty allows one to analyze the effects of the monetary regime on welfare expected output and the expected terms of trade despite the potential interplay between imperfections due to sticky wages and monopoly the optimal monetary policy rule has a closed form solution to motivate our model we show that observed correlations between terms of trade and exchange rates are more consistent with our traditional assumptions about nominal rigidities than with a popular alternative based on local currency pricing 2000 elsevier science b v all rights reserved

consumer bankruptcy a fresh start consumer bankruptcy provides partial insurance against bad luck but by driving up interest rates makes life cycle smoothing more difficult we argue that to assess this trade off one needs a quantitative model of consumer bankruptcy with three key features life cycle component idiosyncratic earnings uncertainty and expense uncertainty exogenous negative shocks to household balance sheets we find that transitory and persistent earnings shocks have very different implications for evaluating bankruptcy rules more persistent shocks make the bankruptcy option more desirable larger transitory shocks have the opposite effect our findings suggest the current us bankruptcy system may be desirable for reasonable parameter values jel d14 d91 k35

welfare implications of the bankruptcy reform act of 1999 abstract in recent years personal bankruptcy has become an important issue to consumers creditors and legislators alike over 40 billion dollars of unsecured debt were discharged in 1998 by 1 44 million households these losses have led legislators to propose a variety of changes in bankruptcy law the most important and recent of which is the bankruptcy reform act of 1999 ba99 i develop a dynamic stochastic general equilibrium model of personal bankruptcy to investigate the trade off between the consumption smoothing role of bankruptcy and the interest rate and deadweight costs it imposes i find that stringent means tests would reduce filing rates only slightly and would have only modest welfare consequences on the other hand the elimination of bankruptcy altogether is found to have substantial benefits this result is robust to income shock persistence and to stringency in the application of means tests

efficient sovereign default in this article i show that the key aspects of sovereign debt crises can be rationalized as part of the efficient risk sharing arrangement between a sovereign borrower and foreign lenders in a production economy with informational and commitment frictions the constrained efficient allocation involves ex post inefficient outcomes that resemble sovereign default episodes in the data and can be implemented with non contingent defaultable bonds and active maturity management defaults and periods of temporary exclusion from international credit markets happen along the equilibrium path and are essential to supporting the efficient allocation furthermore during debt crises the maturity composition of debt shifts towards short term debt and the term premium inverts as in the data

financial integration and international risk sharing abstract conventional wisdom suggests that financial liberalization can help countries insure against idiosyncratic risk there is little evidence however that countries have increased risk sharing despite widespread financial liberalization we show that the key to understanding this puzzling observation is that conventional wisdom assumes frictionless international financial markets while actual markets are far from frictionless financial contracts are incomplete and contract enforceability is limited when countries remove official capital controls default risk is still present as an implicit barrier to capital flows if default risk were eliminated capital flows would be six times greater and international risk sharing would increase substantially

a tale of two effects abstract this paper investigates the relationship between nominal interest rates and prices using nearly two centuries of data from ten industrial countries both a positive relationship between interest rates and price levels that is a positive gibson effect and a negative relationship between interest rates and subsequent price changes that is a negative fama fisher effect prevailed until world war i we propose a simple explanation wherein this doubly paradoxical juxtaposition of effects arises when money is supplied inelastically and prices are flexible this double paradox disappeared after world war ii when economies became mostly characterized by elastic money and sticky prices during that period a positive fama fisher effect emerged while the gibson effect largely dissipated

monetary policy in the open economy revisited the case for exchange rate flexibility restored abstract this paper revisits the sticky price pricing to market model of devereux and engel devereux m b engel c 2003 monetary policy in the open economy revisited price setting and exchange rate flexibility review of economic studies 70 4 765 783 in which fixed exchange rates are optimal even in the face of country specific nonmonetary shocks we show that this result hinges critically on the devereux engel model s prediction that international consumption levels are perfectly synchronized under flexible prices realistic modifications of the model that produce nonsynchronous consumption movements such as the presence of nontraded goods upset the fixed exchange rate prescription even in the absence of an expenditure switching role of exchange rate changes

unit roots and persistence in the nominal interest rate a confirmatory analysis applied to the oecd this paper investigates the stochastic properties of long term and short term nominal interest rates for the oecd over the post war era for that purpose we employ univariate unit root tests as well as panel unit root and stationarity tests that explicitly allow for cross sectional dependence overall we find overwhelming evidence that the nominal interest rate contains a unit root which may be driven by a stochastic common factor the computation of half lives through impulse response functions also points to a high degree of persistence this has important implications for the cointegration analysis of the fisher equation the uncovered interest parity and the term structure jel classification

an analysis of inflation and interest rates new panel unit root results in the presence of structural breaks abstract this paper investigates the order of integration of inflation and interest rates in a panel of 19 countries the results show that once multiple endogenous breaks are allowed for and appropriate critical values are used the series appear to be i 0

sovereign debt restructurings preemptive or post default sovereign debt restructurings can be implemented preemptively prior to a payment default we code a comprehensive new dataset and nd that preemptive restructurings i are frequent 38 of all deals 1978 2010 ii have lower haircuts iii are quicker to negotiate and iv see lower output losses to rationalize these stylized facts we build a quantitative sovereign debt model that incorporates preemptive and post default renegotiations the model improves the t with the data and explains the sovereign s optimal choice preemptive restructurings occur when default risk is high ex ante while defaults occur after unexpected bad shocks empirical evidence supports these predictions jel f34 f41 h63

why do emerging economies borrow short term the authors argue that emerging economies borrow short term due to the high risk premium charged by international capital markets on long term debt they first present a model where the debt maturity structure is the outcome of a risk sharing problem between the government and bondholders by issuing long term debt the government lowers the probability of a liquidity crisis transferring risk to bondholders in equilibrium this risk is reflected in a higher risk premium and borrowing cost therefore the government faces a tradeoff between safer long term borrowing and cheaper short term debt second the authors construct a new database of sovereign bond prices and issuance they show that emerging economies pay a positive term premium a higher risk premium on long term bonds than on short term bonds during crises the term premium increases with issuance shifting toward shorter maturities this suggests that changes in bondholders risk aversion are important to understand emerging market crises

the role of intermediate goods in international monetary cooperation abstract this paper investigates the implications of intermediate goods for optimal monetary policy in open economies and particularly focuses on the welfare gains that result from monetary cooperation in a relatively standard two country dynamic stochastic general equilibrium model with input output relations this paper demonstrates that introducing intermediate goods can amplify the welfare gains caused by cost push shocks by an order of magnitude larger a detailed analysis of equilibrium dynamics highlights a new channel that is absent in the previous literature non cooperative central banks respond differently to shocks in the intermediate goods market versus shocks in the final goods market even if these shocks generate the same distortions when the two central banks cooperate furthermore it is demonstrated that increasing the degree of openness in the intermediate goods market can reduce the welfare gains from monetary cooperation this casts doubt on whether the recent trend in international economic integration justifies the potential need for international monetary cooperation

lending constraints real estate prices and business cycles in emerging economies abstract we investigate a small open economy with constraints in both the domestic and the international credit market the informational opaqueness of the domestic market hinders foreign lenders activity so that entrepreneurs face looser borrowing constraints vis a vis domestic financiers however limited capitalization constrains domestic lenders calibrating the model to data from argentina we find that the interaction between lending and borrowing constraints is a channel through which real interest rate shocks generate fluctuations in output real estate prices and consumption external financial liberalization increases volatility and affects welfare more than domestic liberalization but also mitigates the destabilizing impact of domestic deregulation

income inequality and sovereign default abstract in this paper we study how income inequality matters for government borrowing and default decisions we extend a standard endogenous sovereign debt default model to allow for heterogeneous agents and stochastic variability in the dispersion of income we calibrate the model to match a number of stylized facts for argentina we show that i rising income inequality within a country increases the probability of default significantly ii the effect of output shocks is larger than the effect of inequality shocks iii the joint effect of these two shocks can generate a high default probability consistent with the argentine data iv the model can match the high volatility of consumption by the poor relative to the rich and v more progressive income taxes lead to lower default risk

sovereign default interest rates and political uncertainty in emerging markets abstract a large body of the empirical literature shows that high turnover rates length of tenure of policymakers and the degree of conflict within a country affects sovereign spreads debt and default rates we help to rationalize such claims by including these political features in a dynamic stochastic small open economy model of sovereign debt and default in this way we offer a complementary approach to the econometric analyses in the literature consistent with the data the quantitative analysis shows that politically unstable and more polarized economies experience higher default rates and larger level and volatility of sovereign interest rate spreads

creditors losses versus debt relief results from a decade of sovereign debt crises this paper computes debt relief and investor losses associated with the major emerging market defaults and debt restructurings of the 1998 2005 period investor losses ranged from 13 to 75 based on comparing the market value of the new debt with the net present value of the old debt evaluated at the sovereign yield immediately following the debt exchange however the net present value of debt relief from a country perspective calculated using estimated country borrowing rates in normal times was typically lower in many cases countries could have lowered their remaining debt burdens for given investor losses by making their debt restructuring offers more front loaded the fact that they did not do so suggests that debtor countries did not expect to enjoy stable access to international credit markets even outside the typical exclusion period following a default jel f34