the economics of exchange rate regimes a review essay the exchange rate regime issue has taken centre stage in discussions of international economic policy much of the profession appears to have been converted to the hypothesis of the vanishing middle regime for countries well integrated into world capital markets there is little if any middle ground between floating exchange rates and monetary unification this paper considers the exchange rate regime issue in the context of recent books on the subject by w max corden and morris goldstein both authors prescribe managed floating exchange rates supplemented with inflation targeting for emerging market economies under managed floating and with a credible monetary policy the public finances in order and strengthened debt management and prudential regulation the exchange rate is free to act as a market gauge for assessing policies and as a mode of conflict resolution both authors also argue however that no exchange rate regime is a holy grail ultimately a credible exchange rate regime depends upon the trust evoked by governments there is no exchange rate regime whether of the managed floating or hard fix variety that can eradicate a history of failed stabilisation attempts

a conditional variance tale from an emerging economy s freely floating exchange rate this article studies daily return and volatility dynamics in the exchange rate of an emerging market economy turkey over the recent floating period we use generalized autoregressive conditional heteroscedastic garch and fractionally integrated garch figarch models with various error distributions findings show that a parsimonious figarch model with an asymmetric error distribution characterizes the daily turkish lira tl returns against us dollar and euro considerably well we find statistically significant asymmetry and peakedness in conditional returns and time varying volatility with long range dependence in conditional volatility long memory finding is robust to different specifications for the conditional returns as well as possible shifts in the return and volatility dynamics over sub periods results in the article show that despite the decline in volatility over the course of the recent float tl returns are still wild compared to developed economies exchange rates during the same period

trade restrictiveness indices in the presence of externalities an application to non tariff measures we extend the trade restrictiveness index approach to the case of market imperfections and domestic regulations addressing them we focus on standard like non tariff measures ntms affecting cost of production and potentially enhancing demand by reducing negative externalities we apply the framework to the database of kee et al 2009 and derive ad valorem equivalents aves for technical measures about 39 of the product lines affected by ntms exhibit negative aves indicating a net trade facilitating effect of these measures accounting for these effects significantly reduces previous measures of countries trade policy restrictiveness obtained while constraining these ntms to be trade reducing

the mirage of floating exchange rates this note summarizes some of the highlights of my longer paper with guillermo calvo fear of floating many emerging market countries have suffered financial crises one view blames soft pegs for these crises adherents to that view suggest that countries move to corner solutions hard pegs or floating exchange rates we analyze the behavior of exchange rates reserves and interest rates to assess whether there is evidence that country practice is moving toward corner solutions we focus on whether countries that claim they are floating are indeed doing so we find that countries that say they allow their exchange rate to float mostly do not there seems to be an epidemic case of fear of floating

the role of collateral in credit markets with imperfect information abstract the paper analyzes the structure of credit market equilibrium under imperfect information collateralization and credit rationing are compared as alternative means to cope with problems of adverse selection and moral hazard it is shown that lenders may use collateral as a self selection and incentive mechanism rationing occurs only if the borrowers collaterizable wealth is too small to allow perfect sorting or to create sufficiently strong incentives whenever there is rationing in an equilibrium some borrowers are charged the maximum amount of collateral

the hyperbolic consumption model calibration simulation and empirical evaluation ur preferences for the long run tend to conflict with our short run behavior when planning for the long run we intend to meet our deadlines exercise regularly and eat healthfully but in the short run we have little interest in revising manuscripts jogging on the stairmaster and skipping the chocolate souffleala mode delay of gratification is a nice long term goal but instant gratification is disconcertingly tempting this gap between long run intentions and short run actions is apparent across a wide range of behaviors including saving choices a 1997 survey found that 76 percent of respondents believe they should be saving more for retirement looking only at respondents who believed they were at an age where you should be seriously saving already the survey found that 55 percent reported being behind in their savings and only 6 percent reported being ahead farkas and johnson 1997 the report on the survey concluded t he gaps between people s atti tudes intentions and behavior are troubling and threaten increased insecurity and dissatisfaction for people when they retire americans are simply not doing what logic and their own reasoning suggests they should be doing a 1993 luntz webber merrill lynch survey found similar answers when baby boomers were asked what percentage of your annual household income do you think you should save for retirement and what percentage of your annual

investment under uncertainty with strategic debt service the presence of a well designed bankruptcy code is an important part of the nancialarchitecture in developed economies by allowing the creditors to seize the assets of theborrowers who fail to make contractual payments the code generates bene cial ex ante e ectson debt capacity and rm value by giving the borrowers options to renegotiate their debtobligations and seek bankruptcy protection the code increases the likelihood that borrowersmay avoid ine cient ex post liquidation as hart 1999 notes the code should balanceex ante rm value maximization with ex post e ciency the bankruptcy codes in di erentcountries weight this tradeo di erently and hence vary in terms of the distribution of rightsand powers between borrowers and lenders in this paper we provide an inter temporal framework to examine how the creditors liquidation rights and the distribution of ex post bargaining powers in uence the rm s in vestment and nancing decisions and a ect ex ante rm value we show that strongerequityholders bargaining power lowers debt capacity reduces rm value and discouragesgrowth option exercising our calibration suggests that the quantitative e ects of ex poststrategic renegotiation on ex ante rm value may be large our paper provides an attempt to integrate nancial architecture into the theory of in vestment growth option exercising by building on two strands of literature investment anddebt pricing we extend the real options approach to investment pioneered by mcdonaldand siegel 1986 and brennan and schwartz 1985 to allow for capital structure decisionsunder strategic debt service we also draw insights from corporate debt pricing capital struc ture literature which focuses on leverage and security pricing after investment has alreadybeen made merton 1974 black and cox 1976 and leland 1994 our paper bridgesthe gap between these two strands of literature by characterizing the optimal investment and nancing decisions and the option value of waiting in closed form we show that the inter action between nancing and investment decisions in the presence of strategic debt servicegenerates new insights and also quantitatively important e ects on ex ante rm value

job search and hyperbolic discounting structural estimation and policy evaluation this paper estimates the structural parameters of a job search model with hyperbolic discounting and endogenous search effort it estimates quantitatively the degree of hyperbolic discounting and assesses its implications for the impact of various policy interventions aimed at reducing unemployment the model is estimated using data on unemployment spells and accepted wages from the national longitudinal survey of youth nlsy the likelihood function explicitly incorporates all the restrictions implied by the optimal dynamic programming solution to the model both observed and unobserved heterogeneity are accounted for the results point to a substantial degree of hyperbolic discounting especially for low and medium wage workers the structural estimates are also used to evaluate alternative policy interventions for the unemployed estimates based on a model with exponential discounting may lead to biased inference on the economic impact of policies jel c6 c73 d90 j64 j68

selling to overconfident consumers consumers may overestimate the precision of their demand forecasts this overconfidence creates an incentive for both monopolists and competitive firms to offer tariffs with included quantities at zero marginal cost followed by steep marginal charges this matches observed cellphone service pricing plans in the us and elsewhere an alternative explanation with common priors can be ruled out in favor of overconfidence based on observed customer usage patterns for a major us cellular phone service provider the model can be reinterpreted to explain the use of flat rates and late fees in rental markets and teaser rates on loans nevertheless firms may benefit from consumers losing their overconfidence

consumer biases and mutual ownership abstract we show how ownership of the firm by its customers as well as nonprofit status can prevent firms from using contractual terms that take advantage of consumer biases by eliminating an outside residual claimant with control over the firm these alternatives to investor ownership reduce the incentive of the firm to offer such terms however customers who are unaware of their behavioral biases may fail to recognize this advantage of non investor owned firms we present evidence from the consumer financial services market that supports our theory comparing contract terms we find that mutually owned firms offer lower penalties such as default interest rates and higher up front prices such as introductory interest rates than do investor owned firms however consumers most vulnerable to these penalties are no more likely to use mutually owned firms

paying not to go to the gym how do consumers choose from a menu of contracts we analyze a novel dataset from three u s health clubs with information on both the contractual choice and the day to day attendance decisions of 7 752 members over three years the observed consumer behavior is difficult to reconcile with standard preferences and beliefs first members who choose a contract with a flat monthly fee of over 70 attend on average 4 3 times per month they pay a price per expected visit of more than 17 even though they could pay 10 per visit using a 10 visit pass on average these users forgo savings of 600 during their membership second consumers who choose a monthly contract are 17 percent more likely to stay enrolled beyond one year than users committing for a year this is surprising because monthly members pay higher fees for the option to cancel each month we also document cancellation delays and attendance expectations among other findings leading explanations for our findings are overconfidence about future self control or about future efficiency overconfident agents overestimate attendance as well as the cancellation probability of automatically renewed contracts our results suggest that making inferences from observed contract choice under the rational expectation hypothesis can lead to biases in the estimation of consumer preferences

investment under uncertainty and time inconsistent preferences abstract while standard real options models assume that agents possess a constant rate of time preference there is substantial evidence that agents are impatient about choices in the short term but are patient when choosing between long term alternatives we extend the real options framework to model the investment timing decisions of entrepreneurs with time inconsistent preferences the impact on investment timing depends on such factors as whether entrepreneurs are sophisticated or naive in their expectations regarding their future time inconsistent behavior and whether the payoff from investment occurs all at once or over time the model is extended to the case of a competitive equilibrium

tax incidence when individuals are time inconsistent the case of cigarette excise taxes abstract one of the most cogent criticisms of excise taxes is their regressivity with lower income groups spending a much larger share of their income on goods such as cigarettes than do higher income groups we argue that traditional quantity based measures of incidence are only appropriate under a very restrictive time consistent model of consumption of sin goods a model that is much more consistent with existing evidence on smoking decisions is a time inconsistent formulation where excise taxes on cigarettes serve a self control function that is valued by smokers who would like to quit but cannot this self control function benefits lower income groups more since they have a significantly higher price sensitivity of smoking calibrations show that as a result cigarette taxes are much less regressive than previously assumed and are even progressive for a wide variety of parameter values

anomalies in intertemporal choice evidence and an interpretation research on decision making under uncertainly has been strongly influenced by the documentation of numerous expected utility eu anomalies behaviors that violate the expected utility axioms the relative lack of progress on the closely related topic of intertemporal choice is partly due to the absence of an analogous set of discounted utility du anomalies we enumerate a set of du anomalies analogous to the eu anomalies and propose a model that accounts for the anomalies as well as other intertemporal choice phenomena incompatible with du we discuss implications for savings behavior estimation of discount rates and choice framing effects

the impact of regulations on agricultural trade evidence from the sps and tbt agreements according to world trade organization rules countries may adopt regulations under the agreements on sanitary and phyto sanitary sps and technical barriers to trade tbt we analyze the structure of these measures in agricultural trade the inventory approach suggests that european countries have among the lowest coverage ratios of all oecd countries using a gravity equation we also estimate their stringency our results suggest that they significantly reduce developing countries exports to oecd countries but do not affect trade between oecd members furthermore european imports are more negatively influenced by sps and tbts than imports of other oecd countries

food security and agricultural protection in south korea south korea has been pursuing food self sufficiency using high tariffs and high administrative prices in key agricultural and food markets using a dual approach to trade and trade restrictiveness indices we analyze the impact of these market distortions on welfare and trade volume then we compute second best distortions which minimize the welfare cost of meeting observed levels of self sufficiency and production we rationalize these second best distortions to what could be claimed as legitimate protection under a food security fs box in world trade organization wto negotiations fs box protection is sensitive to changes in the definition and the extent of the fs objectives we show that fs via production targets and reliance on imports would be more palatable to consumers and trade partners while preserving income transfer to the farm sector the republic of korea has supported its agricultural sector at a relatively high level compared to that of other member countries of the organisation for economic cooperation and development oecd public intervention mainly consists of high production prices supported by government purchases together with high tariffs that protect domestic producers from foreign competition and implicitly tax consumers trade liberalization recently took place in certain sectors and korea is now a major importer of oilseeds and coarse grains however korea only reluctantly exposed its agricultural sector to the provisions of the uruguay round agreement on agriculture uraa iatrc 1997 it has kept very high tariffs in the rice meat and dairy sectors high production subsidies in most other sectors and significant nontariff trade barriers on many commodities including administra

international trade and the environment policy reform in a polluted small open economy abstract this paper investigates sufficient conditions for welfare improving policy reforms in a small open economy facing many trade and pollution distortions we investigate and compare reform in tax regimes quota regimes and mixed regimes where some pollutants are regulated with taxes and others with quotas it is also shown that the welfare benefits of reforming pollution policy are greater in an economy with international factor mobility than in an economy not subject to such mobility

time inconsistency and welfare program participation evidence from the nlsy we empirically implement a dynamic structural model of labor supply and welfare program participation for agents with potentially time inconsistent preferences using panel data on the choices of single women with children from the nlsy 1979 we provide estimates of the degree of time inconsistency and of its influence on the welfare take up decision with these estimates we conduct counterfactual experiments to quantify the utility loss stemming from the inability to commit to future decisions and the potential utility gains from commitment mechanisms such as welfare time limits and work requirements

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

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

domestic distortions and international trade in this paper we develop techniques for measuring the trade policy equivalent of domestic distortions using a distance function approach our measure the trade restrictiveness index is shown to equal the uniform tariff which is welfare equivalent to a given pattern of domestic taxes and subsidies we extend the index to incorporate taxes in markets for nontraded goods and factors of production and illustrate its operationality with an application to liberalisation in mexican agriculture we conclude that our index has considerable potential in empirical work and as an aid to trade negotiators it is widely appreciated that government policies of a purely domestic nature can have major implications for a country s international trade to give just one example such implications were widely discussed in the context of the recent gatt round in which u s negotiators insisted that intra ec agricultural policy should be viewed as trade distorting however analysts and negotiators have not hitherto had access to a conceptual framework which would allow the trade effects of domestic policies to be measured in a consistent way in this paper we propose such a framework and show how it may be implemented empirically of course other attempts have been made to quantify the overall distortionary effects of domestic policies these have involved constructing empirically based indexes such as producer or consumer subsidy equivalents 2 however such measures have no theoretical foundation moreover since they use the shares of different sectors in production or consumption as weights they are likely to be systematically biased for example sectors whose output levels are reduced by high taxation are assigned low weights whereas their true weights should be higher by contrast we show below that our approach is based firmly on welfare economics and correctly uses marginal rather than average production and consumption shares as weights the approach we propose draws on recent work by two of the authors anderson and neary 1990 1992b which dealt with trade distortions only that work developed a scalar index the trade restrictiveness index or tri which equals the equiproportionate rate of trade restriction which is equivalent in welfare terms to

r d investment under time inconsistent preferences abstract we extend the real options model of r d by incorporating time inconsistent preferences we show that time inconsistent preferences can lead to both under investment and over investment in r d which depends on the magnitude of technological uncertainty when the technological uncertainty is low the sophisticated entrepreneurs exercise earlier than the time consistent entrepreneur however the sophisticated entrepreneurs invest later when the technological uncertainty is high

addiction and cue triggered decision processes we propose a model of addiction based on three premises 1 use among addicts is frequently a mistake 2 experience sensitizes an individual to environmental cues that trigger mistaken usage 3 addicts understand and manage their susceptibilities we argue that these premises find support in evidence from psychology neuroscience and clinical practice the model is tractable and generates a plausible mapping between behavior and the characteristics of the user substance and environment it accounts for a number of important patterns associated with addiction gives rise to a clear welfare standard and has novel implications for policy

micro finance competition motivated micro lenders double dipping and default abstract we develop a tractable model of competition among socially motivated mfis so that the objective functions of the mfis put some weight on their own clients utility we find that the equilibrium involves double dipping i e borrowers taking multiple loans from different mfis whenever the mfis are relatively profit oriented further double dipping necessarily leads to default and inefficiency and moreover borrowers who face relatively higher transactions costs optimally decide to double dip interestingly an increase in mfi competition can increase the extent of double dipping and default further the interest rates may go either way with the interest rate likely to increase with more competition if the mfis are very socially motivated

the combination of gravity and welfare approaches for evaluating nontariff measures this article explores the link between gravity and welfare frameworks for measuring the impact of nontariff measures first an analytical approach suggests how to combine a gravity equation with a partial equilibrium model to determine the welfare impact of nontariff measures second an empirical application focuses on the effects of a standard that caps antibiotic residues in crustaceans in the united states the european union canada and japan while the econometric estimation of the gravity equation reports a negative impact on imports welfare evaluations show that in most cases a stricter standard leads to an increase in both domestic and international welfare

optimal capital structure and investment decisions under time inconsistent preferences based on a continuous time model of quasi hyperbolic discounting this paper provides an analytically tractable framework of entrepreneurial firms capital structure and investment decisions under time inconsistent preferences inefficiency in both investment and default is caused due to time inconsistency if we view the time consistent benchmark as efficient compared to the standard trade off theory in corporate finance we clarify that debt financing under time inconsistent preferences brings a new trade off between the alleviation effect on investment inefficiency and the aggravation effect on default inefficiency the impact of time inconsistent preferences depends on the entrepreneurs belief regarding their future time inconsistent behavior i e sophisticated or naive concretely we find that naive entrepreneurs always choose higher leverages while sophisticated ones are more likely to choose lower leverages compared to the time consistent benchmark therefore time inconsistency can explain the observed leverage puzzle i e why firms choose different leverages even with similar fundamentals moreover we demonstrate that time inconsistent preferences delay investment and hasten default due to the interaction among the three effects option value effect payoff value effect and leverage effect in particular naive entrepreneurs invest later and default earlier than sophisticated ones leading to a shorter operating period these results support the empirical findings in entrepreneurial finance

valuation of mortgage interest deductibility under uncertainty an option pricing approach abstract we propose a dynamic option pricing model to quantify the tax shield value of us mortgage interest deduction mid under uncertainty we identify non linear forms both convex and concave regions in the pay off of mid and discuss the implications for the valuation of mid the model provides insights regarding the relationship between the effective mid and a set of underlying variables including income level house price mortgage size and state and local tax rates we also show how the tax shield value of mortgage loans changes with the volatility of underlying processes we apply the model to the case of the optimal choice of adjustable versus fixed rate mortgages and prove that under a mean preserving interest rate an adjustable mortgage always offers a bigger tax saving we use the framework to study how the tax reforms of 2017 have affected the mid benefits of different households and find that no household is expected to receive a larger mortgage deduction under the new law finally we find that by putting a cap on deductible state and local taxes the 2017 reform has significantly reduced the quantitative impact of income and house price volatility on the expected mid value

shrouded attributes consumer myopia and information suppression in competitive markets bayesian consumers infer that hidden add on prices e g the cost of ink for a printer are likely to be high prices if consumers are bayesian firms will not shroud information in equilibrium however shrouding may occur in an economy with some myopic or unaware consumers such shrouding creates an inefficiency which firms may have an incentive to eliminate by educating their competitors customers however if add ons have close substitutes a curse of debiasing arises and firms will not be able to profitably debias consumers by unshrouding add ons in equilibrium two kinds of exploitation coexist optimizing firms exploit myopic consumers through marketing schemes that shroud high priced add ons in turn sophisticated consumers exploit these marketing schemes it is not possible to profitably drive away the business of sophisticates it is also not possible to profitably lure either myopes or sophisticates to nonexploitative firms we show that informational shrouding flourishes even in highly competitive markets even in markets with costless advertising and even when the shrouding generates allocational inefficiencies

real option duopolies with quasi hyperbolic discounting abstract this paper utilizes a real options and game theoretic approach to consider the strategic real investment in a duopoly market under uncertainty with time inconsistent preferences resulting from quasi hyperbolic discounting we show that the time consistent agent becomes the leader when s he interacts with a time inconsistent rival if the rival s time inconsistency is very significant the leader will optimally behave as if competition did not exist if the two rivals have about the same time preferences the leader will accelerate investment and her his investment threshold will accord with the rival s preemptive one which is higher than that determined in the classical time consistent model the inefficiency of investment from preemptive competition is mitigated and even eliminated if the heterogeneity among agents is sufficiently high our model provides a behavioral explanation for the empirical fact that preemption occurs in some markets but is not present in others

disentangling demand enhancing and trade cost effects of maximum residue regulations maximum residue level mrl regulations in plant products can create unnecessary trade barriers on one hand and enhance demand via risk mitigation or quality assurance on the other we stipulate a generalized gravity equation model to disentangle the effects of mrls on the import demand and foreign exporters supply applying the framework to the mrls on pesticides imposed by high income organization for economic co operation and development countries we find that the mrls jointly enhance the import demand and hinder foreign exporters supply in addition exporters from the less and least developed countries are more constrained by the mrls than their competitors from the developed world jel f14 q17

prices as signals of product quality this paper is concerned with the provision of quality in markets in which consumers have only imperfect information the analysis focuses on a market for a product that can be produced at different quality levels all consumers prefer higher to lower quality but they may differ in their willingness to pay for quality producers can produce any quality they like but higher qualities are more costly to produce the information in this market is imperfect in the sense that the exact quality chosen by a firm is known only to the firm itself some information about the quality of a firm s product will however reach its potential customers even if they do not make any special effort to acquire it within the framework suggested here two conclusions are drawn first prices may serve as signals which exactly differentiate the available quality levels that is there exists a fulfilledexpectations equilibrium at which each price signals a unique quality level second the pricesignals are not arbitrary each price signal exceeds the marginal cost of producing the quality it signals such a mark up depends on the nature of the product specific information received by consumers the poorer the information the higher the mark up

the impact of debt financing on entry and exit in a duopoly this article investigates the interaction between market entry company foreclosure and capital structure in a duopoly we find that the order in which firms foreclose is determined not only by differences in firm specific factors but also by common economic factors such as the interest rate and the market profit volatility we extend the exit model by allowing financially distressed firms to renegotiate their debt contracts through a one off debt exchange offer we find that firms with high bankruptcy costs or with prospects of profit improvement can get bigger reductions on their debt repayments investigating market entry we find that financial vulnerability of the incumbent induces earlier entry article published by oxford university press on behalf of the society for financial studies in its journal the review of financial studies

self coordination in time inconsistent stochastic decision problems a planner doer game framework abstract time inconsistency has been a thorny issue in many economic and financial decision making problems especially when risk measures are involved in performance criteria we develop in this paper a two tier planner doer game framework with self coordination by aligning the global interest of the planner and the local interests of the doers by applying suitable penalty functions a degree of internal harmony measured quantitatively by the expected cost of self coordination can be achieved by the self coordination policy we establish an axiom system for modified preferences under which the self coordination policy can be obtained by solving a corresponding optimization problem we then apply our game framework successfully in dynamic mean variance portfolio selection

optimal sin taxes abstract we investigate sin taxes on unhealthy items such as fatty foods that people may by their own reckoning consume too much of we employ a standard optimal taxation framework but replace the standard assumption that all consumers have 100 self control with an assumption that some consumers may have some degree of self control problems we show that imposing taxes on unhealthy items and returning the proceeds to consumers can generally improve total social surplus because such taxes counteract over consumption by consumers with self control problems while at the same time they naturally redistribute income to consumers with no self control problems who consume less such taxes can even create pareto improvements finally we demonstrate with some simple numerical examples that even if the population exhibits relatively few self control problems optimal taxes can still be large

distinguished lecture on economics in government exchange rate regimes is the bipolar view correct the choice of appropriate exchange rate regime which for economies with access to international capital markets increasingly means a move away from the middle ground of pegged but adjustable fixed exchange rates towards the two corner regimes of either flexible exchange rates or a fixed exchange rate supported if necessary by a commitment to give up altogether an independent monetary policy lawrence h summers 2000 p 8

foreign exchange intervention in emerging markets a survey of empirical studies nowadays foreign exchange interventions occur in emerging market economies whereas empirical studies on interventions mainly refer to advanced economies however interventions in emerging markets are different from those in advanced economies they occur regularly and central banks have considerable leverage derived from relatively high reserves some non sterilisation the central bank s information advantage and capital controls consequently these interventions often successfully impact the level and volatility of exchange rates nevertheless more research on interventions in emerging markets is needed analysing the influence of heterogeneous institutional circumstances examining the role of central bank communication and using high frequency data

optimal priority structure capital structure and investment we study the interaction between financing and investment decisions in a dynamic model where the firm has multiple debt issues and equityholders choose the timing of investment jointly optimal capital and priority structures can virtually eliminate investment distortions because debt priority serves as a dynamically optimal contract examining the relative efficiency of priority rules observed in practice we develop several predictions about how firms adjust their priority structure in response to changes in leverage credit conditions and firm fundamentals notably financially unconstrained firms with few growth opportunities prefer senior debt while financially constrained firms with or without growth opportunities prefer junior debt moreover lower rated firms are predicted to spread priority across debt classes finally our analysis has a number of important implications for empirical capital structure research including the relations between market leverage book leverage and credit spreads and tobin s q the influence of firm fundamentals on the agency cost of debt and the conservative debt policy puzzle the author 2011 published by oxford university press on behalf of the society for financial studies all rights reserved for permissions please e mail journals permissions oup com oxford university press

the mercantilist index of trade policy we introduce an index of trade policy restrictiveness defined as the uniform tariff that maintains the same trade volume as a given tariff quota structure our index overcomes the problems of the trade weighted average tariff it avoids substitution bias correctly accounts for general equilibrium transfers and takes import volume instead of welfare as benchmark empirical applications to international cross section and time series comparisons of trade policy confirm our theoretical results trade weighted average tariffs generally underestimate the true height of tariffs as measured by the trade volume equivalent index this in turn always underestimates the welfare equivalent index

learning self control this article examines how a decision maker who is only partially aware of his temptations learns about them over time in facing temptations individuals use their experience to forecast future self control problems and choose the appropriate level of commitment i demonstrate that rational learning can be perpetually partial and need not result in full sophistication the main result of this article characterizes necessary and sufficient conditions for learning to converge to full sophistication i apply this result to a consumption savings environment in which a decision maker is tempted by present bias and establish a learning theoretic justification for assuming sophistication in this setting an individual who finds himself continuously repudiating his past plans may learn to distrust his future behavior and may do something about it strotz 1955

overnight borrowing interest rates and extreme value theory we examine the dynamics of extreme values of overnight borrowing rates in an inter bank money market before a financial crisis during which overnight borrowing rates rocketed up to simple annual 4000 percent it is shown that the generalized pareto distribution fits well to the extreme values of the interest rate distribution we also provide predictions of extreme overnight borrowing rates before the crisis the examination of tails extreme values provides answers to such issues as what are the extreme movements expected in financial markets have we already seen the largest moves is there a possibility for even larger movements and are there theoretical processes that can model the type of fat tails in the observed data the answers to such questions are essential for proper management of financial exposures and laying ground for regulations

futile attempts at self control we investigate costly yet futile attempts at self control when consumption of a harmful product has a binary breakdown no breakdown nature and individuals tend to underestimate their need for self control considering time inconsistent preferences as well as temptation disutility we show that becoming more sophisticated can decrease welfare and investigate what kind of mistaken beliefs lead to low welfare with time inconsistent preferences being close to perfectly understanding one s preferences but assigning zero probability to true preferences induces the worst outcome jel d03 d11 d91

uncertain demand consumer loss aversion and flat rate tariffs we consider a model of firm pricing and consumer choice where consumers are loss averse and uncertain about their future demand possibly consumers in our model prefer a flat rate to a measured tariff even though this choice does not minimize their expected billing amount a behavior in line with ample empirical evidence we solve for the profit maximizing two part tariff which is a flat rate if a marginal costs are not too high b loss aversion is intense and c there are strong variations in demand moreover we analyze the optimal nonlinear tariff this tariff has a large flat part when a flat rate is optimal among the class of two part tariffs

choice and procrastination author s o donoghue ted rabin matthew abstract recent models of procrastination due to self control problems assume that a procrastinator considers just one option and is unaware of her self control problems we develop a model where a person chooses from a menu of options and is partially aware of her self control problems this menu model replicates earlier results and generates new ones a person might forego completing an attractive option because she plans to complete a more attractive but never to be completed option hence providing a non procrastinator additional options can induce procrastination and a person may procrastinate worse pursuing important goals than unimportant ones

price complexity and buyer confusion in markets abstract this paper reports a duopoly market experiment that examines the effects of price complexity on market prices in my experimental posted offer markets each seller offers an identical good to buyers with homogeneous preferences first sellers simultaneously decide on the price and the tariff structure of their good then buyers make their choices each seller can choose to have a one two or three part tariff the tariff structure affects neither the value nor the price of the good but influences buyers ability to calculate the good s price the main results show that high price sellers choose high complexity more often than low price sellers if buyers are simulated in accordance with the bounded rationality model of carlin 2009 however the evidence for this effect is weaker if the buyers are human subjects importantly prices are higher when the sellers can confuse buyers using price complexity than when sellers interact with perfectly rational robot buyers

trade reform with quotas partial rent retention and tariffs quotas are the predominant means of protection in developed countries with quota rents commonly shared between exporter and importer this paper derives shadow prices appropriate to evaluating trade reform under these circumstances and provides a number of useful sufficient conditions for welfare improving piecemeal reform in doing so the authors apply the distorted quantity constrained expenditure function and use implicit separability to derive more powerful results than have previously been available

overconfidence and excess entry an experimental approach psychological studies show that most people are overconfident about their own relative abilities and unreasonably optimistic about their futures e g shelly e taylor and j d brown 1988 neil d weinstein 1980 when assessing their position in a distribution of peers on almost any positive trait like driving ability ola svenson 1981 income prospects or longevity a vast majority of people say they are above the average although of course only half can be if the trait is symmetrically distributed this paper explores whether optimistic biases could plausibly and predictably influence economic behavior in one particular setting entry into competitive games or markets many empirical studies show that most new businesses fail within a few years for example using plant level data from the u s census of manufacturers spanning 1963 1982 timothy dunne et al 1988 estimated that 61 5 percent of all entrants exited within five years and 79 6 percent exited within 10 years most of these exits are failures see also dunne et al 1989a 1989b d shapiro and r s khemani 1987

trade and pollution linkages piecemeal reform and optimal intervention we demonstrate how coordinated trade and environmental policy can achieve ef ficiency and pollution mitigation gains superior to those obtained without such coordination we show how trade and environment linkages give rise to complex second best policy issues and derive optimal interventions and sufficient conditions for welfare improving piecemeal trade and environmental policy reforms in a small economy changing trade and environ ment distortions in proportion to their optimal levels increases welfare we decompose the economic and environment effects of policies targeted at trade and pollution in both con sumption and production we also decompose production responses into output adjustments and changes in pollution intensities

competitive pooling rothschild stiglitz reconsidered we build a model of competitive pooling which incorporates adverse selection and signaling into general equilibrium pools are characterized by their quantity limits on contributions households signal their reliability by choosing which pool to join in equilibrium pools with lower quantity limits sell for a higher price even though each household s deliveries are the same at all pools the rothschild stiglitz model of insurance is included as a special case we show that by recasting their hybrid oligopolistic competitive story in our perfectly competitive framework their separating equilibrium always exists even when they say it does not and is unique

the failure of competition in the credit card market the bank credit card market containing 4 000 firms and lacking regulatory barriers casually appears to be a hospitable environment for the model of perfect competition nevertheless this article reports that credit card interest rates have been exceptionally sticky relative to the cost of funds moreover major credit card issuers have persistently earned from three to five times the ordinary rate of return in banking during the periods 1983 88 the failure of the competitive model appears to be partly attributable to consumers making credit card choices without taking account of the very high probability that they will pay interest on their outstanding balances copyright 1991 by american economic association

modelling the impact of non tariff measures on supply chains in asean this paper explores the impact of reducing non tariff measures ntms in major asean countries new econometric estimates of the impact of different types of ntms are used in a global supply chain model to separately model the effects on intermediate products and those sold to final consumers we also distinguish between whether the ntm cost burden is directed at exporters or importers this paper makes important advances in modelling the heterogeneity of ntms offering much richer policy analysis of the impact of ntms on supply chains in the asia pacific region than has previously been possible we illustrate the benefits both to the major asean countries and to their trading partners from the partial liberalisation by asean countries of their most trade distorting types of ntms such liberalisation increases the gdp and welfare of all countries with the effect particularly pronounced for the major asean countries themselves especially vietnam and the philippines as trade in plant products and animal products is particularly affected by ntms these sectors show the largest expansion of trade

the theory of moral hazard and unobservable behaviour part i principal agent models are studied in which outcomes conditional on the agent s action are uncertain and the agent s behaviour therefore unobservable for a model with bounded agent s utility conditions are given under which the first best equilibrium can be approximated arbitrarily closely by contracts relating payment to observable outcomes for general models it is shown that the solution may not always be obtained by using the agent s first order conditions as constraint general conditions of lagrangean type are given for problems in which contracts are finite dimensional 1 the moral hazard situation

the dynamics of a newly floating exchange rate the turkish case in recent years many emerging market economies have switched or are in the process of switching to a floating exchange rate regime most of these economies have a history of high inflation and a high level of foreign currency denominated debt therefore the stability of the exchange rate and the dynamics of its volatility are more crucial than before this paper analyses the dynamics of exchange rate in turkey in the aftermath of recent float in february 2001 the turkish experience is a particularly important one and provides valuable lessons for other countries as the central bank is trying to simultaneously contain the volatility of exchange rate and pursue an implicit inflation targeting policy the reported findings indicate that the central bank policies accompanied with favourable external factors were effective in taming the volatility of the exchange rate in a relatively short period of time however there is a significant real appreciation of the currency during the same period given the

a tail index tour across foreign exchange rate regimes in turkey this article uses daily foreign exchange data in the usd trl foreign exchange market to test for structural breaks due to exchange rate regime switches the analysis focus on extreme movements of exchange rate returns across different regimes using tail index indicators sequential and rolling tests developed by quintos et al 2001 are used to identify the dates of breaks in the turkish exchange rate for the period 28 january 1980 to 11 october 2004 and for the sub periods which cover the fixed exchange rate regime from 28 january 1980 to 22 february 2001 and the flexible exchange rate regime from 23 february 2001 to 11 october 2004 compelling evidence for breaks in the tail index is found not only across but also within different exchange rate regimes especially within the fixed regime moreover breakpoint dates are clustered right before the crisis in 2001 this makes the tail index indicator a fairly good candidate for a variable to be used in early warning systems for currency crises

exploiting naivete about self control in the credit market we develop a model of the credit market where competitive lenders oer long term contracts specifying a non linear schedule of possible repayment schedules to borrowers who may dier both in their taste for immediate gratication and their prior beliefs about that taste the equilibrium contract to a borrower with given beliefs is discontinuous it features an advantageous option involving fast repayment and a penalty for deviating and repaying later these predictions seem to resemble some salient features of many credit card and mortgage contracts for fully sophisticated borrowers the discontinuity acts as a commitment device and yields fast repayment but all other borrowers even those with an arbitrarily small amount of naivete end up delaying repayment despite the penalty and receive little benet from commitment furthermore because they believe they will repay early they underestimate the cost of credit and hence borrow too much non sophisticated borrowers cross subsidize sophisticated borrowers while sophisticated borrowers discipline rms by preventing very exploitative contracts we identify natural conditions under which the above results obtain even if

trade policy trade costs and developing country trade this paper briefly reviews new indices of trade restrictiveness and trade facilitation that have been developed at the world bank the paper also compares the trade impact of different types of trade restrictions applied at the border with the effects of domestic policies that affect trade costs based on a gravity regression framework the analysis suggests that tariffs and non tariff measures continue to be a significant source of trade restrictiveness for low income countries despite preferential access programs this is because the value of trade preferences is quite limited a new measure of the relative preference margin developed in the paper reveals that this is very low for most country pairs most countries with very good duty free access to a market generally have competitors that have the same degree of access the empirical analysis suggests that measures to improve logistics performance and facilitate trade are likely to have the greatest positive effects in expanding developing country trade increasing the trade impacts of lowering remaining border barriers by a factor of two or more

measuring the restrictiveness of trade policy this article provides an introduction to the trade restrictiveness index tri which equals the uniform tariff that is welfare equivalent to a given pattern of trade protection unlike standard measures of trade restrictiveness the tri has a solid theoretical basis can incorporate both tariffs and quantitative restrictions and can be adapted to construct the trade policy equivalent of domestic distortions the article compares a number of applications and describes procedures for operationalizing the tri on a personal computer the authors conclude that the tri has considerable potential in empirical work