walking down wall street with a tablet a survey of stock market predictions using the web a blindfolded chimpanzee throwing darts at the wall street journal could select a portfolio that would do as well as the stock market experts malkiel 2003 the efficient market hypothesis and its critics journal of economic perspectives 17 1 59 82 however what if this chimpanzee could browse the internet before throwing any darts in this paper we ask whether online news has any influence on the financial market and we also investigate how much influence it has we explore the burgeoning literature on the predictability of financial movements using online information and report its mixed findings in addition we collate the efforts of various disciplines including economics text mining sentiment analysis and machine learning and we offer suggestions for future research

endogenous trading constraints with incomplete asset markets abstract this paper endogenizes the borrowing constraints on capital in a production economy with incomplete markets we find that these limits get looser with income a property that is consistent with us data on credit limits the framework with endogenous limits is then used to study the effects of a revenue neutral tax reform that eliminates capital income taxes our results illustrate that it is very important to take into account the effects of tax policies on the limits throughout the transition these effects can be big enough to change the overall conclusion about the desirability of a tax reform

recent developments in consumer credit and default literature this survey discusses recent contributions to the quantitative literature on unsecured consumer debt and default and some ongoing challenges for the literature key topics include the sources of the rise in personal bankruptcies the importance of asymmetric information and the effects of developments in information technologies on consumer credit markets delinquency and informal bankruptcy debt collection and restructuring of distressed debt the cyclical behavior of consumer debt and default and the insurance role of household debt implications for welfare analysis and policy design are discussed several theoretical contributions and approaches to modeling the consumer credit markets are also highlighted

wisdom of crowds the value of stock opinions transmitted through social media social media has become a popular venue for individuals to share the results of their own analysis on financial securities this paper investigates the extent to which investor opinions transmitted through social media predict future stock returns and earnings surprises we conduct textual analysis of articles published on one of the most popular social media platforms for investors in the united states we also consider the readers perspective as inferred via commentaries written in response to these articles we find that the views expressed in both articles and commentaries predict future stock returns and earnings surprises

default and aggregate income abstract this paper studies how default varies with aggregate income we analyze a model in which optimal contracts enable risk sharing of privately observed idiosyncratic income by allowing for default default provisions allow agents with low idiosyncratic income realizations to repay less and thus provide insurance default penalties ensure that only these agents default we show that default can occur under the optimal contract and that default provisions vary with aggregate income we provide conditions such that both the amount of default and default penalties vary countercyclically with aggregate income and show that the default rate can be discontinuous

securitized markets international capital flows and global welfare we study the effect of collateralized lending and securitization on the global supply of securitized assets welfare and international net and gross capital flows in a two country general equilibrium model with idiosyncratic investment risk the financial sectors in the two countries home and foreign differ by the collateral requirement for investment loans with home requiring lower margins in autarky home endogenously supplies more assets and enables more risk sharing upon financial integration capital flows from foreign to home leading to lower interest rates and an increase in the global supply of assets foreign enjoys substantial welfare gains through better risk sharing and portfolio reallocation while the welfare experience for home is ambiguous gross capital flows arise when agents face aggregate shocks to the expected payoff to investment projects but can collapse when shocks concern the variance of returns

default and punishment in general equilibrium we extend the standard model of general equilibrium with incomplete markets to allow for default and punishment by thinking of assets as pools the equilibrating variables include expected delivery rates along with the usual prices of assets and commodities by reinterpreting the variables our model encompasses a broad range of adverse selection and signalling phenomena in a perfectly competitive general equilibrium framework perfect competition eliminates the need for lenders to compute how the size of their loan or the price they quote might affect default rates it also makes for a simple equilibrium refinement which we propose in order to rule out irrational pessimism about deliveries of untraded assets we show that refined equilibrium always exists in our model and that default in conjunction with refinement opens the door to a theory of endogenous assets the market chooses the promises default penalties and quantity constraints of actively traded assets

dynamic financial constraints distinguishing mechanism design from exogenously incomplete regimes we formulate and solve a range of dynamic models of constrained credit insurance that allow for moral hazard and limited commitment we compare them to full insurance and exogenously incomplete financial regimes autarky saving only borrowing and lending in a single asset we develop computational methods based on mechanism design linear programming and maximum likelihood to estimate compare and statistically test these alternative dynamic models with financial information constraints our methods can use both cross sectional and panel data and allow for measurement error and unobserved heterogeneity we estimate the models using data on thai households running small businesses from two separate samples we find that in the rural sample the exogenously incomplete saving only and borrowing regimes provide the best fit using data on consumption business assets investment and income family and other networks help consumption smoothing there as in a moral hazard constrained regime in contrast in urban areas we find mechanism design financial information regimes that are decidedly less constrained with the moral hazard model fitting best combined business and consumption data we perform numerous robustness checks in both the thai data and in monte carlo simulations and compare our maximum likelihood criterion with results from other metrics and data not used in the estimation a prototypical counterfactual policy evaluation exercise using the estimation results is also featured

news or noise internet postings and stock prices the anecdotal evidence is growing that postings in internet financial forums affect stock prices either because the postings contain new information or because they represent successful attempts to manipulate stock prices from an investment perspective knowing whether this phenomenon is pervasive is important we examined the relationship between internet message board activity and abnormal stock returns and trading volume in the period from mid april 1999 to mid february 2000 our study focused on the ragingbull com discussion forum an extremely popular site whose format permits the construction of an objective measure of investor opinions for stocks in the internet service sector we found that on days with abnormally high message activity changes in investor opinion correlated with abnormal industry adjusted returns these event days also coincided with abnormally high trading volume which persisted for a second day however we found that message board activity did not predict industry adjusted

liquidity constrained markets versus debt constrained markets this paper compares two different models in a common environment the first model has liquidity constraints in that consumers save a single asset that they cannot sell short the second model has debt constraints in that consumers cannot borrow so much that they would want to default but is otherwise a standard complete markets model both models share the features that individuals are unable to completely insure against idiosyncratic shocks and that interest rates are lower than subjective discount rates in a stochastic environment the two models have quite different dynamic properties with the debt constrained model exhibiting simple stochastic steady states while the liquidity constrained model has greater persistence of shocks

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

a reconsideration of minsky s financial instability hypothesis the worst and longest depressions have tended to occur after periods of prolonged and reasonably stable prosperity this results in part from agents rationally updating their expectations during good times and hence becoming more optimistic about future economic prospects investors then increase their leverage and shift their portfolios towards projects that would previously have been considered too risky so when a downturn does eventually occur the financial crisis and the extent of default become more severe whereas a general appreciation of this syndrome dates back to minsky 1992 jerome levy economics institute wp 74 and even beyond to irving fisher 1933 econometrica 1 337 357 we model it formally in addition endogenous default introduces a pecuniary externality since investors do not factor in the impact of their decision to take risk and default on the borrowing cost we explore the relative advantages of alternative regulations in reducing financial fragility and suggest a novel criterion for improvement of aggregate welfare

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

a unified model of entrepreneurship dynamics we develop an incomplete markets q theoretic model to study entrepreneurship dynamics precautionary motive borrowing constraints and capital illiquidity lead to underinvestment conservative debt use under consumption and less risky portfolio allocation the endogenous liquid wealth illiquid capital ratio w measures time varying financial constraint the option to accumulate wealth before entry is critical for entrepreneurship flexible exit option is important for risk management purposes investment increases and the private marginal value of liquidity decreases as w decreases and exit becomes more likely contrary to predictions of standard financial constraint models we show that the idiosyncratic risk premium is quantitatively significant especially for low w

unsecured debt with public insurance from bad to worse abstract in u s data income interruptions the receipt of public insurance and the incidence of personal bankruptcy are all closely related the central contribution of this paper is to evaluate bankruptcy protection and public insurance in a unified setting where each program alters incentives in the other our analysis delivers two striking conclusions first we find that u s personal bankruptcy law is an important barrier that prevents the public insurance system from improving welfare second contrary to popular belief we find that increases in the generosity of public insurance will lead to more not less bankruptcy

evidence on the insurance effect of bankruptcy exemptions abstract defaulting on one s debts when experiencing an adverse event can help insure households against unexpected income risks but the effect of allowing default on debt levels is ambiguous not least because lenders may restrict access to credit hence the optimal punishment for bankruptcy is unclear the us states allows householders to keep a variety of assets when filing for bankruptcy the bankruptcy exemptions and these exemptions change substantially between states and over time by exploiting these differences this study shows that raising the exemptions i marginally decreases the level of unsecured debt that household s hold ii makes consumption smoother thus despite the effect on debt levels the generous provisions to debtors in arrears may be helping us households to insure themselves against income risk

recent developments in consumer credit and default literature consumer credit and default literature this survey discusses recent contributions to the quantitative literature on unsecured consumer debt and default and some ongoing challenges for the literature key topics include the sources of the rise in personal bankruptcies the importance of asymmetric information and the effects of developments in information technologies on consumer credit markets delinquency and informal bankruptcy debt collection and restructuring of distressed debt the cyclical behavior of consumer debt and default and the insurance role of household debt implications for welfare analysis and policy design are discussed several theoretical contributions and approaches to modeling the consumer credit markets are also highlighted

the output costs of hard and soft sovereign default abstract how costly are sovereign debt crises in this paper we study output losses during sovereign default and debt renegotiation episodes since 1980 in contrast to previous work we account for the severity of default and not only for its occurrence specifically we distinguish between hard and soft defaults using new data on debtor payment and negotiation behavior and on the size of haircuts towards private external creditors we show that hard defaults are associated with a much steeper drop in gdp of up to ten percent compared to soft defaults the results are consistent with theoretical models assuming proportional output costs of default

sovereign debt with heterogeneous creditors we develop a sovereign debt model with heterogeneous creditors private and official where the probability of default depends on both the level and the composition of debt higher exposure to official lenders improves incentives to repay due to more severe sanctions but it is also costly because it lowers the value of the sovereign s default option the model can account for the co existence of private and official lending the time variation in their shares in total debt as well as the low rates charged on both it also produces intertwined default and debt composition choices

survival with ambiguity we analyze a market populated by expected utility maximizers and smooth ambiguity averse consumers we study conditions under which ambiguity averse consumers survive and affect prices in the limit if ambiguity vanishes with time or if the economy exhibits no aggregate risk ambiguity averse consumers survive but have no long run impact on prices in both scenarios ambiguity averse consumers are fully insured against ambiguity in equilibrium and thus behave as expected utility maximizers with correct beliefs if ambiguity averse consumers are not fully insured against ambiguity their behavior mimics expected utility maximizers with wrong beliefs and a stochastic discount factor which might be consistently higher or lower than their actual discount factor we use this insight to analyze a markov economy with large persistent ambiguity consumers with decreasing absolute ambiguity aversion whose prudence with respect to ambiguity exceeds twice their absolute ambiguity aversion a s survive in the presence of expected utility maximizers with correct beliefs if the economy further exhibits aggregate risk they drive the expected utility maximizers out of the market and determine prices in the limit in contrast consumers with increasing or constant absolute ambiguity aversion only survive in the absence of aggregate risk and have no impact on limit prices

balance of trade announcements and asset prices influence on equity prices exchange rates and interest rates abstract this paper examines the informational impact of traded balance announcements on asset prices including equities currrencies long and short term debt instruments and financial futures this study finds that in the 1980s prior to the 1985 plaza agreement for international economic cooperation information in trade balance announcements seem to have influenced only interest rates however in the 1985 1987 period such announcements also influenced stock prices and currency values these influences intensity further in the 1987 1988 period thus asset prices are sensitive to news in trade balance announcements and this sensitivity seems to have increased significantly in recent years with important implications for asset pricing models and economic policy formulation jel f30

efficiency and the role of default when security markets are incomplete this paper argues that default plays an important positive role in the economy if markets are incomplete and traders are only able to enter into contracts that they will be able to execute regardless of future events contingent contracting may be severely restricted moreover opening new markets may not relieve these restrictions default promotes efficiency in a way that opening new markets does not by making it possible for traders to enter into contracts that they will be able to execute with high probability but not with certainty copyright 1993 by american economic association

the out of sample forecasting performance of exchange rate models when coefficients are allowed to change abstract this study examines the out of sample forecasting performance of models of exchange rate determination without imposing the restriction that coefficients are fixed over time both fixed and variable coefficient versions of conventional structural models are considered with and without a lagged dependent variable while our results on fixed coefficient models support most of the meese and rogoff conclusions we find that when coefficients are allowed to change an important subset of conventional models of the dollar pound the dollar deutsche mark and the dollar yen exchange rates can outperform forecasts of a random walk model the structural models considered are the flexible price frenkel bilson and sticky price dornbusch frankel monetary models and a sticky price model which includes the current account hooper morton

strategic or nonstrategic the role of financial benefit in bankruptcy i introduction personal bankruptcy rates have increased at an annual rate of 3 9 since 1990 from about 718 thousand non business bankruptcies in 1990 to about 1 5 million in 2010 partly as a response to this increase the congress passed the bankruptcy abuse prevention and consumer protection act bapcpa of 2005 the largest overhaul of bankruptcy laws since 1980 although recent data are too sparse to determine the longer term effectiveness of the law we know that there was a spike in bankruptcy filings in 2005 just before the law took effect on october 17 2005 and a corresponding decline in 2006 since then bankruptcies have continued to rise reaching a level of about 1 5 million in 2010 the same level as in 2004 the bankruptcy rate has also begun to creep up to the earlier levels one of the major purposes of the new bankruptcy law was to cut down on abusive or fraudulent uses of the bankruptcy system or in other words strategic use of the law therefore it is important to understand the motivations of consumers who file for bankruptcy what constitutes strategic use of bankruptcy law and how widespread is its incidence in the literature there is no clear definition of what constitutes a strategic bankruptcy filing we shall consider strategic behavior to be a conscious decision to benefit from bankruptcy law to make this tractable consider a simple two period model of decision making in the first period consumers receive a noisy signal of experiencing a financial shock in the second period based on this signal consumers may update their probability of an adverse shock and choose their debt level in the second period the shock is realized and consumers decide whether to file for bankruptcy or not a strategic consumer is one who in the first period chooses her debt level after conditioning on the signal that is a strategic consumer takes on debt after accounting for the chance of filing for bankruptcy in other words a strategic consumer is one who is fully rational and takes decisions to maximize her benefit a nonstrategic consumer is one who chooses debt level without conditioning on the signal he plans to repay his debt in the absence of adverse events such a consumer is myopic and may be exhibiting rational inattention as described below consistent with this view we may distinguish between strategic and nonstrategic behavior by testing whether consumers make their debt and filing decision jointly or not strategic behavior is consistent with a joint decision whereas nonstrategic behavior is not in terms of empirical strategy this is implemented by testing whether financial benefit is endogenous to the filing decision or not our test is different from the one in the study by fay hurst and white 2002 henceforth fhw in that approach a positive relationship between filing for bankruptcy and financial benefit from filing ceteris paribus is taken as evidence of strategic behavior and a positive relationship between filing for bankruptcy and adverse events such as divorce health shocks employment shocks etc is taken as evidence of nonstrategic behavior using data from the panel study of income dynamics psid fhw show that financial benefit is positively and significantly related to the filing decision and after controlling for financial benefit adverse event variables do not affect the bankruptcy decision except for a marginally significant positive effect of divorce 1 this simple empirical relationship between bankruptcy filing and financial benefit does not consider more realistic relationships among financial benefit adverse events and strategic behavior for example financial benefit from filing may go up due to adverse events regardless of whether a consumer is trying to abuse bankruptcy law or not that is financial benefit goes up when a consumer consciously increases unsecured debts before filing consistent with strategic behavior and it also goes up when she uses unsecured debt e

subjective beliefs and ex ante trade we study a definition of subjective beliefs applicable to preferences that allow for the perception of ambiguity and provide a characterization of such beliefs in terms of market behavior using this definition we derive necessary and sufficient conditions for the efficiency of ex ante trade and show that these conditions follow from the fundamental welfare theorems when aggregate uncertainty is absent our results show that full insurance is efficient if and only if agents share some common subjective beliefs our results hold for a general class of convex preferences which contains many functional forms used in applications involving ambiguity and ambiguity aversion we show how our results can be articulated in the language of these functional forms confirming results existing in the literature generating new results and providing a useful tool for applications

sovereign risk interbank freezes and aggregate fluctuations abstract this paper shows how spillovers from sovereign risk to banks access to wholesale funding establish a bank sovereign nexus in a dynamic stochastic general equilibrium set up heterogeneous banks give rise to an interbank market where government bonds are used as collateral government borrowing under limited commitment is costly ex ante as bank funding conditions tighten when the quality of collateral drops these spillovers by impeding interbank intermediation lower the penalty from defaulting due to an interbank freeze during a recession and propagate aggregate shocks to the macroeconomy the model is calibrated using greek data and is capable of reproducing stylized facts from the european sovereign debt crisis in an application we show that the ecb s non standard financing operations mitigate the adverse feedback mechanism

ambiguity aversion in the long run to disagree we must also agree abstract we consider an economy populated by smooth ambiguity averse agents with complete markets of securities contingent to economic scenarios where bankruptcy is permitted but there is a penalty for it we show that if agents posterior belief reductions given by their average probabilistic beliefs do not become homogeneous then an equilibrium does not exist it is worth noting that our main result does not imply any convergence of ambiguity perception or even the attitudes towards it in this way complete markets with default and punishment allow for ambiguity aversion in the long run and the agents can disagree on their ambiguity perception but they must agree on their expected beliefs

redistributive taxation and personal bankruptcy in u s states abstract personal bankruptcy regulation and redistributive taxes and transfers vary considerably across u s states and over time our hypothesis is that both policies are imperfect substitutes in insuring consumption of risk averse agents in incomplete markets exploiting data variation over time for 18 u s states for the period 1980 2003 we find considerable support for this hypothesis redistributive taxation and bankruptcy exemptions are negatively correlated and both policies are associated with more equal consumption growth

ambiguity made precise a comparative foundation the theory of subjective expected utility has been recently extended to allow ambiguity to matter for choice we propose a notion of absolute ambiguity aversion by building on a notion of comparative ambiguity aversion we characterize it for a preference model which encompasses some of the most popular models in the literature we next build on these ideas to provide a definition of unambiguous act and event and show the characterization of the latter as an illustration we consider the classical ellsberg 3 color urn problem and find that the notions developed in the paper provide intuitive answers journal of economic literature classification number d81

proxying for unobservable variables with internet document frequency the internet contains billions of documents we show that document frequencies in large decentralized textual databases can capture the cross sectional variation in the occurrence frequencies of social phenomena we characterize the econometric conditions under which such proxying is likely we also propose using recently introduced internet search volume indexes as proxies for fundamental locational traits and discuss their advantages and limitations we then successfully proxy for a number of economic and demographic variables in us cities and states we further obtain document frequency measures of corruption by country and us state and replicate the econometric results of previous research studying its covariates finally we provide the first measure of corruption in american cities poverty population size service sector orientation and ethnic fragmentation are shown to predict higher levels of corruption in urban america

default and renegotiation a dynamic model of debt we analyze the role of debt in persuading an entrepreneur to pay out cash e ows rather than to divertthem in the e rstpartof the paper we study the optimal debt contract specie cally the trade off between the size of the loan and the repayment under the assumption that some debt contract is optimal in the second part we consider a more general class of nondebt contracts and derive sufficient conditions for debt to be optimal among these

trade credit in zimbabwean manufacturing abstract credit from suppliers is an important but often neglected source of finance for manufacturing firms zimbabwe is no exception unlike credit from financial institutions trade credit does not rely on formal collateral but on trust and reputation contract enforcement is flexible network effects and statistical discrimination affect the screening of trade credit applicants black entrepreneurs are disadvantaged by their lack of business contacts and by the difficulty of distinguishing themselves from the mass of financially insecure and short lived african owned businesses in zimbabwe a vicious circle is created between weak financial base unreliability as a debtor and inability to gain access to credit