how to value employee stock options one of the arguments often used against expensing employee stock options is that calculating their fair value at the time they are granted is very difficult this article presents an approach to calculating the value of employee stock options that is practical easy to implement and theoretically sound it explicitly considers the vesting period the possibility that employees will leave the company during the life of the option the inability of employees to trade their options and the relevant dilution issues this approach is an enhancement of the approach suggested by the financial accounting standards board s statement of financial accounting standards no 123 because it does not require an arbitrary reduction in the life of the option to allow for early exercise caused by the inability of employees to trade their options

using auctions to price employee stock options the case of zions bancorporation esoars the first empirical analysis of zions bancorporation s 2006 and 2007 auctions of employee stock option appreciation rights securities esoars this study examined 1 the impact of auction rules on bidding strategies and allocations 2 the efficiency of the auction clearing prices and 3 the value gap between esoars auction clearing prices and various model based estimates it found that the design features of the auctions e g ending rules significantly affected bidding strategies but not final allocations which remained highly concentrated it also found that the clearing prices 1 displayed high price elasticities of demand suggesting efficient price discovery and 2 were low relative to some but not all model based estimates these findings suggest design improvements that might benefit auctions of other illiquid derivatives e g banks troubled assets currently being considered by the u s government

valuing employee stock options does the model matter in this numerical analysis of models for valuing employee stock options the focus is on the impact of a model on the resulting option prices and the sensitivity of pricing differences between models with respect to changes in the parameters for most models the price reduction relative to standard options is uniquely determined by the expected life of the option in fact with the exception of the financial accounting standards board 123 model pricing differences are negligible if the models are calibrated to the same expected life of the option consequently the application of models with several hard to estimate parameters such as the utility maximizing model can be greatly simplified by calibration because expected life is easier to estimate than utility parameters

psychological factors and stock option exercise we investigate stock option exercise decisions by over 50 000 employees at seven corporations controlling for economic factors psychological factors influence exercise consistent with psychological models of beliefs employees exercise in response to stock price trends exercise is positively related to stock returns during the preceding month and negatively related to returns over longer horizons consistent with psychological models of values that include reference points employee exercise activity roughly doubles when the stock price exceeds the maximum price attained during the previous year

the use of stock based pay for sorting an empirical analysis of compensation for new ceos examining stock based compensation for newly hired ceos this article finds that the sensitivity of stock based pay to performance is higher for new economy young and volatile firms of the components of stock based pay it is option grants that generate such variation across firms it also finds that this cross firm variation in pay performance sensitivity is more pronounced for the ceo s first year in office these findings support the view that firms use stock based pay to new ceos for sorting

the intertemporal behavior of economic profits abstract the intertemporal behavior of economic profits is examined tests show that profit rates are not independent of their initial level a set of tests for the nature of the profit adjustment mechanism is proposed and a stock market based profit measure is employed despite intertemporal dependence we find evidence of profit rate adjustment patterns roughly consistent with neoclassical theory for negative profits in some but not all cases the probability of maintaining positive profits appears less than the probability of moving toward zero profits

market based empirical research in accounting a review interpretation and extension a decade and a half of the most concerted and ambitious research effort in accounting history is evaluated here it is the search into the relationship between publicly disclosed accounting information and the consequences of the use of this information by the major group of usersequity investors as such consequences are reflected in characteristics of common stocks traded in major exchanges this research effort known as market based accounting research mbar obtained its impetus from major developments in finance theory during the late 1950s and early 1960s these were the portfolio selection theory and its offspring the capital asset pricing model capm and the concept of informationally efficient capital markets ecm subsequent developments in information economics agency theory and optimal incentive signaling models were quickly incorporated into mbar while the impetus to this line of research came from other disciplines accounting was not only a beneficiary but also to a modest extent a benefactor mbar is relevant to the study of capital market efficiency the capm information economics and regulation this contribution distinguishes mbar from most accounting areas whose contributions to other disciplines are negligible in

exercise behavior valuation and the incentive effects of employee stock options abstract we use a large database on eso exercises to document characteristics of exercise behavior and calibrate a utility based model for measuring how differences in exercise behavior are manifested in option values and incentives option values and incentives computed from the model calibrations are compared to those computed from models used to value tradable options our analysis provides guidance to both academics and practitioners about how differences in exercise behavior and model choice affect measures of eso values and incentives and underscores the importance of gaining a thorough understanding of the underlying economic forces that affect the behavior of eso holders

clinching auctions with online supply abstract auctions for perishable goods such as internet ad inventory need to make real time allocation and pricing decisions as the supply of the good arrives in an online manner without knowing the entire supply in advance in this work we consider a multi unit model where buyers have global budget constraints and the supply arrives in an online manner our main contribution is to show that for this setting there is an individually rational incentive compatible and pareto optimal auction that allocates these units and calculates prices on the fly without knowledge of the total supply we do so by showing that the adaptive clinching auction satisfies a supply monotonicity property finally while our main technical result concerns multi unit supply we propose a formal model of online supply that captures scenarios beyond multi unit supply and has applications to sponsored search

indexed executive stock options abstract we design and derive a pricing model for an executive stock option with a strike price indexed to a benchmark and investigate its valuation and incentive implications in both up and down markets the indexed option filters out common risks beyond the executive s control thereby increasing the efficiency of incentive contracts the indexed option has a different payoff structure and much lower initial value than a traditional option incentive effects of the indexed option also differ from those of traditional options we design an optional penalty function to reduce the payoff if executives manipulate specified model parameters such as volatility

the subjective and objective evaluation of incentive stock options owners of incentive options invariably hold undiversified portfolios this paper derives a model for the subjective and objective values of such options the subjective value the value to the holder is less than the market value because the option is held in an undiversified portfolio and because it is exercised suboptimally from the market perspective the objective value is the cost to the firm of issuing the option and lies between the market and subjective values this value recognizes the suboptimal exercise but not the undiversified discount the model which is the black scholes model with modified parameters is simple to use

backdating executive stock options an ex ante valuation abstract when backdating executive stock options esos the exercise price is set in favor of the recipient executive relative to a non backdated benchmark we find an ex ante upper bound for the cost of backdating to shrink from 10 to about 3 7 as a consequence of the regime change represented by the sarbanes oxley act sox we frame the backdating behavior as a compound exotic option considering both simple and extended models of the underlying eso in the latter case we draw on the analytical eso models of sircar and xiong 2007 post sox we use a longstaff schwartz inspired least squares monte carlo approach

the cost of employee stock option grants an empirical analysis this study presents empirical evidence on the ex post costs of employee stock option eso grants to issuing firms and examines whether the black scholes 1973 model provides reasonable estimates of these values because there are no market prices for esos the traditional avenues for testing option pricing models are unavailable this research relies instead on techniques from the economic forecasting literature viewing model values as forecasts of the options payoff the theoretically appropriate rate at which to discount eso payoffs is derived under the maintained hypothesis that the black scholes model is valid this rate is used in estimating ex post eso costs at the time of grant which are then compared with black scholes estimates using theil s 1966 tests of forecast rationality based on a sample of 966 eso grants over 1963 1984 the results suggest that the black scholes model adjusted for concavity in the time to exercise using the hemmer matsunaga and shevlin 1994 procedure appears to provide reasonable estimates of ex post eso costs for the average eso grant however there is significant variability in the amount of model error on an individual grant basis

a general framework for evaluating executive stock options abstract motivated by recent recommendations by both european and american accounting standards boards that executive stock options be expensed in firms statements we provide an analytical and flexible framework for their evaluation our approach takes into account the vesting period american style resetting and reloading provisions that are features of many option programs and also considers the trading restriction on executives we identify a recursive structure in the stream of options that are granted to the executive over the course of her employment by exploiting this we are able to obtain a near explicit formula for the option value this enables us to discuss the joint effects of the different features on the exercising strategies and firms granting cost especially we highlight some significant interactions among these features

book tax conformity earnings persistence and the association between earnings and future cash flows abstract calls for eliminating differences between accounting earnings and taxable income in the us have been debated extensively proponents of increased book tax conformity argue that tax compliance will increase and earnings quality will improve opponents argue that earnings quality will decline we examine whether the level of required book tax conformity affects earnings persistence and the association between earnings and future cash flows we develop a comprehensive book tax conformity measure and find that earnings have lower persistence and a lower association with future cash flows when conformity is higher our evidence suggests that increased book tax conformity may reduce earnings quality

too much pay performance sensitivity abstract we examine the relation between pay performance sensitivity pps the convexity of managerial compensation vega and future stock risk and returns for a large sample of firms between 1992 and 2004 higher pps and vega are both associated with lower future stock returns part of this negative relation can be explained by risk averse managers decreasing equity risk in response to increases in pps and vega however even after correcting for lower future risk future stock returns are negatively associated with the magnitude of option sensitivity this finding is consistent with previous studies that link high option compensation to manager owner agency problems

market valuation and deregulation of electric utilities abstract this study examines the effect of ongoing deregulation in the electric utility industry on the relation between market value book value and earnings we predict that deregulation decreases increases the relative importance of book value earnings in explaining price we test this prediction by examining changes in the value relevance of book value and earnings during the 1988 1996 time period for a sample of large investor owned electric utilities we find that the regression coefficients and incremental explanatory power related to book value earnings have decreased increased over this time period these results are generally robust in sensitivity analysis

human capital bankruptcy and capital structure we derive a firm s optimal capital structure and managerial compensation contract when employees are averse to bearing their own human capital risk while equity holders can diversify this risk away in the presence of corporate taxes our model delivers optimal debt levels consistent with those observed in practice it also makes a number of predictions for the cross sectional distribution of firm leverage consistent with existing empirical evidence it implies persistent idiosyncratic dierences in leverage across firms an important new empirical prediction of the model is that ceteris paribus firms with more leverage should pay higher wages

stock splits and stock dividends why who and when this study investigates empirically why firms split their stock or distribute stock dividends and why the market reacts favorably to these distributions the findings suggest that stock splits are mainly aimed at restoring stock prices to a normal range some support can also be found for the oft mentioned signalling motive of stock splits stock dividends are altogether different from stock splits and they appear to be a decreasing phenomenon the clue to stock dividend distributions may lie in their perceived substitution for relatively low cash dividends neither stock splits nor stock dividends are recent phenomena the latter dates back to the elizabethan age among the first to declare such dividends was the east india company which while enjoying great prosperity declared in 1682 a stock dividend of one hundred percent during the eighteenth and nineteenth centuries stock dividends were quite frequently distributed by british companies in the united states an early and frequently discussed stock dividend distribution was that of the new york central railroad just prior to its union with the hudson river railroad in 1869 surprisingly stock dividends were quite popular in the u s despite their being subject to federal income tax thus for example during the seven years prior to 1922 the year in which the supreme court exempted the recipients of stock dividends from taxes the ratio of stock dividends to all dividend distributions was 14 5 percent this ratio increased to a staggering forty seven percent during the seven years succeeding the supreme court decision during 1936 to 1937 some american companies distributed stock dividends to avoid the undistributed profit tax

employee stock option valuation with an early exercise boundary many companies are recognizing that the black scholes formula is inappropriate for employee stock options esos and are moving toward lattice models for accounting or decision making purposes in the most influential of these models the assumption is that employees exercise voluntarily when the stock price reaches a fixed multiple of the strike price effectively introducing a horizontal exercise boundary into the lattice in practice however employees make a trade off between intrinsic value captured and the opportunity cost of time value forgone the model proposed here explicitly recognizes and accounts for this reality and is intuitively appealing easily implemented and compliant with u s accounting standards

the sensitivity of american options to suboptimal exercise strategies the value of american options depends on the exercise policy followed by option holders market frictions risk aversion or a misspecified model for example can result in suboptimal behavior we study the sensitivity of american options to suboptimal exercise strategies we show that this measure is given by the gamma of the american option at the optimal exercise boundary more precisely if b is the optimal exercise price but exercise is either brought forward when or delayed until a price b has been reached the cost of suboptimal exercise is given by b b b 2 where b denotes the american option gamma therefore the cost of suboptimal exercise is second order in the bias of the exercise policy and depends on gamma this result provides new insights on american options

broad based employee stock options grants and ipo firms this paper examines the broad based grant of employee stock options esos in the period following the initial public offering ipo stock option grants are used to reduce the negative effects of conflicts of interests associated with a firm s going public the study documents that option grants can be seen as corporate governance instruments for a number of model specifications also it is found that there is a robust relation between option grants and market and accounting returns respectively to the best of the authors knowledge no previous study has investigated the determinants of the grants of employee stock options in the post ipo period to both upper level and lower level executives during a period of sixteen years because the cross sectional data of this study amply encompasses more than a business cycle it is possible to examine the grants of esos across tight and soft labour markets during the former type of labour market it appears that more options are granted also the empirical res

on the job search and the wage distribution the article structually estimates an on the job search model of job separations given each employer pays observably equivalent workers the same but wages are dispersed across employers an employer s separation flow is the sum of an exogenous outflow unrelated to the wage and a job to job flow that decreases with the employer s wage using data from the danish integrated database for labour market research the empirical results imply as predicted by theory that search effort declines with the wage furthermore the estimates explain the employment effect defined as the horizontal difference between the distribution of wages earned and the wage offer distribution

revisiting the incentive effects of executive stock options abstract we develop a multiperiod framework to evaluate the incentive effects of executive stock options esos for a given increase in the grant date firm stock price and a concurrent increase in return volatility the increment of total value at the vesting date acts as a proxy for the incentive effects of esos if the option is attached to the existing contract without adjusting cash compensation we suggest that a firm should not always fix the strike price to the grant date stock price instead the strike price should vary with the length of the vesting period we also show that compared with at the money options restricted stock generates greater incentives to increase stock prices in some scenarios especially when equity based awards are vested early if the vesting period is long the firm could grant options instead of restricted stock to maximize incentives

optimal exercise of executive stock options and implications for firm cost this paper conducts a comprehensive study of the optimal exercise policy for an executive stock option and its implications for option cost average life and alternative valuation concepts the paper is the first to provide analytical results for an executive with general concave utility wealthier or less risk averse executives exercise later and create greater option cost however option cost can decline with volatility we show when there exists a single exercise boundary yet demonstrate the possibility of a split continuation region we also show that for constant relative risk averse utility the option value does not converge to the black and scholes value as the correlation between the stock and the market portfolio converges to one we compare our model s option cost with the modified black and scholes approximation typically used in practice and show that the approximation error can be large or small positive or negative depending on firm characteristics

the effect of the set of comparable firms on the accuracy of the price earnings valuation method the price earnings pie valuation method estimates a firm s stock price as the product of its earnings and the pie multiple determined from a set of comparable firms this paper studies empirically the accuracy of the pie valuation method when comparable firms are selected on the basis of industry risk and earnings growth the effect of adjusting earnings for cross sectional differences in leverage is also examined

permanent versus transitory components of annual earnings and estimation error in earnings response coefficients abstract previous research has generally estimated unexpected earnings as the change relative to the previous year assuming that shocks to annual earnings are purely permanent in the presence of transitory components of annual earnings we predict that using earnings changes as a proxy for unexpected earnings causes earnings response coefficients to be understated and the estimation error to be negatively cross sectionally correlated with persistence the negative correlation causes the association between earnings response coefficients and persistence to be overstated we use the ima 1 1 model to capture transitory components of annual earnings and obtain results that are consistent with our predictions

risk ambiguity and the exercise of employee stock options abstract we investigate the importance of ambiguity or knightian uncertainty in executives stock option exercise decisions we develop an empirical estimate of ambiguity and include it in regression models alongside the traditional measure of risk equity volatility we show that each variable has a significant effect on the timing of option exercises with volatility causing executives to hold options longer to preserve option value and ambiguity increasing the tendency for executives to exercise early

valuing executive stock options with endogenous departure abstract executive stock options differ from exchange traded options because of vesting and portability restrictions executive departure from the firm forces early exercise reducing the value of executive options current methodology calculates the option value by multiplying the black scholes option price by the departure probability this ignores the possibility that executive departure is less likely when stock price is high and thus is correlated with the stock price we show that this correlation implies a substantial increase in option values a similar situation occurs in performance based option packages where the actual number of options granted depends on stock performance

executive option exercises and financial misreporting abstract several recent papers document that the magnitude of potential gains from stock based compensation is positively related to the likelihood of misreporting in a sample of firms that announce restatements of their financial statements from 1997 to 2002 we examine whether managers realize these potential gains occurring from their accounting choices after controlling for diversification needs and stock price impact we find no significant evidence of higher option exercises by executives in the misreported years however for firms that are more likely to have made deliberate aggressive accounting choices we find significant evidence of higher option exercises for these firms option exercises are higher by 20 60 in comparison to industry and size matched nonrestating firms options exercises by executives are also increasing in the magnitude of the restatement as captured by the effect of the restatement on net income these higher option exercises tend to be more pervasive and are not just confined to the ceo and cfo of the firm

accounting earnings and future economic rents an empirical analysis abstract this study reexamines competition cost structure and growth opportunities effects on earnings response coefficients and extends this literature in several ways first it presents a more refined theoretical motivation for investigating competition and cost structure effects second it introduces new economic factor proxies that confirm prior findings with respect to competition but differ from prior findings with respect to cost structure and growth opportunities overall the evidence suggests that accounting earnings reflect information about future economic rents generated by firms assets in place the evidence also suggests contrary to prior studies that accounting earnings are not very informative about firms growth opportunities

job matching and the wage distribution this paper brings together the microeconomic labor and the macroeconomic equilibrium views of matching in labor markets we nest a job matching model a la jovanovic 1984 into a mortensen and pissarides 1994 type equilibrium search environment the resulting framework preserves the implications of job matching theory for worker turnover and wage dynamics and it also allows for aggregation and general equilibrium analysis we obtain two new equilibrium implications of job matching and search frictions for wage inequality first learning about match quality and worker turnover map gaussian output noise into an ergodic wage distribution of empirically accurate shape unimodal skewed with a paretian right tail second high idiosyncratic productivity risk hinders learning and sorting and reduces wage inequality the equilibrium solutions for the wage distribution and for the aggregate worker flows quits to unemployment and to other jobs displacements hires provide the likelihood function of the model in closed form

real investment implications of employee stock option exercises this paper examines a real cost of awarding employee stock options based on the observation that managers are extremely concerned about earnings per share dilution in equity related compensation we predict and find that firms experiencing significant employee stock option eso exercises shift resources away from real investments towards the repurchase of their own stocks we further find weak evidence of a decline in subsequent firm performance as measured by return on assets for several years following the cut in discretionary investments as a result of stock option exercises though this result is sensitive to the metric used to measure performance collectively our findings indicate that eso exercises potentially impose a real cost on the firm in terms of foregone investment opportunities

non marketability and the value of employee stock options abstract we adapt the benninga et al 2005 framework to value employee stock options esos the model quantifies non diversification effects is computationally simple and provides an endogenous explanation of eso early exercise using a proprietary dataset of eso exercise events we measure the non marketability eso discount we find that the eso value on the grant date is approximately 45 of a similar plain vanilla black scholes value the model is aligned with empirical findings of esos gives an exercise boundary of esos and can serve as an approximation to the fair value estimation of share based employee and executive compensation using the model we give a numerical measure of non diversification in an imperfect market

a measure of competition based on 10 k filings in this paper we develop a measure of competition based on management s disclosures in their 10 k filing and find that firms rates of diminishing marginal returns on new and existing investment vary significantly with our measure we show that these firm level disclosures are related to existing industry level measures of disclosure e g herfindahl index but capture something distinctly new in particular we show that the measure has both across industry variation and within industry variation and each is related to the firm s future rates of diminishing marginal returns as such our measure is a useful complement to existing measures of competition we present a battery of specification tests designed to explore the boundaries of our measure and how it varies with the definition of industry and the presence of other measures of competition

forecasting volatility using long memory and comovements an application to option valuation under sfas 123r horizon matched historical volatility is commonly used to forecast future volatility for op tion valuation under the statement of financial accounting standards sfas 123r in this paper we empirically investigate the performance of using historical volatility to forecast long term stock return volatility in comparison with a number of alternative forecasting methods in analyzing forecasting errors and their impact on reported income due to option expensing we find that historical volatility is a poor forecast for long term volatility and that shrinkage adjustment toward comparable firm volatility only slightly improves its per formance forecasting performance can be improved substantially by incorporating both long memory and comovements with common market factors we also experiment with a simple mixed horizon realized volatility model and find its long term forecasting perfor mance to be more accurate than historical forecasts but less accurate than long memory forecasts

market valuation of employee stock options this study investigates whether investors incorporate the value of a firm s outstanding employee stock options into its stock price i estimate the outstanding options value for a sample of firms for which outstanding fixed options exceed 5 of outstanding common shares in 1988 i find a negative correlation between the value of outstanding options and a firm s share price the correlation is stronger i for the option s intrinsic value than for the option s time value ii for options that are later in their vesting stage than earlier in their vesting stage and iii for large firms than for small firms in addition the fasb s method for calculating compensation expense has no explanatory power in the presence of this paper s calculation of the options value

managerial responses to incentives control of firm risk derivative pricing implications and outside wealth management a b s t r a c t we model a firm s value process controlled by a manager maximizing expected utility from restricted shares and employee stock options the manager also controls allocation of his outside wealth which allows partially hedging of his exposure to firm risk managerial control increases the expected time to exercise for his employee stock options it also reduces the gap between his certainty equivalent and the firm s fair value for his compensation but that gap remains substantial managerial control also causes traded options to exhibit an implied volatility smile with costly control the same basic patterns remain but the manager s risk taking is dampened

an efficient ascending bid auction for multiple objects when bidders exhibit multi unit demands standard auction methods generally yield inefficient outcomes this article proposes a new ascending bid auction for homogeneous goods such as treasury bills or telecommunications spectrum the auctioneer announces a price and bidders respond with quantities items are awarded at the current price whenever they are clinched and the price is incremented until the market clears with private values this dynamic auction yields the same outcome as the sealed bid vickrey auction but has advantages of simplicity and privacy preservation with interdependent values this auction may retain efficiency whereas the vickrey auction suffers from a generalized winner s curse

executive stock options as mixed gambles revisiting the behavioral agency model conceiving of stock options as providing ceos with cues for the possibility of both greater prospective wealth and losses to current wealth we revisit predictions of the behavioral effects of equity based pay using the behavioral agency model bam we refine the bam s original formulation and provide an explanation for previous conflicting empirical results by theorizing that the anticipation of prospective wealth attenuates the negative effect of accumulated current equity wealth upon ceo strategic risk taking in doing so we offer an advancement of the dialectic between 1 classical agency scholars arguing that equity based pay leads to more risk taking and 2 behavioral scholars arguing that equity wealth creates risk bearing leading to less risk taking we also suggest that the influences of prospective wealth and current wealth on strategic risk taking depend on the extent to which agents can manage the risk inherent in their compensation package and agent vulnerability to losses formal hypotheses to test these expectations are made by focusing on equity based compensation our findings offer strong support for these theoretical expectations

the exercise and valuation of executive stock options abstract in theory hedging restrictions faced by managers make executive stock options more difficult to value than ordinary options because they imply that exercise policies of managers depend on their preferences and endowments using data on option exercises from 40 firms this paper shows that a simple extension of the ordinary american option model which introduces random exogenous exercise and forfeiture predicts actual exercise times and payoffs just as well as an elaborate utility maximizing model that explicitly accounts for the nontransferability of options the simpler model could therefore be more useful than the preference based model for valuing executive options in practice

an ascending vickrey auction for selling bases of a matroid consider selling bundles of indivisible goods to buyers with concave utilities that are additively separable in money and goods we propose an ascending auction for the case when the seller is constrained to sell bundles whose elements form a basis of a matroid it extends easily to polymatroids applications include scheduling allocation of homogeneous goods and spatially distributed markets among others our ascending auction induces buyers to bid truthfully and returns the economically efficient basis unlike other ascending auctions for this environment ours runs in pseudopolynomial or polynomial time furthermore we prove the impossibility of an ascending auction for nonmatroidal independence set systems

unemployment responses to skill biased technology shocks the role of labour market policy do skill biased shocks that increase the spread of labour productivities interacting with different policy regimes explain the rise in unemployment in europe relative to the united states in the 1980s and 1990s the hypothesis is an implication of a version of the mortensen and pissarides 1994 model of equilibrium unemployment which allows for worker heterogeneity a calibrated version of the model implies that a similar unemployment increase would have occurred in the united states over this period given changes in relative productivity by education implied by observed wage changes had unemployment compensation and employment protection policies been at european levels

identifying control motives in managerial ownership evidence from antitakeover legislation this study uses the introduction of second generation antitakeover legislation as a natural experimental setting to infer the value that managers place on the control rights conferred by stock ownership we conjecture that managers will reduce their stockholdings in the post legislation period because they can ensure their prior level of control while holding fewer risky shares using a variety of specifications we find robust evidence consistent with this revealed preference hypothesis further demonstrating the key role played by control considerations in managers stockholding decisions the reductions in ownership are concentrated in management teams with higher levels of initial ownership and in firms without poison pills

a matching model with endogenous skill requirements we consider a labor market in which workers differ in their abilities and jobs differ in their skill requirements the distribution of worker abilities is exogenous but we model the choice of skill requirements by firms high skill jobs produce more output than low skill jobs but high skill jobs require high skill workers and thus are more difficult to fill we use a matching model together with a nash bargaining approach to wage setting to determine the equilibrium mix of job types along with the equilibrium relationship between worker and job characteristics wages and unemployment

does stock return predictability affect eso fair value abstract executive stock options esos are modified american options that cannot be valued using standard methods with a few exceptions the literature has discussed the eso fair value by assuming unpredictable stock returns which are not supported by the available empirical evidence in this paper we obtain the fair value of american esos when stock returns are predictable and specifically driven by the trending ornstein uhlenbeck process of lo and wang 1995 we solve the executive s portfolio allocation problem for a simple buy and hold strategy when his wealth can be distributed between a risk free asset and a market portfolio this problem is jointly solved with the executive s optimal exercise policy we find that executives tend to wait longer the higher the predictability independently of the composition of executive s asset menu we have also analyzed the implications under the fas123r proposals for the eso fair value and found that even for low autocorrelations there is a meaningful mispricing when unpredictable returns are erroneously assumed

multi unit auctions with budget limits abstract we study multi unit auctions for bidders that have a budget constraint a situation very common in practice that has received relatively little attention in the auction theory literature our main result is an impossibility there is no deterministic auction that 1 is individually rational and dominant strategy incentive compatible 2 makes no positive transfers and 3 always produces a pareto optimal outcome in contrast we show that ausubel s clinching auction satisfies all these properties when the budgets are public knowledge moreover we prove that the clinching auction is the unique auction that satisfies all these properties when there are two players this uniqueness result is the cornerstone of the impossibility result few additional related results are given including some results on the revenue of the clinching auction and on the case where the items are divisible

why do firms use incentives that have no incentive effects this paper illustrates why firms might choose to implement stock option plans or other pay instruments that reward luck i consider a model where adjusting compensation contracts is costly and where employees outside opportunities are correlated with their firms performance the model may help to explain the use and recent rise of broad based stock option plans as well as other financial instruments even when these pay plans have no effect on employees on the job behavior the model suggests that agency theory s often overlooked participation constraint may be an important determinant of some common compensation schemes particularly for employees below the highest executive ranks many compensation plans reward or punish employees for factors they cannot control an often discussed example of this phenomenon is executive compensation where stock options are not generally indexed to the overall market however many firms also offer firm wide stock options and profit sharing plans that provide even weaker incentives than executive plans after all most workers can expect to reap trivial personal gain from their contribution to firm value or profits i consider an explanation for this phenomenon in which firms contract with employees as a means of indexing wages to market rates rather than to provide incentives while much of the agency literature has concentrated on inducing optimal effort i consider the importance of the generally overlooked participation constraint i study a model in which employees outside opportunities are correlated with firm profits or stock price and in which both turnover and adjusting the pay scheme parameters are costly given these assumptions the firm may find it most profitable to pay the employee in a way that is correlated with the outside options presented by the outside labor market despite the requisite risk premium rather than pay a fixed wage that insures participation in all states the model derived below starts from the assumption that wage adjustments are costly but that workers are willing to make part of their pay contingent

the ability of earnings to predict future earnings and cash flow this paper examines the value relevance of earnings by testing their ability to predict two future benefits of equity investment earnings and cash flow from operations previous research discussed below has given an incomplete view of earnings predictive ability as it has typically focused on short horizons while ignoring the longer term benefits that are also valued as in ohlson 1990 i test earnings ability to predict future earnings and future cash flow from operations1 one through eight years ahead using annual data from

structural models and endogeneity in corporate finance the link between managerial ownership and corporate performance this paper presents a parsimonious structural model that isolates primary economic determinants of the level and dispersion of managerial ownership firm scale and performance and the empirical associations among them in particular variation across firms and through time of estimated productivity parameters for physical assets and managerial input and corresponding variation in optimal compensation contract and firm size combine to deliver the well known hump shaped relation between tobin s q and managerial ownership to assess the effectiveness of standard econometric approaches to the endogeneity problem we apply those remedies to panel data generated from the model the unfortunate conclusion is that at least in the ownership performance context proxy variables fixed effects and instrumental variables do not generally provide reliable solutions to simultaneity bias

pricing executive stock options under employment shocks abstract we obtain explicit expressions for the subjective objective and market value of perpetual executive stock options esos under exogenous employment shocks driven by an independent poisson process previously we obtain the executive s optimal exercise policy from the subjective valuation that is necessary for the objective one or fair value the perpetual eso is compared with the true finite maturity eso finding that the approximation is reasonably good to illustrate the usefulness of the objective valuation for accounting purposes we analyze the statistical distribution of the fair value when there is uncertainty about the employment shock intensity finally the role of esos in the design of executives incentives is also discussed

some economic determinants of time series properties of earnings abstract the earnings time series literature in accounting focuses on the statistical characteristics of the processes which generate corporate earnings in order to further our understanding of earnings behavior this study investigates the question whether inter firm differences in these statistical characteristics autocorrelations and variances of earnings changes can be explained by economic factors various relationships between economic factors and earnings behavior are derived from the economic literature and examined empirically in this study findings indicate that autocorrelations and variability of annual earnings and earnings over equity changes are systematically associated with the following factors the type of product the height of industry barriers to entry a surrogate for degree of competition the degree of capital intensity operating leverage and the firm size

moving closer to the action examining compensation design effects on firm risk we examine the influence of ceo equity based compensation on strategic risk taking by the firm building off the behavioral agency model agency theory and prospect theory we develop arguments about when equity based compensation elements will increase or decrease executive risk propensity and in turn strategic risk taking incorporating a behavioral perspective into our models of incentive alignment provides us with new and potentially more accurate predictions about how individual elements of ceo pay will influence risk selection as well as how equity compensation interacts with cash compensation and with other factors to influence risk preferences in general this study provides evidence that ceo equity based compensation significantly influences strategic risk but that this influence is more nuanced and complex than conventional treatments of executive compensation assume in particular we find that different forms of equity based pay exhibit dissimilar influences on strategic risk and that their influence changes as their value and vesting status change second we find that cash based forms of pay moderate the incentive properties of equity based pay indicating that cash based pay may affect how executives perceive risks associated with equity pay finally we find that stock price volatility and board actions each also moderate the incentive effects of equity based pay in sum our results argue for increased recognition of a behavioral perspective on executive compensation and greater precision in how we measure and model the incentive alignment properties of ceo compensation

forecasting currency volatility a comparison of implied volatilities and ar fi ma models we compare forecasts of the realized volatility of the pound mark and yen exchange rates against the dollar calculated from intraday rates over horizons ranging from one day to three months our forecasts are obtained from a short memory arma model a long memory arfima model a garch model and option implied volatilities we find intraday rates provide the most accurate forecasts for the one day and one week forecast horizons while implied volatilities are at least as accurate as the historical forecasts for the one month and three month horizons the superior accuracy of the historical forecasts relative to implied volatilities comes from the use of high frequency returns and not from a long memory specification we find significant incremental information in historical forecasts beyond the implied volatility information for forecast horizons up to one week

american garch employee stock option valuation abstract we implement a flexible simulation based approach for the fair value of employee stock option eso that accounts for the vesting period departure risk and voluntary suboptimal early exercise we introduce garch effects on the underlying asset and we analyze the price bias with respect to the constant volatility case we also perform a sensitivity analysis with respect to changes in several eso characteristics we compare this valuation with fas 123 method revealing a fas overvaluation finally we value a real eso plan providing the confidence intervals for the estimated eso prices

uncertainty avoidance and the timing of employee stock option exercise we examine the impact of the cultural norm of uncertainty avoidance on employee stock option eso exercise behavior using proprietary data from a multinational firm we find that employees from countries with higher levels of uncertainty avoidance exercise their stock options earlier these findings lend support to a maintained assumption in the eso literature that employee attitudes toward uncertainty influence stock option exercise behaviors our findings further help to explain prior findings of cross cultural differences in firms compensation practices by indicating that employee responses to option based pay and firms consequent financial reporting costs vary as functions of employee uncertainty avoidance

the impact of young workers on the aggregate labor market an increase in the share of youth in the working age population of one state or region relative to the rest of the united states causes a sharp reduction in that state s relative unemployment rate and a modest increase in its labor force participation rate this is inconsistent with many theories of the labor market but can be easily explained by a model of frictional unemployment with on the job search the theory makes strong predictions regarding the behavior of wages which are shown to be consistent with the data the paper also reconciles its findings with an existing body of apparently contradictory empirical evidence

equilibrium unemployment with internal labour markets the flow approach to the labour market is based on a clear distinction between trade and production this paper argues that this separation is not realistic because many firms in developed economies usually fill an important share of their vacancies by upgrading incumbent employees the implications of the existence of internal labour markets are explored with the help of a simple model that extends the well known pissarides setup the main result is that the distribution of unemployment by education is correlated with the relative importance of internal labour markets in particular i show that more internalization is associated both with more inequality in the distribution of unemployment with the burden falling mainly on the less educated and with less inequality in the distribution of wages by education the model also generates in a simple way upward sloping wage profiles which are offered by firms with internal labour markets to their recruits who face a nonzero probability of promotion to a skilled job

employee stock option exercises an empirical analysis this paper describes the exercise behavior of over 50 000 employees who hold longterm options on employer stock at eight corporations employees typically exercise options years before expiration commonly sacrificing half of the black scholes value exercise is strongly associated with recent stock price movements the market to strike ratio proximity to vesting dates time to maturity volatility and the employee s level within the company these findings have implications for compensation planners the fasb as it develops a new accounting standard for options and financial statement users and preparers who apply and interpret the new fasb standard

non transferable non hedgeable executive stock option pricing abstract to value non transferable non hedgeable ntnh contingent claims and price executive stock options esos we use a replication argument to translate portfolios with ntnh derivatives into portfolios of primary assets only with stochastic portfolio constraints by identifying stochastic discount factors and finding subjective prices of ntnh european and american esos for block and continuous partial exercise we derive executives optimal exercise policies and use these to find objective prices costs of esos to firms through numerical simulations we obtain policy implications regarding esos incentivizing efficiency for the first time we demonstrate that unlike under block exercise subjective prices under continuous partial exercise may be higher than objective ones moreover volatility regimes and executives other wealth are important in eso pricing and are thus essential to empirical executive compensation studies

the impact of surplus schooling on earnings some additional findings this paper examines the impact of overeducation or surplus schooling on earnings overeducated workers are defined as those with educational attainments substantially above the mean for their specific occupations two models are estimated using data from the 1980 census though our models data and measure of overeducation are different from those used by rumberger 1987 our results are similar our results show that overeducated workers often earn less than their adequately educated and undereducated counterparts

the persistence of volatility and stock market fluctuations this paper examines the potential influence of changing volatility in stock market prices on the level of stock market prices it demonstrates that volatility is only weakly serially correlated implying that shocks to volatility do not persist these shocks can therefore have only a small impact on stockmarket prices since changes in volatility affect expected required rates of return for relatively short intervals these findings lead us to be skeptical of recent claims that the stock market s poor performance during the 1970 s can be explained by volatility induced increases in risk premia this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item this abstract was borrowed from another version of this item

overeducation in the labor market this article examines the reasons for the observed discrepancy between workers actual and required levels of schooling and the resulting differences in returns to schooling overeducated workers are found to be younger and to have lower amounts of on the job training than workers with the required level of schooling they also have higher rates of firm and occupational mobility characterized by movement of higher level occupations the findings suggest that overeducation can be explained by the trade off between schooling and other components of human capital and by the mobility patterns of overeducated workers

probability weighting and employee stock options this paper documents that riskier firms with higher idiosyncratic volatility grant more stock options to nonexecutive employees standard models in the literature cannot easily explain this pattern a model in which a risk neutral firm and an employee with prospect theory preferences bargain over the employee s pay package can the key feature which makes stock options attractive is probability weighting the model fits the data on option grants well when calibrated using standard parameters from the experimental literature the results are the first evidence that risky firms can profitably use stock options to cater to an employee demand for long shot bets

worker flows job flows and unemployment in a matching model abstract standard matching models of unemployment generate far too little volatility in unemployment and vacancies relative to the variation in the shock variables shimer 2005 showed that in us data the vacancy to unemployment ratio is about 26 times more volatile than the standard model predicts he identified the flexibility of wages as the key issue and triggered a heated debate on possible improvements of the core model to accommodate these empirical facts in this paper we first document shimer s facts for the uk and find them to be qualitatively similar to us facts we then develop and calibrate a model based on the mortensen and pissarides approach that increases the volatility of the v u ratio 20 fold compared to the standard framework the key features of our model relate to the job creation decision by firms and the search options of workers we allow these to search whilst employed and firms to re advertise jobs that have been quit from this leads us to use a different job creation process whereby potential vacancies or job ideas arise at a finite rate per period over a range of idiosyncratic productivities calibrating the model to uk data we show that it delivers volatility in unemployment and vacancies much closer to though still not as large as that observed for the uk whilst retaining the standard wage determination process

lower salaries and no options on the optimal structure of executive pay we estimate a standard principal agent model with constant relative risk aversion and lognormal stock prices for a sample of 598 us ceos the model is widely used in the compensation literature but it predicts that almost all of the ceos in our sample should hold no stock options instead ceos should have lower base salaries and receive additional shares in their companies for a typical value of relative risk aversion almost half of the ceos in our sample would be required to purchase additional stock in their companies from their private savings the model predicts contracts that would reduce average compensation costs by 20 while providing the same incentives and the same utility to ceos we investigate a number of extensions and modi cations of the standard model but nd none of them to be satisfactory we conclude that the standard principal agent model typically used in the literature cannot rationalize observed contracts one reason may be that executive pay contracts are suboptimal

on the job search in a matching model with heterogeneous jobs and workers this paper considers a matching model with heterogenous jobs unskilled and skilled and workers low and high educated which allows for on the job search by mismatched workers the latter are high educated workers who transitorily accept unskilled jobs and continue to search for skilled jobs our findings show that on the job search introduces an additional source of between and within group wage inequality furthermore the higher quit rate of mismatched workers exerts a negative externality on unskilled jobs and weakens the labour market position of low educated workers this last feature changes the effects of skill biased technological change and it alters the response of the labour market to shifts in the skill distribution this paper has been written for presentation as an invited lecture at the annual conference of the european association of labour economics eale 2003 seville 18 21 september 2003 we are very grateful to maite blazquez for excellent research assistance we also wish to thank barbara petrongolo participants in seminars at uc3m core essex and lse for helpful comments and especially j albrecht for his insightful discussion on a preliminary draft of this paper the usual disclaimer applies

a reexamination of the persistence of accruals and cash flows we reexamine prior studies conclusion that accruals are less persistent than cash focusing on two aspects of persistence that are crucial to determining its properties the first time specificity refers to the fact that persistence describes how current period shocks to income translate into next period income traditional measures of accruals are however functions of current and non current period transactions we show that the inclusion of non current period transactions leads to a downward upward bias on the persistence of accruals cash flows we develop alternative measures of accruals and cash flows that are not misaligned and show that the differential persistence of cash flows over accruals is more than 70 smaller using these measures the second aspect of persistence is firm specificity specifically we evaluate persistence using firm specific estimations and find that more than 85 of firms show no evidence that accruals are less persistent than cash flows

risk aversion and block exercise of executive stock options abstract it is well documented that executives granted stock options tend to exercise early and in a few large transactions or blocks standard risk neutral valuation models cannot explain these patterns and attempts to capture the exercise behavior of risk averse executives have been limited to the special case of one option this paper solves for the optimal exercise behavior for a risk averse executive who is granted multiple stock options we show that utility based models do not predict block exercise behavior rather the risk averse executive exercises stock options individually at a sequence of increasing price thresholds when in addition the executive faces frictions such as costly exercise he faces a trade off between exercising little and often to maximize return and exercising larger quantities on fewer occasions to minimize effort this generates realistic block exercise behavior and yields new predictions in particular executives should begin by exercising large blocks of options but the block sizes should become smaller over time our framework also allows us to study the impact of multiple exercise dates on estimates of the cost of options to the company we find that assuming the executive can only exercise on a single occasion underestimates the cost of the options compared with allowing for optimal exercise behavior

discussion of information distribution within firms evidence from stock option exercises abstract huddart and lang j accounting econom 34 2003 documents that higher level of employee option exercise during a particular month is associated with lower returns in subsequent months suggesting employees exploit private information in their exercise decisions while the paper extends the insider trading literature that has focused on top executives a number of inconsistencies with prior studies remain unresolved moreover the study does not establish a direct link to the private information employees supposedly exploit establishing such a link is warranted here in the light of the surprising finding that exercises by senior employees are no more informative than those by lower rank employees

on the persistence and pricing of industry wide and firm specific earnings cash flows and accruals economic theory suggests that the industry wide component of firm performance is more persistent than the firm specific component this paper tests whether investors fail to fully appreciate the relatively higher lower persistence of industry wide firm specific earnings consistent with predictions we find that the industry wide component of earnings is a significant predictor of future stock returns we show that this form of mispricing is distinct from the accrual anomaly sloan 1996 a hedge portfolio trading strategy that exploits signals from both industry fundamentals and accounting accruals generates abnormal returns in excess of either strategy alone additional evidence suggests that the market underreacts overreacts to industry wide cash flows firm specific accruals but correctly prices both industry wide accruals and firm specific cash flows

youth labour markets in spain education training and crowding out abstract the stylised facts describing the poor performance of the youth labour market in spain over the last two decades entailing high unemployment rates for both higher and lower educated workers over education and low intensity of on the job training are explained through a simple matching model where higher educated workers crowd out lower educated ones from their traditional entry jobs in this model a combination of rigid labour market institutions and an increase in the relative supply of higher educated workers harms the training prospects of lower educated workers

worker turnover at the firm level and crowding out of lower educated workers this paper investigates whether employers exploit cyclical downturns to improve the average skill level of their work force we use a unique dataset that contains information on workers jobs as well as firm characteristics our findings are that at each job level mainly lower educated workers leave during downturns furthermore at each level of job complexity workers with a higher education are not more productive than lower educated workers we find no evidence that higher educated workers crowd out lower educated workers during recessions

wage differentials employer size and unemployment the unique equilibrium solution to a game in which a continuum of individual employers choose permanent wage offers and a continuum of workers search by sequentially sampling from the set of offers is characterized wage dispersion is a robust outcome provided that workers search while employed as well as when unemployed the unique nondegenerate equilibrium distribution of wage offers is constructed for three cases 1 identical workers and employers 2 identical employers and an atomless distribution of worker supply prices and 3 identical workers and an atomless distribution of job productivities copyright 1998 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

do stock options overcome managerial risk aversion evidence from exercises of executive stock options we report that the probability that executives exercise options early decreases with the volatility of the underlying stock return we interpret this to mean that executives subjective option value increases with volatility and that option grants increase executives risk appetite further decomposition reveals that the results are most pronounced for idiosyncratic volatility consistent with our conjecture that executives believe they can better predict or influence the resolution of idiosyncratic uncertainty than systematic uncertainty and thus favor the former data are available at http dx doi org 10 1287 mnsc 2016 2495 this paper was accepted by wei jiang finance

a bayesian approach to modeling stock return volatility for option valuation new measures of stock return volatility are developed to increase the precision of stock option price estimates with bayesian statistical methods volatility estimates for a given stock are developed using prior information on the cross sectional patterns in return volatil ities for groups of stocks sorted on size financial leverage and trading volume call option values computed with the bayesian procedure generally improve prediction accuracy for market prices of call options relative to those computed using implied volatility standard historical volatility or even the actual ex post volatility that occurred during each option s life although the bayesian methods produce biased call price estimators they do reduce the systematic tendency of standard pricing approaches to overprice underprice options on high low volatility stocks little bias improvement is observed with respect to the time to maturity and moneyness of the call options