banking panics information and rational expectations equilibrium this paper shows that bank runs can be modeled as an equilibrium phenomenon we demonstrate that some aspects of the intuitive story that bank runs start with fears of insolvency of banks can be rigorously modeled if individuals observe long lines at the bank they correctly infer that there is a possibility that the bank is about to fail and precipitate a bank run however bank runs occur even when no one has any adverse information extra market constraints such as suspension of convertibility can prevent bank runs and result in superior allocations banking panics were a recurrent phenomenon in the united states until the 1930s they have re emerged as a source of public concern and much theoretical research recently in this paper we provide an information theoretic rationale for bank runs the traditional story is that contagion is an important aspect of bank runs the idea seems to be that when the general public observes large withdrawals from the banking system fears of insolvency grow resulting in even larger withdrawals of deposits in our model some individuals withdraw because they get information that future returns are likely to be low uninformed individuals observing this also have an incentive to liquidate their investments in addition some individuals need to withdraw deposits for other than informationally based reasons thus if the random realization of such a group of individuals is unusually large then the uninformed individuals will be misled and will precipitate a run on the bank the technology is such that a large volume of withdrawals involves liquidation costs consequently runs on the bank do impose social costs a mechanism that may reduce these costs in our model is to suspend convertibility if withdrawals are high however those individuals who need to withdraw their assets for liquidity reasons are worse off ex post our model provides a rationalization for restrictions in demand deposits that were widespread prior to 1929 friedman and schwartz 7 suggest that restrictions of payments ensured

remaking macroeconomic policy after the global financial crisis a balance sheet approach this paper describes the origins of the global financial crisis and how the prevailing new keynesian macroeconomic orthodoxy failed to anticipate its severity this failure we argue stemmed from an incomplete understanding of the pivotal role of financial institutions in the amplification of the crisis and its transmission to the wider economy low global interest rates and a consequent search for yield in the pre crisis period encouraged financial institutions to build highly leveraged balance sheets which in turn generated extremely large asset price movements when a small event the downturn in the us sub prime mortgage market triggered the crisis the paper then briefly describes the element of the broadly successful and coordinated macroeconomic policy response to the crisis before turning to the medium term challenges facing policymakers in sustaining global recovery at the national level we focus on the resolution of fiscal imbalances which contributed in part to the crisis and which then worsened because of the policy actions which have been taken to deal with it at the international level we emphasise the need to rectifying the imbalances between savings and investment in many significant countries this will require greater coordination of macroeconomic policy across the world s major economies it will also involve strengthening the role and the governance of the international monetary fund

learning by bidding we analyze a dynamic second price auction with an informed bidder and an uninformed bidder who upon seeing a posted price learns whether his valuation is above that price in the essentially unique equilibrium an informed bidder bids in the first period if her valuation is below some cutoff and bids only in the last period otherwise an uninformed bidder bids in every period to optimally change the price unless the price is above his valuation or he is the high bidder this model also provides a rationale behind the use of a secret reserve price in private value settings

the wait and see option in ascending price auctions ascending auctions offer agents the option to wait and see before deciding to drop out we show that in contexts where as time proceeds agents get finer and finer estimates of their valuations incentives to drop out at one s expected valuation are weak it is optimal for agents to wait and see we first illustrate the claim in a private value setting we next analyze an interdependent value setting in which this wait and see option results in an imperfect information aggregation we also analyze the implications for the seller s revenue and show that the ascending format may dominate the second price format independently of the date at which the second price auction is run jel d44 d83

interbank market liquidity and central bank intervention we develop a simple model of the interbank market where banks trade a long term safe asset when there is a lack of opportunities for banks to hedge idiosyncratic and aggregate liquidity shocks the interbank market is characterized by excessive price volatility in such a situation a central bank can implement the constrained efficient allocation by using open market operations to fix the short term interest rate it can be constrained efficient for banks to hoard liquidity and stop trading with each other if there is sufficient uncertainty about aggregate liquidity demand compared to idiosyncratic liquidity demand

sulfur dioxide control by electric utilities what are the gains from trade title iv of the 1990 clean air act amendments caaa established a market for transferable sulfur dioxide so2 emission allowances among electric utilities this market offers firms facing high marginal abatement costs the opportunity to purchase the right to emit so2 from firms with lower costs and this is expected to yield cost savings compared to a command and control approach to environmental regulation this paper uses econometrically estimated marginal abatement cost functions for power plants affected by title iv of the caaa to evaluate the performance of the so2 allowance market specifically we investigate whether the much heralded fall in the cost of abating so2 compared to original estimates can be attributed to allowance trading we demonstrate that for plants that use low sulfur coal to reduce so2 emissions technical change and the fall in prices of low sulfur coal have lowered marginal abatement cost curves by over 50 percent since 1985 the flexibility to take advantage of these chan

small worlds modeling attitudes toward sources of uncertainty abstract we introduce the concept of a conditional small world event domain an extension of savage s the foundations of statistics wiley new york 1954 notion of a small world as a self contained collection of comparable events under weak behavioral conditions we demonstrate probabilistic sophistication in any small world event domain without relying on monotonicity or continuity probabilistic sophistication within though not necessarily across small worlds provides a foundation for modeling a decision maker that has source dependent risk attitudes this also helps formalize the idea of source preference and suggests an interpretation of ambiguity aversion often associated with ellsberg type behavior in terms of comparative risk aversion across small worlds

insuring banks against liquidity shocks the role of deposit insurance and lending of last resort it has long been recognized that banks simultaneous provision of monitoring and liquidity services is advantageous but leaves them susceptible to liquidity shocks that may culminate in a system failure because a system failure is costly this provides a rationale for adopting arrangements including a lender of last resort and deposit insurance di to insure banks against liquidity shocks these arrangements have proven themselves very successful but they have also been the source of problems researchers have identified some of the main sources of these problems and have suggested ways to improve the design of these arrangements but there are still many issues that remain unaddressed this paper reviews the literature on the two arrangements that most countries have adopted to insure banks against liquidity shocks a lender of last resort and di and compares the design of these arrangements across countries the paper ends with a brief summary of the key lessons learned about the design of these arrangements and the issues related to them that remain unaddressed copyright blackwell publishers ltd 2006

a real options approach to bankruptcy costs evidence from failed commercial banks during the 1990s literature identifies three main aspects of liquidation costs firm size asset specificity and industry concentration this paper unifies the theory behind these aspects of bankruptcy costs by treating them as components of a broader option valuation problem faced by the liquidating trustee testing the hypothesized asset price relationships on fdic failed bank liquidation data yields the appropriate results furthermore it appears that liquidation time alone can be used as an effective second order proxy for asset value growth where market value estimates are unavailable

central banks and financial stability rediscovering the lender of last resort practice in a finance economy the purpose of our paper is to assess whether central banks have adopted new practices of lending in last resort during the 2007 09 financial crisis we compare the current period with the classical period both featured by a finance economy with developed financial markets and unregulated institutions beyond the differences determined by the monetary regime and concerning the central bank rate policy we find similarities such as the enlargements of the set of counterparties and eligible collateral assets since the credit system is based on financial markets and innovations central banks have a wider involvement that goes beyond a narrow conception of the lender of last resort that prevailed under a regulated banking system we conclude that the historical roots of financial stabilisation by central banks in a finance economy have just been rediscovered and that the functions of lender of last resort and market maker of last resort may be analytically integrated copyright oxford university press

unique equilibrium in a model of self fulfilling currency attacks even though self fulfilling currency attacks lead to multiple equilibria when fundamentals are common knowledge we demonstrate the uniqueness of equilibrium when speculators face a small amount of noise in their signals about the fundamentals this unique equilibrium depends not only on the fundamentals but also on financial variables such as the quantity of hot money in circulation and the costs of speculative trading in contrast to multiple equilibrium models our model allows analysis of policy proposals directed at curtailing currency attacks

liquidity and contagion the crisis of 1763 the financial crisis that swept across northern europe in 1763 bears a strong resemblance to more recent episodes of financial distress the combination of the specific contractual arrangements at the time interlocking credit relationships and the high leverage of market participants triggered distress sales of assets leading into a severe liquidity crisis hence the crisis is an early instance of contagion on the asset side of the balance sheet we highlight the salient features of the 1763 crisis and propose a stylized model of the events whilst the financial institutions have changed fundamentally in the intervening two hundred or so years the underlying problems appear to be universal

ambiguity aversion and incompleteness of financial markets it is widely thought that incomes risks can be shared by trading in financial assets but financial assets typically carry some risk idiosyncratic to them hence disposing incomes risk using financial assets will involve buying into the inherent idiosyncratic risk however standard theory argues that diversification would reduce the inconvenience of idiosyncratic risk to arbitrarily low levels this argument is less robust than what standard theory leads us to believe ambiguity aversion can exacerbate the tension between the two kinds of risks to the point that classes of agents may not want to trade some financial assets thus theoretically the effect of ambiguity aversion on financial markets is to make the risk sharing opportunities offered by financial markets less complete than it would be otherwise

financial complexity and trade what are the implications on trading activity if investors are not sophisticated enough to understand and evaluate trades that have a complex payoff structure can frictions generated by this type of financial complexity be so severe that they lead to a complete market freeze like that of the recent financial crisis starting from an allocation that is not pareto optimal we find that whether complexity impedes trade depends on how investors perceive risk and uncertainty for smooth convex preferences such as subjective expected utility complexity cannot halt trade even in the extreme case where each investor is so unsophisticated that he can only trade up to one arrow debreu security without being able to combine two or more in order to construct a complex trade however for non smooth preferences which allow for kinked indifference curves such as maxmin expected utility complexity can completely shut down trade

first order and second order ambiguity aversion different models of uncertainty aversion imply strikingly different economic behavior the key to understanding these differences lies in the dichotomy between first order and second order ambiguity aversion which i define here my definition and its characterization are independent of specific representations of decisions under uncertainty i show that with second order ambiguity aversion a positive exposure to ambiguity is optimal if and only if there is a subjective belief such that the act s expected outcome is positive with first order ambiguity aversion zero exposure to ambiguity can be optimal examples in finance insurance and contracting demonstrate the economic relevance of this dichotomy this paper was accepted by han bleichrodt decision analysis

estimating bilateral exposures in the german interbank market is there a danger of contagion abstract credit risk associated with interbank lending may lead to domino effects where the failure of one bank results in the failure of other banks not directly affected by the initial shock recent work in economic theory shows that this risk of contagion depends on the precise pattern of interbank linkages we use balance sheet information to estimate a matrix of bilateral credit relationships for the german banking system and test whether the breakdown of a single bank can lead to contagion we find that in the absence of a safety net there is considerable scope for contagion that could affect a large proportion of the banking system the financial safety net in this case institutional guarantees for saving banks and cooperative banks considerably reduces but does not eliminate the danger of contagion even so the failure of a single bank could lead to the breakdown of up to 15 of the banking system in terms of assets

the two waves of voucher privatization in the czech republic a model of learning in sequential bidding this study develops a dynamic model of bidding behaviour to investigate the czech voucher privatization process which took place in two waves of bidding rounds the first in 1992 and the second in 1994 it examines the voucher mechanism from the standpoint of investors and the pricing and allocation of shares investors could participate as independent individuals or by assigning some of all of their voucher points to investment privatization funds principal findings are that individual participants behaved differently from funds and benefited by learning from one round to the next and from observing the behaviour of the funds an important collateral finding is that the market though crude behaved efficiently in the adjustment of share prices over the bidding rounds

distinguishing panics and information based bank runs welfare and policy implications in this paper we contrast panics and information based bank runs in an effort to provide a robust and empirically plausible model of how bank runs are triggered the model of information based runs is characterized by two sided asymmetric information the bank cannot observe the true liquidity needs of the depositors while depositors are asymmetrically informed about bank asset quality we also examine the relative degrees of risk sharing provided by bank deposit contracts and traded equity contracts we show that the choice of deposit or equity depends on the attributes of and information about the underlying investment returns

ambiguity aversion and the absence of wage indexation abstract this paper analyzes optimal wage contracting assuming agents are not subjective expected utility maximizers but are instead ambiguity or uncertainty averse decision makers who maximize choquet expected utility we show that such agents will choose not to include any indexation coverage in their wage contracts even when inflation is uncertain unless the perceived inflation uncertainty is high enough significantly the exercise does not presume any exogenous costs e g transactions costs of including indexation links

the fragile capital structure of hedge funds and the limits to arbitrage abstract during a financial crisis when investors are most in need of liquidity and accurate prices hedge funds cut their arbitrage positions and hoard cash the paper explains this phenomenon we argue that the fragile nature of the capital structure of hedge funds combined with low market liquidity creates a risk of coordination in redemptions among hedge fund investors that severely limits hedge funds arbitrage capabilities we present a model of hedge funds optimal asset allocation in the presence of coordination risk among investors we show that hedge fund managers behave conservatively and even abstain from participating in the market once coordination risk is factored into their investment decisions the model suggests a new source of limits to arbitrage

the lender of last resort a twenty first century approach the classical bagehot conception of a lender of last resort lolr that lends to illiquid banks has been criticized on two grounds on the one hand the distinction between insolvency and illiquidity is not clear cut on the other a fully collateralized repo market allows central banks to provide the adequate aggregate amount of liquidity and leave to the banks the responsibility of lending uncollateralized the object of this paper is to analyze these issues rigorously by providing a framework in which liquidity shocks cannot be distinguished from solvency ones and then asking whether there is a need for a lolr and how it should operate in the absence of systemic threats determining the optimal lolr policy requires a careful modeling of the structure of the interbank market and of the closure policy in our setup the results depend upon the existence of moral hazard if the main source of moral hazard is the banks lack of incentives to screen loans then the lolr may have to intervene to improve the efficiency of an unsecured interbank market in crisis periods if instead the main source of moral hazard is loan monitoring then the interbank market should be secured and the lolr should never intervene jel e58 628

who should act as lender of last resort an incomplete contracts model a comment researchers have pointed out that conflicts between the objectives of different bank regulators necessitate careful design of the institutional allocation of regulatory authority in doing this however they often assume that regulators have incentives to share their private information regarding regulated banks our paper shows that the very same considerations that lead bank regulators to make different policy choices render the informationsharing assumption invalid we further show that this result has important implications for the institutional allocation of lending of last resort deposit insurance and bank supervision

optimal financial crises empirical evidence suggests that banking panics are related to the business cycle and are not simply the result of sunspots panics occur when depositors perceive that the returns on bank assets are going to be unusually low we develop a simple model of this in this setting bank runs can be first best efficient they allow efficient risk sharing between early and late withdrawing depositors and they allow banks to hold efficient portfolios however if costly runs or markets for risky assets are introduced central bank intervention of the right kind can lead to a pareto improvement in welfare from the earliest times banks have been plagued by the problem of bank runs in which many or all of the bank s depositors attempt to withdraw their funds simultaneously because banks issue liquid liabilities in the form of deposit contracts but invest in illiquid assets in the form of loans they are vulnerable to runs that can lead to closure and liquidation a financial crisis or banking panic occurs when depositors at many or all of the banks in a region or a country attempt to withdraw their funds simultaneously prior to the twentieth century banking panics occurred frequently in europe and the united states panics were generally regarded as a bad thing and the development of central banks to eliminate panics and ensure financial stability has been an important feature of the history of financial systems it has been a long and involved process the first cerntral bank the bank of sweden was established more than 300 years ago the bank of england played an especially important role in the development of effective stabilization policies in the eighteenth and nineteenth centuries by the end of the nineteenth century banking panics had been eliminated in europe the last true panic in england was the overend gurney company crisis of 1866

a theory of subjective compound lotteries abstract we develop a savage type model of choice under uncertainty in which agents identify uncertain prospects with subjective compound lotteries our theory permits issue preference that is agents may not be indifferent among gambles that yield the same probability distribution if they depend on different issues hence we establish subjective foundations for the anscombe aumann framework and other models with two different types of probabilities we define second order risk as risk that resolves in the first stage of the compound lottery and show that uncertainty aversion implies aversion to second order risk which implies issue preference and behavior consistent with the ellsberg paradox

do banks have a future abstract are banks special intermediaries do they play any unique role in the economy and if so will they retain their specialness in the ever faster changing world of finance the rapid evolution of finance over the last two decades and the breathtaking e age revolution have persuaded many that eventually banks will be indistinguishable from other financial intermediaries since all their functions can at least as efficiently be carried out by nonbanks this study re explores the issue of the specialness of banks in light of the large existing literature on the subject and presents an approach which identifies the banks specialness with their unique capacity to lend out claims on their own debt which the public accepts and uses as money the study discusses various structural and policy implications deriving from the approach and draws on it to point to the continuing relevance of banking in a world where nonbanks are taking business away from banks lending to production has become relatively less important and the use of e money may soon be dominating financial transactions

sharing risk and ambiguity we study the market implications of ambiguity in common models we show that generic determinacy is a robust feature in general equilibrium models that allow a distinction between ambiguity and risk

what factors drive systemic risk during international financial crises abstract we analyze the determinants of the contribution of international banks to both global and local systemic risk during prominent financial crises we find no empirical evidence supporting conjectures that bank size leverage non interest income or the quality of the bank s credit portfolio are persistent determinants of systemic risk across financial crises in contrast our results show that global systemic risk in particular is predominantly driven by characteristics of the regulatory regime we also confirm for the subprime crisis that the banks contribution to moderately bad tail events in the past predicts the financial sector s crash risk

revenue non equivalence between auctions with soft and hard closing mechanisms new evidence from yahoo abstract we use a unique dataset to examine the revenue differences between auctions with a hard close ending rule versus those with a soft close ending rule we find that selling items using the soft close rule increases the selling price by an amount between 25 and 44 or 13 20 percent over the hard close format one possible theoretical explanation for these results is that the hard close ending rule accommodates the practice of sniping which leads to a lower expected selling price we find empirically that a lack of experience could help to explain why in spite of the revenue differences some sellers select the hard close ending rule

financial intermediation and delegated monitoring this paper develops a theory of financial intermediation based on minimizing the cost of monitoring information which is useful for resolving incentive problems between borrowers and lenders it presents a characterization of the costs of providing incentives for delegated monitoring by a financial intermediary diversification within an intermediary serves to reduce these costs even in a risk neutral economy the paper presents some more general analysis of the effect of diversification on resolving incentive problems in the environment assumed in the model debt contracts with costly bankruptcy are shown to be optimal the analysis has implications for the portfolio structure and capital structure of intermediaries

tournaments as a response to ambiguity aversion in incentive contracts we study a principal agent problem with multiple identical agents where the action dependent stochastic relationship between actions and output is perceived to be ambiguous and agents are ambiguity averse we argue that ambiguity and particularly ambiguity aversion make it more attractive for the principal to choose a tournament if agents are risk neutral but ambiguity averse we show that the set of optimal incentive schemes contains a tournament moreover if ambiguity is rich enough all optimal incentive schemes must be such that realized output levels affect only the distribution of wages across agents and not the total wages paid out as it is true for tournaments when agents are both risk averse and ambiguity averse tournaments need not be optimal but ambiguity and ambiguity aversion still favor in many cases the use of tournaments or tournament like schemes over e g incentive schemes that only depend on each agent s own output level

delegated monitors large and small germany s banking system 1800 1914 banks play a greater role in the german financial system than in those of the united states or britain germany s large universal banks are admired by those who advocate bank deregulation in the united states others admire the universal banks for their supposed role in corporate governance and industrial finance many discussions distort the german banking system by overstressing one of several types of banks and ignore the competition and cooperation between the famous universal banks and other banking groups tracing the historical development of the german banking system from the early nineteenth century places the large universal banks in context

the role of demandable debt in structuring optimal banking arrangements demandable debt finance by banks warrants explanation because it entails costs of bank suspension liquidation and idle reserve holdings an explanation is developed in which demandable debt provides incentive compatible intermediation where the banker has comparative advantage in allocating investment funds but may act against the interests of uninformed depositors demandable debt attracts funds by giving depositors an option to force liquidation its usefulness in transacting follows from information sharing between monitors and nonmonitors copyright 1991 by american economic association

the price is right but are the bids an investigation of rational decision theory the television game show the price is right is used as a laboratory to conduct a preference free test of rational decision theory in an environment with substantial economic incentives it is found that contestants strategies are transparently suboptimal in response to this evidence simple rules of thumb are developed that are shown to explain observed bidding patterns better than rational decision theory further learning during the show reduces the frequency of strategic errors this is interpreted as evidence of bounded rationality finally there is no evidence that a concern for fairness significantly alters bidding behavior copyright 1996 by american economic association

the informational efficiency of experimental asset markets a fundamental difficulty in devising any test of general efficient market hypotheses is the specification of the relevant public and private information sets of traders without a consensus as to reasonable empirical specifications tests of the hypotheses remain minimal or controversial in this study we examine the efficiency of experimental asset markets in which one may unambiguously identify the public and private information sets of traders we focus on how market efficiency is affected by the presence of futures markets in settings that incorporate different types of uncertainty and inside information our experimental results support four conclusions 1 market outcomes tend to evolve toward strong form informationally efficient equilibria whether or not futures markets and or event uncertainty are present 2 the presence of futures markets clearly stabilizes spot prices 3 the presence of futures markets tends to speed the evolution of asset markets to more efficient equilibria where there

the shadow costs of repos and bank liability structure making use of a structural model that allows for optimal liquidity management we study the role that repos play in a bank s financing structure in our model the bank s assets consist of illiquid loans and liquid reserves and are financed by a combination of repos long term debt deposits and equity repos are a cheap source of funding but they are subject to an exogenous rollover risk we show that the use of repos inflicts two types of indirect shadow costs on the bank s shareholders first it induces the bank to maintain higher liquid reserves in order to alleviate the additional default risk second it adds to the cost of long term debt financing these shadow costs limit the bank s appetite for cheap but unstable repo funding this effect is however weakened under poor returns on risky assets access to deposit funding and the depositor preference rule we also analyze the impact of a liquidity coverage ratio payout restrictions and a leverage ratio on the bank s financing choices and show that all these tools are able to curb the bank s reliance on repos

monetary policy in a systemic crisis summary this paper examines the monetary policy followed during the current financial crisis from the perspective of the theory of the lender of last resort it is argued that standard monetary policy measures would have failed because the channels through which monetary policy is implemented depend upon the well functioning of the interbank market as the crisis developed liquidity vanished and the interbank market collapsed central banks had to inject much more liquidity at low interest rates than predicted by standard monetary policy models at the same time as the interbank market did not allow for the redistribution of liquidity among ban ks central banks had to design new channels for liquidity injection

macroprudential policy what can it achieve this paper examines both the objectives and the available instruments for new macroprudential policy making bodies it argues that the objective financial stability is best understood as avoiding widespread disruption of financial flows achieving this objective requires that policy makers carry out two different but related tasks first they must ensure the resilience of the financial system to external shocks second they must respond in a timely fashion to future unsustainable expansions of credit and growth of asset prices these are old policy challenges what has changed is the emergence of new vulnerabilities in our innovative and relatively lightly controlled financial system exposed by the recent global financial crisis macroprudential policy can be effective in addressing these vulnerabilities but will not remove the major political and institutional obstacles to the effective control of unsustainable credit expansions 136 words

allocating bank regulatory powers lender of last resort deposit insurance and supervision abstract we examine the optimal institutional allocation of bank regulation we find that centralizing the lending of last resort and deposit insurance functions in a regulator leads to excessive forbearance it also leads the bank to invest suboptimally in loans giving this regulator supervision improves on both problems but it still does not lead to the efficient outcome in the multi regulator arrangement we find that it is beneficial to give supervision to the deposit insurer the choice between the unified regulator arrangement and the multi regulator arrangement involves a trade off the multi regulator arrangement reduces the forbearance problem at high levels of liquidity shortage but may exacerbate it at low levels these results assume the absence of information frictions when banks are better informed than regulators we show that regulators may have an incentive not to share private information suggesting it is important to consider regulators informational advantages when deciding on the allocation of regulation

the winner s curse reserve prices and endogenous entry empirical insights from ebay auctions internet auctions have recently gained widespread popularity and are one of the most successful forms of electronic commerce we examine a unique data set of ebay coin auctions to explore the determinants of bidder and seller behavior we begin by documenting a number of empirical regularities in our data set of ebay auctions next we specify and estimate a structural econometric model of bidding on ebay using our parameter estimates from this model we measure the extent of the winner s curse and simulate seller revenue under different reserve prices

free banking and information asymmetry a traditional argument against free banking is that it will collapse because of information externalities it is impossible for depositors to tell whether a high deposit rate offered by a bank is due to its high efficiency or risky lending strategy this paper shows that in a separating equilibrium a higher quality bank offers a lower deposit rate and holds a smaller proportion of risky loans than a lower quality bank to signal its underlying quality hence free banking is not inherently unstable the empirical results for the hong kong banking system during 1964 65 are consistent with the hypothesis of a separating equilibrium

on absolute auctions and secret reserve prices from a theory viewpoint the use of auctions with zero public reserve prices also called absolute auctions or of auctions with secret reserve prices is somewhat puzzling despite being common by allowing that buyers differ in their processing of past data regarding how the participation rate varies with the auction format and how reserve prices are distributed when secret we show in a competitive environment that these auction formats may endogenously emerge we also analyze how buyers with various sophistications and sellers with various costs sort into the different formats thereby offering a range of testable predictions alternative approaches are reviewed

bidding behavior and experience in internet auctions abstract we study the role of experience in internet art auctions by analyzing repeated bidding by the same bidder in a unique longitudinal field dataset our results show that experience significantly lowers the level of bids suggesting that bidders change their bidding behavior throughout time participating in more than ten auctions brings down average bids by up to 26 we further test several possible explanations for the observed learning behavior and show that the change in bidding strategy is a result of a change in within auction behavior that is generated with experience our results are robust to concerns of endogenous participation as well as bidder fixed effects

building an incentive compatible safety net abstract bank safety nets originally proposed as a means of stabilizing financial systems have become an important destabilizing influence government protection of bank debts encourages banks to undertake excessive risk particularly in response to adverse shocks to asset values reforms that would remove the destabilizing moral hazard consequences of government protection are considered both from the perspective of economic desirability and political feasibility requiring banks to maintain a minimal proportion of subordinated debt finance and restricting the means by which government recapitalization of insolvent banks occurs are the central features of promising reforms to the safety net

the role of interbank markets in monetary policy a model with rationing the empirical research on monetary transmission has reported a number of puzzles challenging extant theoretical models of the transmission mechanism in this paper we argue that asymmetric information in the interbank market may be important to have a better understanding of the mechanisms at work in the transmission process we show that asymmetric information may induce an equilibrium with rationing this in turn has two major implications first it reconciles the apparent irresponsiveness of business investment to the user cost of capital with the large impact of monetary policy magnitude puzzle and second it shows that this impact will not be limited to short term credit supply but will also affect long term lending even if the corresponding interest rate is unaffected composition puzzle

financial networks contagion commitment and private sector bailouts i develop a model of financial networks in which linkages not only spread contagion but also induce private sector bailouts where liquid banks bail out illiquid banks because of the threat of contagion introducing this bailout possibility i show that linkages may be optimal ex ante because they allow banks to obtain some mutual insurance even though formal commitments are impossible however in some cases e g when liquidity is concentrated among a small group of banks the whole network may collapse i also characterize the optimal network size and apply the results to joint liability arrangements and payment systems linkages among agents in financial markets are a concern because of the risk of financial contagion that is the risk that a small shock to one agent will spread to other agents in a domino effect whether we should worry about these linkages is an open question the main goal of this paper is to show that a network in which agents are closely interlinked may be optimal both because of and despite the potential for contagion another goal is to characterize optimal networks that is whether and how agents should be linked to one another the basic intuition is as follows linkages present the threat of contagion to prevent collapse of the whole network agents who are lucky ex post may be willing to bail out those who are not in this way agents obtain the benefits of mutual insurance even though they cannot precommit to making payments

coordination failures and the lender of last resort was bagehot right after all the classical doctrine of the lender of last resort lolr elaborated by bagehot 1873 asserts that the central bank should lend to illiquid but solvent banks under certain conditions several authors have argued that this view is now obsolete in modern interbank markets a solvent bank cannot be illiquid this paper provides a possible theoretical foundation for rescuing bagehot s view our theory does not rely on the multiplicity of equilibria that arises in classical models of bank runs we built a model of banks liquidity crises that possesses a unique bayesian equilibrium in this equilibrium there is a positive probability that a solvent bank cannot find liquidity assistance in the market we derive policy implications about banking regulation solvency and liquidity ratios and interventions of the lender of last resort furthermore we find that public bailout and private bail in involvement are complementary in implementing the incentive efficient solution and that bagehot s lender of last resort facility must work together with institutions providing prompt corrective action and orderly failure resolution finally we derive similar implications for an international lender of last resort ilolr jel g21 g28

examining risk preferences under high monetary incentives experimental evidence from the people s republic of china several experimental sessions were conducted to elicit certainty equivalents for a sequence of lotteries involving real monetary outcomes the opportunity to conduct sessions in the people s republic of china afforded the ability to offer very large monetary incentives relative to subjects living costs in the highest payoff condition subjects earned three times their normal monthly revenue in the course of a two hour experiment results indicate a statistically significant impact of the level of monetary incentives on revealed risk preferences however even under extreme monetary incentives subjects demanded amounts well in excess of expected value for low probability gain prospects copyright 1992 by american economic association

decision theory under ambiguity we review recent advances in the field of decision making under uncertainty or ambiguity we start with a presentation of the general approach to a decision problem under uncertainty as well as the standard bayesian treatment and issues with this treatment we present more general approaches choquet expected utility maximin expected utility smooth ambiguity and so forth that have been developed in the literature under the name of models of ambiguity sensitive preferences we draw a distinction between fully subjective models and models incorporating explicitly some information we review definitions and characterizations of ambiguity aversion in these models we mention the challenges posed by some of the models presented we end with a review of part of the experimental literature and applications of these models to economic settings

is bank supervision central to central banking whether central banks should play an active role in bank supervision and regulation is being debated both in the united states and abroad while the bank of england has recently been stripped of its supervisory responsibilities and several proposals in the united states have advocated removing bank supervision from the federal reserve system other countries are considering enhancing central bank involvement in this area many of the arguments for and against these proposals hinge on the effect this change would have on the ability of the central bank to conduct monetary policy we find that confidential supervisory information on bank ratings significantly improves

estimating individual discount rates in denmark a field experiment we estimate individual discount rates with respect to time streams of money using controlled laboratory experiments these discount rates are elicited by means of field experiments involving real monetary rewards the experiments were carried out across denmark using a representative sample of 268 people between 19 and 75 years of age individual discount rates are estimated for various households differentiated by socio demographic characteristics such as income and age our conclusions are that discount rates are constant over the 12 month to 3 year horizons used in these experiments and that discount rates vary substantially with respect to several socio demographic variables hence we conclude that it would be reasonable to assume constant discount rates for specific household types but not the same rates across all households

naturally occurring markets and exogenous laboratory experiments a case study of the winner s curse we examine the relevance of experimental findings from laboratory settings that abstract from the field context of the task that theory purports to explain using common value auction theory as our guide we identify naturally occurring settings in which one can test the theory experienced agents bidding in familiar roles do not fall prey to the winner s curse yet experienced agents fall prey to the winner s curse when bidding in an unfamiliar role we conclude that the theory predicts field behaviour well when one is able to identify naturally occurring field counterparts to the key theoretical conditions

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

the life cycle of a microfinance institution the irish loan funds abstract ireland s loan funds were a long lived self sustaining large scale microfinance organization that made millions of loans without collateral to the poor during the first 100 years of their life cycle a period of growth ending in the 1840s they adapted constantly and obtained improvements to their legal structure because they were complementary to the banking system and seen as effective in relieving poverty in their 2nd century they became ossified in part because of competition with commercial banks the loan funds provide an example of sustainable microfinance under harsh economic conditions and illustrate how organizations change incrementally and when successful alter their institutional framework

information cascades replication and an extension to majority rule and conformity rewarding institutions in a randomly determined order each agent was given an independent private signal about which of two states was selected by a random draw after receiving the private signal each agent made a publicly announced decision about the state thus at the time of personal decision each agent had a private signal and also knew the decisions of all preceding agents the experiments focused on three different types of organization 1 agents were rewarded according to whether their announced decision was right or wrong this individualistic institution is the one studied by anderson and holt aer 1997 their discovery of information cascades is replicated 2 agents were rewarded according to whether a majority of announced decisions were right or wrong under this majority rule institution the instance of information cascades is sharply reduced 3 agents are rewarded more according to whether their personal announced decision was the same as the majority decision than they were rewarded if their decision was correct this conformity rewarding institution is motivated by proceedings in which there is incentive to produce reports that conform to the reports of others substantial information cascades are observed

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

portfolio choices and asset prices the comparative statics of ambiguity aversion we investigate the comparative statics of more ambiguity aversion as defined by klibanoff marinacci and mukerji 2005 in the context of the static two asset portfolio problem it is not true in general that more ambiguity aversion reduces the demand for the uncertain asset we exhibit some sufficient conditions to guarantee that ceteris paribus an increase in ambiguity aversion reduces the demand for the ambiguous asset and raises the equity premium for example this is the case when the set of plausible distributions of returns can be ranked according to the monotone likelihood ratio order we also show how ambiguity aversion distorts the price kernel in the alternative portfolio problem with complete markets for contingent claims

theory and misbehavior of first price auctions recent experimental evidence appears to reject simple nash equilibrium models of bidding behavior in first price auctions the author presents a methodological critique of this evidence existing tests have concentrated on deviations of subjects from predictions in the message space of the action bid deviations the author suggests that it is more natural to evaluate subject behavior in expected payoff space he concludes that the evidence against the simple models is not significant enough to warrant their rejection copyright 1989 by american economic association

who borrows from the lender of last resort understanding why banks borrow from the lender of last resort lolr during a nancial crisis is crucial to understanding the macroeconomic impact of such largescale interventions we document a strong divergence among banks take up of lolr assistance during the nancial crisis in the euro area as banks which borrowed heavily also used increasingly risky collateral we propose four explanations for this divergence

the effects of imprecise probabilities and outcomes in evaluating investment options vagueness attitudes have been used to explain anomalies and irregularities in investment behavior it is generally assumed ellsberg 1961 that decision makers dms dislike vagueness but this assumption has been challenged by empirical results documenting systematic alternative attitudes to vagueness as a function of its source the domain of the decisions and the response mode used we investigate these three factors in a within subjects design that was embedded in an investment context dms evaluated investment options that varied in terms of their sources of vagueness probabilities and or outcomes in both domains gains or losses and employed two response modes pricing or choice we confirm that individuals vagueness attitudes are malleable contingent on the dimension salience and the reference domain in particular we observed three distinct patterns of reversals of attitudes towards vagueness our results indicate that the ability of vagueness attitudes to predict investment behavior is limited as decisions can be systematically influenced by task context and or perceived gain or loss positions economic models may be improved by incorporating more flexible assumptions about individuals attitudes toward vagueness

bank liquidity interbank markets and monetary policy a major lesson of the recent financial crisis is that the interbank lending market is crucial for banks facing large uncertainty regarding their liquidity needs this paper studies the efficiency of the interbank lending market in allocating funds we consider two different types of liquidity shocks leading to di erent implications for optimal policy by the central bank we show that when confronted with a distribu tional liquidity shock crisis that causes a large disparity in the liquidity held among banks the central bank should lower the interbank rate this view implies that the traditional tenet prescribing the separation between prudential regulation and mon etary policy should be abandoned in addition we show that during an aggregate liquidity crisis central banks should manage the aggregate volume of liquidity two di erent instruments interest rates and liquidity injection are therefore required to cope with the two di erent types of liquidity shocks finally we show that failure to cut interest rates during a crisis erodes financial stability by increasing the risk of bank runs