hedge fund seeding via fees for seed swaps under idiosyncratic risk we develop a dynamic valuation model of the hedge fund seeding business by solving the consumption and portfolio choice problem for a risk averse manager who launches a hedge fund through a seeding vehicle this vehicle i e fees for seed swap specifies that a strategic partner seeder provides a critical amount of capital in exchange for participation in the funds revenue our results indicate that the new swap not only solves the serious problem of widespread financing constraints for new and early stage funds esfs managers but can be highly beneficial to both the manager and the seeder if structured properly

ambiguity aversion and optimal derivative based pension investment with stochastic income and volatility abstract this paper provides a derivative based optimal investment strategy for an ambiguity adverse pension investor who faces not only risks from time varying income and market return volatility but also uncertain economic conditions over a long time horizon we derive a robust dynamic derivative strategy and show that the optimal strategy under ambiguity aversion reduces the exposures to market return risk and volatility risk and that the investor holds opposite positions for the two risk exposures in the presence of a derivative ambiguity has distinct effects on the optimal investment strategy more important we demonstrate the utility improvement when considering ambiguity and exploiting derivatives and show that ambiguity aversion and derivative trading significantly improve utility when return volatility increases this improvement becomes more significant under ambiguity aversion over a long investment horizon

agent compensation and the limits of bonding agents in positions of trust may engage in malfeasance which is difficult to detect this paper develops a model in which employers seek to control malfeasance by paying wages contingent on imperfect monitoring and agents may be required to pay entry fees or post bonds we conclude that entry fees which exceed agents assets are ineffective in controlling malfeasance as a result conditions exist in which it is optimal to pay agents more than their opportunity cost such conditions lead to an excess supply of applicants and allow employers to engage in discrimination at zero cost to themselves

a note on merton s optimum consumption and portfolio rules in a continuous time model in the paper optimum consumption and portfolio rules in a continuous time model by r c merton j econ theory 3 1971 373 413 solutions obtained in cases when marginal utility at zero consumption is finite are not feasible while they do satisfy the hamilton jacobi bellman equations they do not represent appropriate value functions because the boundary behavior near zero wealth is not satisfactorily dealt with in this note we specify the boundary behavior and characterize optimal solutions journal of economic literature classification numbers 022 213

reputation and hierarchy in dynamic models of employment the employment relationship with employees ability and their actions both private information thus combining adverse selection with moral hazard is modeled as a repeated game with self enforcing contracts being perfect bayesian nash equilibria under termination contracts the equilibrium contract structure consists of a hierarchy of ranks finite in number even though ability is continuous reputation acts as an effective device for worker discipline without the need for involuntary unemployment selection by bonding is not in general incentive compatible but selection by promotion of employees through the ranks is many other features correspond to observed employment structures

constrained non concave utility maximization an application to life insurance contracts with guarantees abstract we study a problem of non concave utility maximization under a fair pricing constraint the framework finds many applications in for example the optimal design of managerial compensation or equity linked life insurance contracts deriving closed form solutions we observe that the fair pricing constraint will reduce the riskiness of the optimal strategies substantially in an extensive numerical section we analyze innovative retirement products that adapt the investment strategy of the premium pool according to the policyholder s preferences modeled as constant relative risk aversion crra such products are a response to the loss of attractiveness of traditional life insurance contracts with guarantees that are negatively affected by increasing solvency requirements for return guarantees and a general decrease in interest rate levels taking into account that retirement products are usually tax privileged we find that fairly priced guarantee contracts that follow this optimal investment strategy lead to a higher expected utility level than asset investments

risk aversion in a dynamic asset allocation experiment we conduct a controlled laboratory experiment in the spirit of merton 1971 in which subjects dynamically choose their portfolio allocation between a risk free and risky asset using the optimal allocation of an investor with hyperbolic absolute risk aversion hara utility we fit the experimental choices to characterize the risk profile of our participants despite substantial heterogeneity decreasing absolute risk aversion and increasing relative risk aversion are the predominant types we also find some evidence of increased risk taking after a gain finally the session level risk attitudes show a different profile than the individual descriptions of risk attitudes

a general equilibrium model of portfolio insurance this article examines the effects of portfolio insurance on market and asset price dynamics in a general equilibrium continuous time model portfolio insurers are modeled as expected utility maximizing agents martingale methods are employed in solving the individual agents dynamic consumption portfolio problems comparisons are made between the optimal consumption processes optimally invested wealth and portfolio strategies of the portfolio insurers and normal agents at a general equilibrium level comparisons across economies reveal that the market volatility and risk premium are decreased and the asset and market price levels increased by the presence of portfolio insurance article published by oxford university press on behalf of the society for financial studies in its journal the review of financial studies

dynamic portfolio choice with parameter uncertainty and the economic value of analysts recommendations we derive a closed form solution for the optimal portfolio of a non myopic utility maximizer who has incomplete information about the alphas or abnormal returns of risky securities we show that the hedging component induced by learning about the expected return can be a substantial part of the demand using our methodology we perform an ex ante empirical exercise which shows that the utility gains resulting from optimal allocation are substantial in general especially for long horizons and an ex post empirical exercise which shows that analysts recommendations are not very useful

optimal portfolio management with american capital guarantee abstract the aim of the paper is to investigate finite horizon portfolio strategies which maximize a utility criterion when a constraint is imposed on a terminal date european guarantee or on every intermediate date american guarantee we prove the optimality of the option based portfolio insurance method for both european and american cases when an expected crra utility function is maximized the american obpi is fully described in a black scholes environment as well as in the more general case of complete markets using the gittins index techniques developed by el karoui and karatzas 1995 optimality results are extended to general utility functions

technical efficiency unions and decentralized labor contracts abstract this paper explores the link between the presence of unions in the workplace the adoption of decentralized labor agreements and technical efficiency using a large sample of italian manufacturing firms we apply the data envelopment analysis and its robust version based on bootstrap theory to get reliable estimates of technical efficiency at the firm level in a standard first stage we devote particular attention to the specific technology adopted by distinguishing 20 different sector frontiers as well as to the presence of outliers the obtained efficiency scores are analyzed in a second stage applying a truncated regression model estimated via maximum likelihood following the simar and wilson 2007 2011 methodology our results highlight that the presence of workplace unionization decreases the level of technical efficiency while aspects limiting the unions power such as a strong exposure to international markets high debt levels or the prevalence of flexible assets partially reduce the negative effect however when firms adopt decentralized labor contracts agreements the effect on efficiency is positive and partially compensates the negative unions effect

who should buy long term bonds according to conventional wisdom long term bonds are appropriate for conservative long term investors this paper develops a model of optimal consumption and portfolio choice for infinite lived investors with recursive utility who face stochastic interest rates solves the model using an approximate analytical method and evaluates conventional wisdom as risk aversion increases the myopic component of risky asset demand disappears but the intertemporal hedging component does not conservative investors hold assets to hedge the risk that real interest rates will decline long term inflation indexed bonds are most suitable for this purpose but nominal bonds may also be used if inflation risk is low

an isomorphism between asset pricing models with and without linear habit formation we show an isomorphism between optimal portfolio selection or competitive equilibrium models with utilities incorporating linear habit formation and corresponding models without habit formation the isomorphism can be used to mechanically transform known solutions not involving habit formation to corresponding solutions with habit formation for example the constantinides 1990 and ingersoll 1992 solutions are mechanically obtained from the familiar merton solutions for the additive utility case without recourse to a bellman equation or first order conditions more generally recent solutions to portfolio selection problems with recursive utility and a stochastic investment opportunity set are readily transformed to novel solutions of corresponding problems with utility that combines recursivity with habit formation the methodology also applies in the context of hindy huang kreps 1992 preferences where our isomorphism shows that the solution obtained by hindy and huang 1993 can be mechanically transformed to dybvig s 1995 solution to the optimal consumption investment problem with consumption ratcheting this article presents a general method for solving asset pricing or portfolio selection models involving linear habit formation of the type studied by sundaresan 1989 constantinides 1990 detemple and zapatero 1991 ingersoll 1992 chapman 1998 and others the basic idea we pursue is that linear habit formation can be thought of as a redefinition of what constitutes consumption to include not only the current consumption rate but also a fictitious possibly negative consumption rate derived from past actual consumption by pricing out this fictitious consumption rate correctly the economy with linear habit formation can be mechanically transformed to an equivalent economy without habit formation this analysis simplifies and unifies existing results but also generates novel solutions for example together with the results of schroder and skiadas 1997 1999 our method produces optimal lifetime consumption and portfolio policies with preferences that combine recursive utility with habit formation under a stochastic

optimal portfolio choice under loss aversion this paper analyzes the optimal investment strategy for loss averse investors assuming a complete market and general ito processes for the asset prices the loss averse investor follows a partial portfolio insurance strategy when the investor s planning horizon is short less than 5 years he or she considerably reduces the initial portfolio weight of stocks compared to an investor with smooth power utility the empirical section of the paper estimates the level of loss aversion implied by historical u s stock market data using a representative agent model we find that loss aversion and risk aversion cannot be disentangled empirically

stochastic lifestyling optimal dynamic asset allocation for defined contribution pension plans this paper considers the asset allocation strategies open to members of deflnedcontribution pension plans we investigate a model that incorporates three sources of risk asset risk and salary or labour income risk in the accumulation phase and interest rate risk at the point of retirement we propose a new form of terminal utility function incorporating habit formation that uses the plan member s flnal salary as a numeraire the paper discusses various properties and characteristics of the optimal stochastic asset allocation strategy which we call stochastic lifestyling both with and without the presence of non hedgeable salary risk we compare the performance of stochastic lifestlying with some popular strategies used by pension providers including deterministic lifestyling which involves a gradual switch from equities to bonds according to preset rules and static strategies that invest in benchmark mixed funds we flnd that the use of stochastic lifestyling signiflcantly enhances the welfare of a wide range of potential plan members relative to these other strategies jel classiflcation e21 g11 g23

continuous time methods in finance a review and an assessment i survey and assess the development of continuous time methods in finance during the last 30 years the subperiod 1969 to 1980 saw a dizzying pace of development with seminal ideas in derivatives securities pricing term structure theory asset pricing and optimal consumption and portfolio choices during the period 1981 to 1999 the theory has been extended and modified to better explain empirical regularities in various subfields of finance this latter subperiod has seen significant progress in econometric theory computational and estimation methods to test and implement continuous time models capital market frictions and bargaining issues are being increasingly incorporated in continuous time theory the roots of modern continuous time methods in finance can be traced back to the seminal contributions of merton 1969 1971 1973b in the late 1960s and early 1970s merton 1969 pioneered the use of continuous time modeling in financial economics by formulating the intertemporal consumption and portfolio choice problem of an investor in a stochastic dynamic programming setting merton 1973b also showed how such a framework can be used to develop equilibrium asset pricing implications thereby significantly extending the asset pricing theory to richer dynamic settings and expanding the scope of applications of continuous time methods to study problems in financial economics 1 within a span of about 30 years from the publication of merton s inf luential papers continuous time methods have become an integral part of financial economics indeed in certain core areas in finance such as e g asset pricing derivatives valuation term structure theory and portfolio selection continuoustime methods have proved to be the most attractive way to conduct research and gain economic intuition the continuous time approach in these areas has produced models with a rich variety of testable implications the econometric theory for testing continuous time models has made rapid strides in the last decade and has thus kept pace with the impressive progress on the theoretical front one hopes that the actual empirical investigations and estimation using the new procedures will follow suit soon

understanding the wage patterns of canadian less skilled workers the role of implicit contracts understanding the wage patterns of canadian less skilled workers we examine the wage patterns of canadian less skilled male workers over the last quarter century by organizing workers into job entry cohorts we find entry wages for successive cohorts declined until 1997 and then began to recover wage profiles steepened for cohorts entering after 1997 but not for cohorts entering in the 1980s a period when startwageswere relatively high we argue that these patterns are consistent with a model of implicit contracts with recontracting inwhich aworker s currentwage is determined by the best labour market conditions experienced during the current job spell comprendre les patterns de salaires des travailleurs canadiens moins qualifi es le r ole des contrats implicites on examine les patterns de salaires des travailleurs masculins moins qualifi es au cours du dernier quart de si ecle en d epartageant les travailleurs en cohortes diff erentes selon le moment d entr ee dans le monde du travail on d ecouvre que les salaires a l entr ee des cohortes successives ont d eclin e jusqu en 1997 et qu ensuite ils ont commenc e a cro itre les profils de salaires se sont raffermis pour les cohortes entrant dans le monde du travail apr es 1997 mais pas pour les cohortes qui sont entr ees dans le monde du travail dans les ann ees 1980 une p eriode o u les salaires de d epart etaient relativement elev es on sugg ere que ces patterns sont consistants avec un mod ele de contrats implicites de ren egociation qui implique que le salaire courant des travailleurs est d etermin e par les meilleures conditions du march e du travail dont on a fait l exp erience dans la p eriode r ecente de travail

the effect of unionization on productivity evidence from a long panel of coal mines the author measures the effect of unionization on productivity based on a panel of west virginia coal mines from 1897 to 1928 output and inputs are measured in physical terms and most of the mine

immigrants and the dynamics of high wage jobs the authors exploit immigrant identifiers in the canadian labour force survey lfs and the longitudinal dimension of these data to compare the labor force and job dynamics of immigrants and native born workers they examine the role of job as opposed to worker heterogeneity in driving immigrant wage disparities and investigate how the paths into and out of jobs of varying quality compare between immigrant and native born workers they find that the disparity in immigrant job quality which does not appear to diminish with years since arrival reflects a combination of relatively low transitions into high wage jobs and high transitions out of these jobs the former result appears to be due equally to difficulties obtaining high wage jobs directly out of unemployment and to using low wage jobs as stepping stones the authors find little or no evidence however that immigrant job seekers face barriers to low wage jobs

nontraded asset valuation with portfolio constraints a binomial approach we provide a simple binomial framework to value american style derivatives subject to trading restrictions the optimal investment of liquid wealth is solved simultaneously with the early exercise decision of the nontraded derivative noshort sales constraints on the underlying asset manifest themselves in the form of an implicit dividend yield in the risk neutralized process for the underlying asset one consequence is that american call options may be optimally exercised prior to maturity even when the underlying asset pays no dividends applications to executive stock options eso are presented it is shown that the value of an eso could be substantially lower than that computed using the black scholes model we also analyze nontraded payoffs based on a price that is imperfectly correlated with the price of a traded asset the economics of asset pricing when one or more of the assets in the opportunity set are either subject to trading restrictions or entirely nontraded is a matter of great interest viewed from a practical perspective we have several important examples of such assets that are subject to trading restrictions pensions which represent perhaps the most significant of assets held by individual households are subject to trading restrictions it is typically the case that assets in pensions are not available for immediate consumption borrowing against pension assets is subject to significant direct and indirect costs by way of taxes and early withdrawal penalties human capital is another example housing investment is also illiquid and subject to significant transaction costs together pensions human capital and housing constitute a substantial part of a typical household s assets the significance of such nontraded assets for risk premia has already been noted by bewley 1982 there are other circumstances where lack of unrestricted trading plays an important role executive compensation plans usually take the this article was presented at boston university we would like to thank the editor bernard dumas and two anonymous referees for very helpful comments we also thank nalin kulatilaka and seminar participants for useful suggestions ganlin chang fei guan and carlton osakwe provided valuable research assistance j detemple acknowledges support from the social sciences and humanities research

unions and the economy what we know what we should know the wages and working conditions of about one in three canadian workers are determined by collective bargaining in this paper current knowledge about the economic effects of collective bargaining is surveyed unions raise wages by about 15 percent on average and reduce wage dispersion for their members while also reducing profits unions do not seem to reduce employment levels in affected firms or cause nonunion wages to fall efficiency losses due to sectoral misallocation of labor and to strikes are small but some evidence suggests lowered investment in unionized firms union effects on total factor productivity need more careful study using firm level data

union effects in low wage services evidence from canadian childcare empirical evidence presented in this paper based on survey data for canadian childcare workers in 1991 contradicts most stereotypes of the childcare labor market although childcare labor was low wage the authors find that the union impact on wages 15 and fringe benefits was in line with union effects found in other better compensated work and they find substantial returns to education occupational level and firm specific experience the returns to the skill related attributes were blunted somewhat in the union sector except where such returns stood to benefit the median union voter the findings suggest that monetary incentives can be used to encourage improvements in the education experience and skill acquisition of childcare workers unions can improve wages and benefits for childcare workers just as they can for most other workers suggesting the viability of union organizing in this sector despite the traditional barriers to organizing low wage service sector workers in small firms u nion organizing in the growing lowwage female dominated service sector is often regarded as key to offsetting the decline in union membership that is occurring in the areas of traditional union strength the recent success of the service

optimal investment and consumption when allowing terminal debt we analyze a dynamic optimization problem which involves the consumption and investment of an investor with constant relative risk aversion for consumption but with a risk aversion for final wealth which does not necessarily imply that terminal wealth must always be positive we require risk aversion for terminal wealth to be positive but not monotone there is a point of maximal risk aversion at zero wealth and the investor may continue to consume when wealth is negative using dual optimization methods we can derive explicit solutions and we find that the optimal solution differs in a fundamental way from the case where risk aversion is monotone it turns out that the optimal consumption function is convex and concave at different wealth levels and that the optimal investment strategy may no longer be monotone as a function of the remaining time to invest and consume

optimal consumption and portfolio policies when asset prices follow a diffusion process abstract we consider a consumption portfolio problem in continuous time under uncertainty a martingale technique is employed to characterize optimal consumption portfolio policies when there exist nonnegativity constraints on consumption and on final wealth we also provide a way to compute and verify optimal policies our verification theorem for optimal policies involves a linear partial differential equation unlike the nonlinear partial differential equation of dynamic programming the relationship between our approach and dynamic programming is discussed we demonstrate our technique by explicitly computing optimal policies in a series of examples in particular we solve the optimal consumption portfolio problem for hyperbolic absolute risk aversion utility functions when the asset prices follow a geometric brownian motion the optimal policies in this case are no longer linear when nonnegativity constraints on consumption and on final wealth are included by these examples one can see that our approach is much easier than the dynamic programming approach

estimating security price derivatives using simulation simulation has proved to be a valuable tool for estimating security prices for which simple closed form solutions do not exist in this paper we present two direct methods a pathwise method and a likelihood ratio method for estimating derivatives of security prices using simulation with the direct methods the information from a single simulation can be used to estimate multiple derivatives along with a security s price the main advantage of the direct methods over resimulation is increased computational speed another advantage is that the direct methods give unbiased estimates of derivatives whereas the estimates obtained by resimulation are biased computational results are given for both direct methods and comparisons are made to the standard method of resimulation to estimate derivatives the methods are illustrated for a path independent model european options a path dependent model asian options and a model with multiple state variables options with stochastic volatility

the equilibrium allocation of diffusive and jump risks with heterogeneous agents abstract we study a two agent pure exchange equilibrium subject to both nondiversifiable diffusive and jump risks agents can trade in a financial market consisting of a stock market a money market and an insurance market for jump risk heterogeneity is introduced through different levels of relative risk aversion in the framework of standard expected utility we find the surprising result that the less risk averse agent purchases insurance contracts against jump risk from the more risk averse agent this equilibrium allocation is linked to the non linear wealth sharing rule in such an economy and preserves the wealth effects studied by dumas rev financ stud 2 1989 157 in the case of pure diffusive risk since the benchmark economy with homogeneous agents generates no excess uncertainty in the stock market we study the effect on excess volatility and excess jump size solely due to different levels of relative risk aversion we observe 3 excess uncertainty in jump sizes for a reasonable specification of economic fundamentals

valuation optimal asset allocation and retirement incentives of pension plans we provide a framework in which we link the valuation and asset allocation policies of defined benefits plans with the lifetime marginal productivity schedule of the worker and the pension plan formula in turn we examine the retirement policies that are implied by the primitives of the model and the value of pension obligations our model provides an explicit valuation formula for a stylized defined benefits plan the optimal asset allocation policies consist of the replicating portfolio of the pension liabilities and the growth optimum portfolio independent of the pension liabilities we show that the worker will retire when the ratio of pension benefits to current wages reaches a critical value which depends on the parameters of the pension plan and the discount rate using numerical techniques we analyze the feedback effect of retirement policies on the valuation of plans and on the asset allocation decisions article published by oxford university press on behalf of the society for financial studies in its journal the review of financial studies

a model of capital and crises we develop a model in which the capital of the intermediary sector plays a critical role in determining asset prices the model is cast within a dynamic general equilibrium economy and the role for intermediation is derived endogenously based on optimal contracting considerations low intermediary capital reduces the risk bearing capacity of the marginal investor we show how this force helps to explain patterns during financial crises the model replicates the observed rise during crises in sharpe ratios conditional volatility correlation in price movements of assets held by the intermediary sector and fall in riskless interest rates

optimal risk sharing with effort and project choice we consider first best risk sharing problems in which the agent can control both the drift effort choice and the volatility of the underlying process project selection in a model of delegated portfolio management it is optimal to compensate the manager with an option type payoff where the functional form of the option is obtained as a solution to an ordinary differential equation in the general case the optimal contract is a fixed point of a functional that connects the agent s and the principal s maximization problems we apply martingale duality methods familiar from optimal consumption investment problems

understanding the wage patterns of canadian less skilled workers the role of implicit contracts we examine the wage patterns of canadian less skilled male workers over the last quarter century by organizing workers into job entry cohorts we find entry wages for successive cohorts declined until 1997 and then began to recover wage profiles steepened for cohorts entering after 1997 but not for cohorts entering in the 1980s a period when start wages were relatively high we argue that these patterns are consistent with a model of implicit contracts with recontracting in which a worker s current wage is determined by the best labour market conditions experienced during the current job spell on examine les patterns de salaires des travailleurs masculins moins qualifies au cours du dernier quart de siecle en departageant les travailleurs en cohortes differentes selon le moment d entree dans le monde du travail on decouvre que les salaires a l entree des cohortes successives ont decline jusqu en 1997 et qu ensuite ils ont commencea croitre les profils de salaires se sont raffermis pour les cohortes entrant dans le monde du travail apres 1997 mais pas pour les cohortes qui sont entrees dans le monde du travail dans les annees 1980 une periode ou les salaires de depart etaient relativement eleves on suggere que ces patterns sont consistants avec un modele de contrats implicites de renegociation qui implique que le salaire courant des travailleurs est determine par les meilleures conditions du marche du travail dont on a fait l experience dans la periode recente de travail

precautionary savings and the permanent income hypothesis this paper derives the explicit solution of a dynamic stochastic optimal consumption problem for infinitely lived agents whose preferences exhibit in the presence of non diversifiable labour income uncertainty a constant elasticity of intertemporal substitution and constant absolute risk aversion the constancy of the elasticity of intertemporal substitution which implies that marginal utility at zero consumption is infinite guarantees that the non negativity constraint on consumption is never binding along the optimal path the assumption of constant absolute risk aversion allows an explicit computation of human wealth and provides a simple representation of the precautionary savings motive

malfeasance and the foundations for global trade the structure of english trade in the east indies 1601 1833 drawing on a remarkable data set compiled from ships logs journals factory correspondence ledgers and reports that provide unusually precise information on each of the 4 572 voyages taken by english traders of the east india company hereafter eic we describe the eic trade network over time from 1601 to 1833 from structural images of voyages organized by shipping seasons the authors map over time and space the emergence of dense fully integrated global trade networks to reveal globalization long before what is now called globalization the authors show that the integration of the world trade system under the aegis of the eic was the unintended by product of systematic individual malfeasance private trading on the part of ship captains seeking profit from internal eastern trade

unionization and plant closure in canada this paper examines for the first time the role of unionization as a determinant of plant closings in canada using the 1999 to 2001 canadian workplace and employee survey the paper contributes to the north american evidence by showing that the share of a plant s workers covered by collective bargaining has a robust positive partial correlation with the probability of larger plants closing for smaller plants the extent of unionization tends to be much lower and its variation plays no role in plant closure the study highlights the theoretical and statistical importance of examining closure separately for large and small plants ce memoire examine pour la premiere fois le role de la syndicalisation en tant que determinant de la fermeture d usines au canada a l aide des resultats de l enquete sur le milieu de travail et les employes de 1999 et de 2001 emte le texte contribue a enrichir le dossier qui montre qu il y a correlation positive partielle robuste entre la portion des travailleurs d usines couverts par une convention collective et la probabilite de fermeture des grandes usines pour les plus petites usines le degre de syndicalisation tend aetre plus faible et sa variation ne joue pas de role dans le processus de fermeture d usines cette etude montre l importance theorique et pratique qu il y a aetudier separement les fermetures des grandes et des petites usines

an intertemporal general equilibrium asset pricing model the case of diffusion information this paper provides sufficient conditions for the equilibrium price system and a vector of exogenously specified state variable processes to form a diffusion process in a pure exchange economy the conditions involve smoothness of agents utility functions and certain nice properties of the aggregate endowment process and the dividend processes of traded assets in place of the dynamic programming a martingale representation technique is utilized to characterize equilibrium portfolio policies this technique is useful even when there does not exist a finite dimensional markov structure in the economy and thus the markovian stochastic dynamic programming is not applicable a gents are shown to hold certain hedging mutual funds and the riskless asset in contrast to earlier results the market portfolio does not have a special role in hedging since the markets are dynamically complete when there exists a finite dimensional markov system in the economy the dimension of the hedging demand identified through the markovian dynamic programming may be much larger than that identified by the martingale method copyright 1987 by the econometric society

dynamic asset allocation in a mean variance framework the aim of this article is to analyze the portfolio strategies that are mean variance efficient when continuous rebalancing is allowed between the current date 0 and the horizon t under very general assumptions when a zero coupon bond of maturity t exists the dynamic efficient frontier is a straight line the slope of which is explicitly characterized every dynamic mean variance efficient strategy can be viewed as buy and hold combinations of two funds the zero coupon bond of maturity t and a continuously rebalanced portfolio an appropriate dynamic strategy defining the latter is explicitly derived for two particular price processes and comparisons of the efficient frontiers static versus dynamic are provided in these cases

two trees with heterogeneous beliefs spillover effect of disagreement in a model where investors disagree about the fundamentals of two stocks the state price density depends on investor disagreements for both stocks especially the larger stock this implies that disagreement among investors in a large firm has a spillover effect on the pricing of other stocks owned by these investors the pricing effects of investor disagreements crucially depend on the average belief biases empirical findings support the novel model prediction of a disagreement spillover effect and help reconcile some mixed evidence in the literature

equilibrium prices in the presence of delegated portfolio management abstract this paper analyzes the asset pricing implications of commonly used portfolio management contracts linking the compensation of fund managers to the excess return of the managed portfolio over a benchmark portfolio the contract parameters the extent of delegation and equilibrium prices are all determined endogenously within the model we consider symmetric fulcrum performance fees distort the allocation of managed portfolios in a way that induces a significant and unambiguous positive effect on the prices of the assets included in the benchmark and a negative effect on the sharpe ratios asymmetric performance fees have more complex effects on equilibrium prices and sharpe ratios with the signs of these effects fluctuating stochastically over time in response to variations in the funds excess performance

on the elements and practices of monitoring abstract politicians and businessmen have to address the principal agent problem whenever delegation of power occurs installing a monitoring scheme may help to ensure that the officers perform the desired functions checks and balances are the theme in the political arena while management and control are the routines in the business world throughout history numerous monitoring networks have been deployed to overcome the difficulties comparing how those monitoring networks solved the controlling issues may shed light on the incentive structures embodied furthermore the evolution of institutions and organizations could be discerned via the changes in incentives

dynamic asset allocation portfolio decomposition formula and applications a new decomposition of the optimal portfolio in dynamic models with von neumann morgenstern preferences and ito prices is established the formula rests on a change of numeraire that uses pure discount bonds as units of account the dynamic hedging demand has two components the first hedge insures against fluctuations in an optimally designed bond with a maturity date matching the investor s horizon the second hedge immunizes against fluctuations in the market price of risk in the bond numeraire various applications are examined new results concerning the behavior of extremely risk averse individuals the demand for bonds and its long horizon limit and the optimal portfolio in incomplete markets are derived the author 2009 published by oxford university press on behalf of the society for financial studies all rights reserved for permissions please email journals permissions oxfordjournals org oxford university press

consumption and portfolio choice under internal multiplicative habit formation this paper explores the optimal consumption and investment behavior of an individual who derives utility from the ratio between his consumption and an endogenous habit we obtain closed form policies under general utility functionals and stochastic investment opportunities by developing a nontrivial linearization to the budget constraint this enables us to explicitly characterize how habit formation affects the marginal propensity to consume and optimal stock bond investments we also show that in a setting that combines habit formation with epstein zin utility consumption no longer grows at unrealistically high rates at high ages and investments in risky assets decrease

optimal hedging in a dynamic futures market with a nonnegativity constraint on wealth abstract this paper examines the issue of optimal hedging demands for futures contracts from an investor who cannot freely trade his portfolio of primitive assets in the context of lognormal rather than normal returns and of a constant absolute risk aversion utility function in this context the nonnegativity constraint on wealth is binding and the optimal hedging demands are not identical with those encountered in the bulk of the literature which has largely overlooked this problem negative results concerning the derivation of equilibrium in the futures markets and the computation of the open interests then follow

do highly unionized companies compensate their ceos less in periods of financial distress evidence from canada in this article the author studies the strategic interaction between employee stakeholders in particular labor unions and top management and he evaluates the effect of the two parties inherent competitive rent seeking behavior on ceo pay using a panel of firms listed on the s p tsx composite index the author shows that ceo compensation withstood the financial crisis 2008 2011 despite lower and even negative corporate performance further highly unionized companies were associated with higher ceo pay in terms of non equity elements such as salary and pension allocations the presence of unions had no observed effect in reducing bonuses stock options and restricted stock units these findings have implications for the debate on income inequality and the power of unions to bring about change

on the optimality of path dependent structured funds the cost of standardization abstract this paper examines the suitability of an important class of standard financial structured products namely those whose performances are based on smoothing the return of a given risky underlying asset while providing a guarantee at maturity using various assumptions about the customers attitudes towards risk we show that such standardized products are not optimal even if the financial market volatility is constant as a by product we provide in particular the optimal portfolio value in the regret rejoice framework to go further with the notion of aversion of getting a return smaller than the risk free one using the notion of compensating variation we determine for the first time the monetary losses of providing these standardized products instead of the optimal ones to the customers we show that these monetary losses can be very significant when the volatility of the risky asset is stochastic from the operational point of view such results highly suggest to trade on the volatility index vix and or to introduce derivatives written on it when selling standardized funds in order to better meet investors needs and preferences

optimal contracts in a continuous time delegated portfolio management problem this article studies the contracting problem between an individual investor and a professional portfolio manager in a continuous time principal agent framework optimal contracts are obtained in closed form these contracts are of a symmetric form and suggest that a portfolio manager should receive a fixed fee a fraction of the total assets under management plus a bonus or a penalty depending upon the portfolio s excess return relative to a benchmark portfolio the appropriate benchmark portfolio is an active index that contains risky assets where the number of shares invested in each asset can vary over time rather than a passive index in which the number of shares invested in each asset remains constant over time fund managers compensation schemes in a delegated portfolio management setting have been of special interest to both academics and practitioners academic interest stems in part from the rapid growth of managed funds over the last two decades gompers and metrick 1998 report that by december 1996 mutual funds pension funds and other financial intermediaries held discretional control over more than half of the u s equity market it is thus of importance to study the impact of institutional trading on asset prices and to integrate into one model both asset pricing and delegated portfolio management compensation as advocated by brennan 1993 allen and santomero 1997 and allen 2001 it is also important to understand the relationship between a manager s trading strategies and his implicit incentives or career concerns see e g brown harlow and starks 1996 brown goetzmann and park 1997 chevalier and ellison 1999 and chen and pennacchi 2000 these concerns include internal promotion from a small to a large fund higher outside offers and the flow of money through the fund under management 1 the importance of fund manager compensation is also underscored by congressional passage in 1970 of the amendment to

a general equilibrium model of international portfolio choice we investigate in a two country general equilibrium model whether a bias in consumption towards domestic goods will necessarily lead to a preference for domestic securities we develop a model where investors are constrained to consume only from their domestic capital stock and where it is costly to transfer capital across countries in this model investors less risk averse than an investor with log utility bias their portfolios towards domestic assets investors more risk averse than log however prefer foreign assets thus this model suggests that it is unlikely that the portfolios observed empirically can be explained by the high proportion of domestic goods in total consumption we investigate in a two country general equilbrium model whether a bias in consumption toward domestic goods will necessarily lead to a preference for domestic assets in an investor s optimal portfolio we constrain investors to consume only from their domestic capital stock and introduce a proportional cost for transferring goods from one country this cost gives rise to endogenous deviations from the law of one price lop thus the home and foreign investors do not hold identical portfolios we show that an investor s optimal portfolio is biased towards domestic equity only if she is less risk averse than an investor with log utility investors with relative risk aversion greater than one exhibit a preference for the foreign asset this is because the exchange rate derived endogenously is negatively correlated with the return on the foreign asset and therefore the translated return on the foreign stock is less risky than that on the domestic stock thus the results of this model suggest that it is unlikely that the preference for domestic assets that is observed empirically can be explained by the high proportion of domestic goods in total consumption there exists a considerable body of literature documenting the gains from international diversification grubel 1968 was the first to propose that international diversification allows investors to attain lower return variances than those achievable by diversifying domestically this proposition relies on the correlation between stock indices across countries being significantly less

optimal investment with minimum performance constraints abstract we consider the portfolio problem of an investor whose wealth is constrained to be at least as large as that generated by investment in a stochastic benchmark portfolio using standard option pricing results the optimal portfolio policy of a hara utility investor is derived explicitly this policy is shown to be equivalent at any point in time to the investor s optimal unconstrained policy when he has contracted to paying out a proportion of the value of the benchmark portfolio at the terminal date this proportion which lies between zero and one is smaller the more likely it is that the investor will strictly outperform the benchmark over the investment horizon

optimal investment with s shaped utility and trading and value at risk constraints an application to defined contribution pension plan abstract in this paper we investigate an optimal investment problem under loss aversion s shaped utility and with trading and value at risk var constraints faced by a defined contribution dc pension fund manager we apply the concavification and dual control method to solve the problem and derive the closed form representation of the optimal terminal wealth in terms of a controlled dual state variable we propose a simple and effective algorithm for computing the initial dual state value the lagrange multiplier and the optimal terminal wealth theoretical and numerical results show that the var constraint can significantly impact the distribution of the optimal terminal wealth and may greatly reduce the risk of losses in bad economic states due to loss aversion

does option compensation increase managerial risk appetite this paper solves the dynamic investment problem of a risk averse manager compensated with a call option on the assets he controls under the manager s optimal policy the option ends up either deep in or deep out of the money as the asset value goes to zero volatility goes to infinity however the option compensation does not strictly lead to greater risk seeking sometimes the manager s optimal volatility is less with the option than it would be if he were trading his own account furthermore giving the manager more options causes him to reduce volatility managers with convex compensation schemes play an important role in financial markets this paper solves for the optimal dynamic investment policy for a risk averse manager paid with a call option on the assets he controls the paper focuses on how the option compensation impacts the manager s appetite for risk when he cannot hedge the option position on one hand the convexity of the option makes the manager shun payoffs that are likely to be near the money under the optimal policy the manager either significantly outperforms his benchmark or else incurs severe losses furthermore in examples of optimal trading strategies asset volatility goes to infinity as asset value goes to zero yet option compensation does not strictly lead to greater risk seeking as asset value grows large or if the evaluation date is far away the manager moderates asset risk for example if the manager has constant relative risk aversion crra asset volatility converges to the merton constant as asset value goes to infinity in some situations the manager actually chooses a lower asset volatility than he would if he were investing on his own because the leverage inherent in his option magnifies his exposure to the asset volatility in addition with all constant or decreasing absolute risk averse utility functions from the hyperbolic absolute risk averse hara class giving the manager more options causes him to reduce asset volatility in the crra case for example the manager targets a fixed volatility for his personal

non addictive habits optimal consumption portfolio policies abstract we formulate a model of preferences with non addictive habits where consumption is required to be non negative at all times but can fall below a standard of living index that aggregates past consumption we study the consumption portfolio problem taking account of the non negativity constraint on consumption and provide a constructive proof for the existence of an optimal policy on a finite time horizon 0 t we show that the consumption constraint binds up to an endogenous stopping time 0 t after which it remains slack until t a decomposition of constrained consumption involving an asian average strike capped call option is demonstrated

market timing with option implied distributions a forward looking approach we address the empirical implementation of the static asset allocation problem by developing a forward looking approach that uses information from market option prices to this end we extract constant maturity s p 500 implied distributions and transform them to the corresponding risk adjusted ones then we form optimal portfolios consisting of a risky and a risk free asset and evaluate their out of sample performance we find that the use of risk adjusted implied distributions times the market and makes the investor better off than if she uses historical returns distributions to calculate her optimal strategy the results hold under a number of evaluation metrics and utility functions and carry through even when transaction costs are taken into account not surprisingly the reported market timing ability deteriorated during the recent subprime crisis an extension of the approach to a dynamic asset allocation setting is also presented this paper was accepted by wei xiong finance