immobility rationing and price competition a model is studied where firms advertise prices and buyers play a noncooperative search game in an attempt to secure output from firms at the advertised prices firms face rising marginal costs and may not be willing to supply everything demanded at their price if they wind up with many buyers it is shown that rationing will occur in equilibrium no matter how averse buyers are to this possibility the result is specialised to a case where rationing occurs with probability one the equilibrium price and outputs are characterised for this case the theory of search has taken the literature in imperfect competition in an important direction by analysing the behaviour of buyers and sellers in an environment where there is no centralised technique for coordinating the choice decisions of buyers in this paradigm buyers are uninformed about the price that is charged by each different store essentially buyers cannot observe the strategies of individual firms an apparently more common but little analysed problem occurs when buyers can observe the pricing strategies of firms because of advertising but cannot observe the choice strategies of other buyers the ex post utility enjoyed by the buyer is uncertain because he does not know whether capacity constraints or rising costs might force the firm to ration or delay delivery if too many buyers choose the same firm

external discipline and financial stability abstract the paper examines the costs and benefits of external discipline dollarization foreign short term debt from the point of view of the stability of the financial system of an emergent ldc economy external discipline solves the time inconsistency problem of central bank policy to help banks in trouble but at the cost of excessive liquidation of projects the latter may be quite important when the danger of coordination failure of investors is large

limits of exact equilibria for capacity constrained sellers with costly search abstract this paper studies finite versions of competitive matching models in which sellers announce prices and buyers understand the relationship between price and probability of trade two equilibrium concepts are studied for finite games subgame perfect equilibrium and rational expectations equilibrium it is shown that the distribution of prices offered by sellers under both equilibrium concepts converges weakly to the same competitive equilibrium distribution of prices furthermore the payoffs that sellers face in both kinds of equilibrium have the market utility property in the limit journal of economic literature classification numbers c78 d41 d45

dollarization bailouts and the stability of the banking system central bank policy suffers from time inconsistency when facing a banking crisis a bailout is optimal ex post but ex ante it should be limited to control moral hazard dollarization provides a credible commitment not to help at the cost of not helping even when it would be ex ante optimal to do so dollarization is good when the costs of establishing a reputation for the central bank are high monitoring effort by the banker is important in improving returns and when the cost of liquidating projects is moderate however a very severe moral hazard problem could make dollarization undesirable the results obtained are applied to assess the desirability of dollarization in a range of countries and the potential role of the imf as international lolr we would never put ourselves in a position where we envisioned actions that we would take would be of assistance to the rest of the world but to the detriment of the united states alan greenspan to a congressional panel in 1999 iht january 19 2000

wage vacancy contracts and coordination frictions abstract we consider a directed search model with risk averse workers and risk neutral entrepreneurs who can set up firms that post wage vacancy contracts i e contracts where firms can make payments to more than one applicant and where the payments can be different for each applicant and be contingent on the number of applicants we establish that the type of contracts the literature focuses on are not offered if firms can post wage vacancy contracts we show that there exists an equilibrium satisfying a monotonic expected utility property which is efficient furthermore we investigate the role of wage vacancy contracts on welfare and competition

capital markets and the exchange rate with special reference to the dollarization debate in latin america the paper reviews the main challenges faced by policymakers in emerging market economies em in light of recent financial crises and taking into account salient factors like the existence of partial dollarization imperfect credibility weak financial systems and contagion the standard theory of optimal currency areas is discussed and criticized for omitting the above factors when these factors are taken into account an extreme foreign exchange regime like dollarization is shown to become much more attractive the paper discusses the pros and cons of dollarization and among other things shows that the lack of a lender of last resort is not necessarily a major drawback in em the paper also discusses inflation targeting it in a formal model it is shown that it could be subject to credibility problems similar to those found in exchange rate based stabilization programs

plata o plomo bribe and punishment in a theory of political influence we present a model where groups attempt to influence policies using both bribes plata spanish for silver and the threat of punishment plomo spanish for lead we then use it to make predictions about the quality of a country s public officials and to understand the role of institutions granting politicians with immunity from legal prosecution the use of punishment lowers the returns from public office and reduces the incentives of high ability citizens to enter public life cheaper plomo and more resources subject to official discretion are associated with more frequent corruption and less able politicians this predicts that violence in a country will typically go together with corruption and worse politicians moreover the possibility of punishment changes the nature of the influence game so that even cheaper plata can lower the ability of public officials protecting officials from accusations of corruption immunity will decrease the frequency of corruption if the judiciary is weak and may increase the quality of politicians these predictions cannot emerge from a traditional model where only bribes are used the positive evils and dangers of the representative as of every other form of government may be reduced to two heads first general ignorance and incapacity or to speak more moderately insufficient mental qualifications in the controlling body secondly the danger of its being under the influence of interests not identical with the general welfare of the community

money in a theory of banking we introduce money in a model of banking in order to examine how open market operations can affect aggregate bank lending and output we see two important ways changes in money supply affect the banking system first by changing prices and interest rates it affects the wealth of demanders of real liquidity and thus the equilibrium production of liquid assets aggregate output and the health of the banking system second it changes the value of money as a means of payment and thus the attractiveness of moving from deposits to currency the demand for financial liquidity again this impacts the health of the banking system and thus bank lending and aggregate output we use this understanding to see how changes in money supply can create alleviate or be ineffective in banking crises

choosing and reneging on exchange rate regimes we use data on announced and actual exchange rate arrangements to ask which countries follow de facto regimes different from their de iure ones that is do not do what they say our results suggest that countries with poor institutional quality have difficulty in maintaining pegging and abandon it often in contrast many countries with relatively good institutions display fear of floating that is they manage more than announced perhaps to signal their differences from those countries incapable of maintaining promises of monetary stability jel f3 o1

sorting and decentralized price competition we investigate the role of search frictions in markets with price competition and how it leads to sorting of heterogeneous agents there are two aspects of value creation the match value when two agents actually trade and the probability of trading governed by the search technology we show that positive assortative matching obtains when complementarities in the former outweigh complementarities in the latter this happens if and only if the match value function is root supermodular that is its nth root is supermodular where n reflects the elasticity of substitution of the search technology this condition is weaker than the condition required for positive assortative matching in markets with random search

bank runs in emerging market economies evidence from turkey s special finance houses recent banking crises in emerging market countries have renewed debates about deposit insurance because insurance erodes banks incentives to manage risks prudently some argue that its elimination would improve bank stability yet eliminating insurance could be de stabilizing if it recreates risks of self fulfilling runs this paper examines dynamics of depositor behavior during a set of runs on turkey s special finance houses an uninsured sub sector of islamic banks detailed data on withdrawals are analyzed in a vector autoregressive framework that enables us to distinguish between informational and self fulfilling elements of runs we found that both types of dynamics were at work during the runs suggesting a role for deposit insurance judiciously used in ruling out expectational problems that fuel tendencies to run

one money one market the effect of common currencies on trade currency unions their dramatic effect on international trade a gravity model is used to assess the separate effects of exchange rate volatility and currency unions on international trade the panel data bilateral observations for five years during 1970 90 covering 186 countries includes 300 observations in which both countries use the same currency i find a large positive effect of a currency union on international trade and a small negative effect of exchange rate volatility even after controlling for a host of features including the endogenous nature of the exchange rate regime these effects statistically significant imply that two countries sharing the same currency trade three times as much as they would with different currencies currency unions like the european emu may thus lead to a large increase in international trade with all that that entails andrew rose

job queues and wages this paper uses job applications data to investigate the relationship between job queues and wage differentials the main finding is that openings for jobs that pay the minimum wage attract more job applicants than jobs that pay either slightly more or slightly less than the minimum wage this spike in the job application rate distribution suggests that ex ante rents generated for employees by an above market level minimum wage are not completely dissipated by reductions in nonwage benefits in addition we find that highly unionized firms large firms and firms in high wage industries tend to receive relatively many job applicants for openings

lending competition and credit availability for new firms empirical study with the price cost margin in regional loan markets abstract in this paper i present statistical evidence of the impact of lending competition on credit availability for new firms a discrete time duration analysis with respect to the years from the start up to the first loan approval by a commercial bank or a cooperative bank which is collected from survey data in japan shows that the higher price cost margin pcm of banks which reflects the existence of a quasi rent for a bank improves the credit availability for younger firms additional analysis to detect the regional determinants of the pcm of banks shows that the share of larger banks in each local credit market has a negative and significant impact on the pcm in light of the existing empirical finding that smaller banks are more likely to provide relationship banking these findings provide indirect evidence for the hypothesis that the intensity of relationship banking in each local credit market increases the pcm and this encourages banks to extend a loan to new firms so that they can pre empt the opportunity to establish lending relationships that are expected to yield such quasi rents

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

mechanism design by competing sellers a dynamic model with many sellers and buyers is constructed agents failing to trade may trade in the next period an equilibrium is found where sellers hold identical auctions and buyers randomize over the sellers they visit the distribution of buyer valuations is endogenous an auction with efficient reserve is an optimal mechanism from each seller s point of view in spite of the ability of any seller to alter the distribution of buyer types participating in the seller s mechanism by altering the mechanism copyright 1993 by the econometric society

do good workers hurt bad workers or is it the other way around i study the effect of worker heterogeneities on wages and unemployment in a directed search model a worker s productivity in a given firm depends both on his type and on a worker firm specific component firms advertise unconditional wage offers only the resulting equilibrium is inefficient with a too high wage premium for high type workers and too few high type jobs this reduces the welfare of high type workers my findings contrast with the findings in the literature on labor market segmentation where it is argued that the existence of high type workers forces down wages and reduces welfare for low type workers

a more complete conceptual framework for sme finance abstract we propose a more complete conceptual framework for analysis of sme credit availability issues in this framework lending technologies are the key conduit through which government policies and national financial structures affect credit availability we emphasize a causal chain from policy to financial structures which affect the feasibility and profitability of different lending technologies these technologies in turn have important effects on sme credit availability financial structures include the presence of different financial institution types and the conditions under which they operate lending technologies include several transactions technologies plus relationship lending we argue that the framework implicit in most of the literature is oversimplified neglects key elements of the chain and often yields misleading conclusions a common oversimplification is the treatment of transactions technologies as a homogeneous group unsuitable for serving informationally opaque smes and a frequent misleading conclusion is that large institutions are disadvantaged in lending to opaque smes

efficient and competitive rationing abstract the contracts that interest us here are called priority service contracts the salient feature of such contracts is that they specify each customer s priority in obtaining service that is they specify the tank order in which a customer is served out of the available supply until all customers are served or supply is exhausted such contracts essentially establish queues for customers in section 1 the author provides some background about priority service section 2 formulates a basic model and offer several illustrations also describes two main examples that motivate the theoretical development section 3 derives some key results that show how the prices of priority service contracts are designed to induce customers to self select efficient service orders in section 4 the author discusses various ways that state enterprises can organize markets that implement priority service efficiently in section 5 we study the operation of competitive markets for priority service section 6 concludes with some summary remarks two themes are emphasized one is that a state enterprise can promote substantial efficiency gains by substituting priority service for absent spot markets the other is that oligopolistic firms may have insufficient incentives to offer efficient product diversity consequently allocative efficiency depends on entry of numerous firms even so dispersal of supplies among many firms can prevent productive efficiency when there are advantages from pooling supplies

equilibrium mechanisms in a decentralized market abstract a large decentralized market where buyers have private information about the idiosyncratic value of an exchange opportunity with a seller is studied the seller offers the buyer a contract or mechanism as soon as he is matched it is shown that if the discount factor is high enough there will be a symmetric market equilibrium in which all sellers offer simple fixed price mechanisms along the equilibrium path these mechanisms will be ex ante inefficient prices will be too high and the extent of search by buyers too low journal of economic literature classification numbers d82 d83 d44

sorting versus screening search frictions and competing mechanisms in a market where sellers compete by posting trading mechanisms we allow for a general search technology and show that its features crucially affect the equilibrium mechanism price posting prevails when meetings are rival i e when a meeting by one buyer reduces another buyer s meeting probability under price posting buyers reveal their type by sorting ex ante only if the meeting technology is sufficiently non rival price posting is not an equilibrium multiple buyer types then visit the same sellers who screen ex post through auctions

contractual distortions in a market with frictions abstract this paper analyses contract design in a decentralized market environment with frictions while principals e g firms have all contractual power their market power is constrained as agents e g workers can choose to wait and search for better offers we find that results depend crucially on how market frictions affect agents utilities with type independent costs of search and waiting equilibrium contracts are always first best if agents are impatient and discount future payoffs however distortions vanish only gradually in the latter case we also characterize equilibrium offers and show that the market exhibits two types of externalities both of which are absent in the case of type independent costs of search

new firm growth and bank financing this paper examines the extent to which lucas ideas on human capital and jovanovic theorising on learning can provide further insights into the development of small firms it focuses exclusively upon newly established independent firms our evidence from two surveys is that bank lending to new firms is unrelated to many of the personal characteristics of founders which have been argued by other researchers to relate to small firm performance instead lending appears to be more related to whether or not the founder can or chooses to use personal savings and the legal status of the business

competitive equilibrium with search frictions a general equilibrium approach abstract when the trading process is characterized by search frictions traders may be rationed so markets need not clear we build a general equilibrium model with transferable utility where the uncertainty arising from rationing is incorporated in the definition of a commodity in the spirit of the arrow debreu theory prices of commodities then depend not only on their physical characteristics but also on the probability that their trade is rationed the standard definition of competitive equilibrium is extended by replacing the market clearing condition with an exogenous matching function which describes a trading technology that is not frictionless as is typical in search models the matching function relates the rationing probabilities of buyers and sellers to the ratio of buyers to sellers in the market when search frictions vanish our model is equivalent to the continuous assignment model of gretsky et al 20 we adapt their approach which uses linear programming techniques and duality theory to show that a competitive equilibrium exists and is constrained efficient in our environment our competitive equilibrium notion is equivalent to that of directed or competitive search the strength of our formulation and the linear programming approach is that they allow us to generalize the constrained efficiency and existence results in the directed search literature to a much broader class of economies our framework also opens the door to the use of existing algorithms for computing equilibria and taking these models to the data

competitive search equilibrium with multidimensional heterogeneity and two sided ex ante investments abstract we analyze a competitive price taking search model where workers and firms make costly investments e g in education and physical capital respectively before they enter the labor market the environment features transferable utility and symmetric information a key novelty with respect to existing work is that we allow for multidimensional heterogeneity on both sides of the market the probabilities of finding and filling different jobs and the corresponding wages are determined endogenously in equilibrium we show that constrained efficient allocations can be determined as optimal solutions to a linear programming problem whereas the prices supporting these allocations and the associated expected payoffs for workers and firms correspond to the solutions of the dual of that linear program we use this characterization to show that an equilibrium exists and is constrained efficient under very general conditions the fact that linear programming techniques are used for the structural estimation of frictionless matching models suggests that our framework is potentially useful for empirical studies of labor markets and other markets where search frictions are prevalent

bank capital interbank contagion and bailout policy abstract this paper develops a theoretical framework in which asset linkages in a syndicated loan agreement can infect a healthy bank when its partner bank fails we investigate how capital constraints affect the choice of the healthy bank to takeover or liquidate the exposure held jointly with the failing bank and how the bank s ex ante optimal capital holding and possibility of contagion are affected by anticipation of bail out policy capital requirements and the joint exposure we identify a range of factors that strengthen or weaken the possibility of contagion and bailout recapitalization with common stock rather than preferred equity injection dilutes existing shareholder interests and gives the bank a greater incentive to hold capital to cope with potential contagion increasing the minimum regulatory capital does not necessarily reduce contagion while the requirement of holding conservation capital buffer could increase the bank s resilience to avoid contagion

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

subjective games and equilibria applying the concepts of nash bayesian and correlated equilibria to the analysis of strategic interaction requires that players possess objective knowledge of the game and opponents strategies such knowledge is often not available the proposed notions of subjective games and of subjective nash and correlated equilibria replace essential but unavailable objective knowledge by subjective assessments when playing a subjective game repeatedly subjective optimizers converge to a subjective equilibrium we apply this approach to some well known examples including single and multi person multi arm bandit games and repeated cournot oligopoly games journal of economic literature classification numbers c73 and c83

competition policy in banking this paper summarizes some of the arguments relating competition and banking instability draws connections between regulation and competition policy and surveys and analyses the role of competition policy in the banking sector in a financial crisis it is argued that a trade off between competition and stability is bound to persist despite improvements in regulation that the banking sector specificity should be recognized by competition policy and that competition policy and regulation need close coordination copyright 2011 oxford university press

a walrasian theory of markets with adverse selection the paper describes a walrasian theory of markets with adverse selection and shows how refinements of equilibrium can be used to characterize uniquely the equilibrium outcome equilibrium exists under standard conditions it is shown that under certain conditions a stable set exists and is contained in a connected set of equilibria for generic models there exists a stable outcome that is all the equilibria in the stable set have the same outcome these ideas are applied to markets with one sided and two sided uncertainty under standard monotonicity conditions it is shown that the stable outcome is separating and implies a particular pattern of matches of buyers and sellers

bailouts and financial fragility how does the belief that policymakers will bail out investors in the event of a crisis affect the allocation of resources and the stability of the financial system i study this question in a model of financial intermediation with limited commitment when a crisis occurs the efficient policy response is to use public resources to augment the private consumption of those investors facing losses the anticipation of such a bailout distorts ex ante incentives leading intermediaries to choose arrangements with excessive illiquidity and thereby increasing financial fragility prohibiting bailouts is not necessarily desirable however it induces intermediaries to become too liquid from a social point of view and may in addition leave the economy more susceptible to a crisis a policy of taxing short term liabilities in contrast can correct the incentive problem while improving financial stability

a theory of debt and equity diversity of securities and manager shareholder congruence this paper shows how the optimal financial structure of a firm complements incentive schemes to discipline managers and how the securities return streams determine the claim holders incentives to intervene in management the theory rationalizes 1 the multipucity of securities 2 the observed correlation between return streams and control rights of securities and 3 the partial congruence between managerial and equity holder preferences over policy choices and monetary rewards as well as the low level of interference of equity in management the theory also offers new prospects for a reappraisal of the earlier corporate finance literature

bank bailouts and moral hazard evidence from germany we use a structural econometric model to provide empirical evidence that safety nets in the banking industry lead to additional risk taking to identify the moral hazard effect of bailout expectations on bank risk we exploit the fact that regional political factors explain bank bailouts but not bank risk the sample includes all observed capital preservation measures and distressed exits in the german banking industry during 1995 2006 a change of bailout expectations by two standard deviations increases the probability of official distress from 6 6 to 9 4 which is economically significant

small and medium size enterprises access to finance as a growth constraint abstract this paper presents recent research on access to finance by small and medium size enterprises smes smes form a large part of private sector in many developed and developing countries while cross country research sheds doubt on a causal link between smes and economic development there is substantial evidence that small firms face larger growth constraints and have less access to formal sources of external finance potentially explaining the lack of smes contribution to growth financial and institutional development helps alleviate smes growth constraints and increase their access to external finance and thus levels the playing field between firms of different sizes specific financing tools such as leasing and factoring can be useful in facilitating greater access to finance even in the absence of well developed institutions as can systems of credit information sharing and a more competitive banking structure

on the equivalence of walrasian and non walrasian equilibria in contract markets the case of complete contracts this paper explores two models of an economy in which contracts are exchanged in the first model contracts are exchanged on a competitive market in which traders expectations concerning conditions that prevail within specific markets adjust until markets clear in the second model contract designers compete directly against one another by offering alternate contracts it is shown that walrasian allocations correspond with the equilibrium allocations in the model with direct competition when the number of traders is made large furthermore the expectational assumptions that drive the walrasian analysis coincide with off the equilibrium path conjectures in the problem with direct competition