cost reduction competition and industry performance in many markets firms compete over time by expending resources with the purpose of reducing their costs sometimes the cost reducing investments operate directly on costs in many instances they take the form of developing new products that deliver what customers need more cheaply therefore product development can have the same ultimate effect as direct cost reduction in fact if one thinks of the product as the services it delivers to the customer in the way that lancaster pioneered then product development often is just cost reduction

financial intermediary coalitions abstract in this article an environment in which the investment opportunities of agents are private information is studied and it is shown that financial intermediaries arise endogenously within that environment it is established that financial intermediaries are part of an efficient arrangement in the sense that they are needed to support the authors private information core allocations these intermediaries which are coalitions of agents exhibit the following characteristics in equilibrium they borrow from and lend to large groups of agents they produce information about investment projects and they issue claims that have different state contingent payoffs than claims issued by ultimate borrowers

accounting for changes in the labor supply of recently divorced women how much of the rise in women s labor supply associated with divorce can be attributed to observable changes in the wife s environment such changes include a reduction in nonwage family income a rise in her after tax wage rate changes in the number of children present and a reduction in husband s hours at home we use panel data to address this question when we do not account for individual effects we find that changes in observables are important but a residual effect dependent solely on marital status remains in estimates that do control for individual heterogeneity observable changes in the wife s environment account for even less of the total shift in labor supply

labour supply estimation and public policy abstract economists devote considerable energies towards refining their econometric techniques to overcome difficulties connected with conducting empirical research despite advances in technique it is not clear whether further refinement in this direction is worthwhile for policy purposes it may be that no further amount of statistical adjustment of inadequate data will increase understanding and that better data is simply necessary to add to our knowledge but rarely is sufficient credit paid to new forms of data in short econometric technique is emphasized to the neglect of data innovation as if new data were merely lying about waiting for an ingenious suggestion for use this paper surveys advances of the last twenty five years in estimating labour supply for policy purposes with a view towards appreciating the relative contribution of both improvements in econometric technique as well as developments of new data after briefly detailing the key parameters which economists have sought to estimate we describe the early first generation research circa 1970 which is plagued by problems of unobservable variables measurement errors truncation and selectivity bias and non linear budget constraints second generation research constitute attempts to resolve one or more of these difficulties and the respective contribution of econometric technique and new data is acknowledged and assessed including the contribution of data generated by large scale social experiments in which participants are randomly assigned to different guaranteed income plans and their labour supply behaviour measured

monopolistic competition in the spirit of chamberlin a general model this paper develops a model of large group chamberlinian monopolistic competition in which 1 there are many firms producing differentiated commodities 2 each firm is negligible in that it can ignore its impact on and hence reactions from other firms 3 free entry leads to zero profit of operating firms but 4 each firm faces a downward sloping demand curve the existence of a monopolistically competitive equilibrium is established in a companion paper more particular questions such as whether the market provides too many or too few products are addressed for a special case of the model

second best subsidies in monopolistic competition abstract in the spence dixit stiglitz model of monopolistic competition an output or input subsidy is welfare improving under competitive conjecture the significance of this result is that it holds even when the subsidy exacerbates the potential problem of excess product diversity

new evidence on labor supply employment versus hours elasticities by sex and marital status using the tri annual micro panel data of the survey of income and program participation we estimate fixed effects labor supply models separating the extensive and intensive margins the employment elasticity is 0 6 for single men versus 1 1 for married men the employment elasticity is 2 4 for single women versus 1 8 for married women the compensated hours worked elasticity is 0 4 for employed single and married men and 0 7 for employed single and married women the implied aggregate employment elasticity of 1 5 and hours per employee elasticity of 0 5 indicate employment fluctuations account for three fourths of wage induced variation in labor hours

married womens tastes and the decision to participate in the labour market results from a fixed effects model in the paper we report estimates from two logit models of women s labour force participation a model with out fixed effects estimated from cross sectional data indicates a significant postive relation between work experience and particiption we ask whether the relation is due to a causal influence extered by the former variable on the latter or to a common underlying variable taste for market attachement to answer this question we present results from a fixed effects model estimated from panel data in this model the estimated coefficients of experience are insignificant suggestion that a taste for market attachement underlies both experience and participation is the presence of preschool children

an empirical model of labor supply in a life cycle setting this paper formulates and estimates a structural intertemporal model of labor supply using theoretical characterizations derived from an economic model of lifetime behavior a two step empirical analysis yields estimates of intertemporal and uncompensated substitution effects which provide the information needed to predict the response of hours of work to life cycle wage growth and shifts in the lifetime wage path

no fault divorce laws and the labor supply of women with and without children we use a difference in difference in difference estimator to compare changes in labor force participation weeks and hours of work associated with no fault divorce laws allowing for differential responses for married women with and without children although other research has found that the labor supply of women in general does not respond to no fault divorce laws we find that no fault divorce laws are associated with increases in the labor supply of married mothers relative to married nonmothers even after controlling for changes in female labor supply in states without no fault divorce laws and for property division rules associated with the laws

labor supply hours constraints and job mobility if hours can be freely varied within jobs the effect on hours of changes in preferences for those who do change jobs should be similar to the effect on hours for those who do not change jobs conversely if employers restrict hours choices then changes in preferences should affect hours more strongly when the job changes than when it does not change for a sample of married women we find that changes in many of the labor supply preference variables produce much larger effects on hours when the job changes

human capital uncertain wage distributions and occupational and educational choices this study develops a model of occupational and educational choices individuals are assumed to choose careers based on expected utility maximi zation given uncertainty concerning future earnings the model directly leads to estimable equations relating career choices to the moments of occupational earnings distributions we report maximum likelihood estimates using a sample of high school graduates from maryland school districts 1951 1969 the eight observed career choices respond as expected to the first and second moments of the earnings distribution and to a measure of school quality reasonable estimates of human capital production and supply elasticities are obtained for the career choices

monetary policy and bank lending in the euro area is there a stock market channel or an interest rate channel abstract in this paper i compare a traditional demand oriented model of bank lending with its focus on short term interest rates in the money market to a non traditional capital budgeting model of bank lending based on movements in share valuations for the euro area using non nested hypothesis tests omitted variables tests and granger causality tests i reject the traditional demand oriented model of bank lending and fail to reject the capital budgeting model of bank lending for monetary financial institutions mfi s in the euro area even though europe is a bank based financial system it appears the stock market plays a key role in the lending decisions and allocation of resources in europe one possible policy implication of this research is that the central bank should try and stabilize stock prices in order to achieve their goal of stabilizing bank lending and the economy

data watch the panel study of income dynamics by collecting annual economic and demographic information from a large and representative sample of u s households for over a quarter century the panel study of income dynamics has compiled a remarkably useful set of microdata this article describes the psid and how its unique longitudinal and in some cases intergenerational features have been used for studies of intertemporal models of labor supply wages employment and job tenure consumption poverty dynamics extended family behavior and the intergenerational transmission of economic status

life cycle employment and fertility across institutional environments in this paper we formulate a dynamic utility maximization model of female labor force participation and fertility choices and estimate approximate decision rules using data on married women in italy spain and france the pattern of estimated state dependence effects across countries is consistent with aggregate patterns in part time employment and child care availability suggesting that labor market rigidities and lack of child care options are important sources of state dependence simulations of the model reveal that italian and spanish women would substantially increase their participation rates were they to face the french institutional environment

what s different about banks abstract negotiable certificates of deposit cd s trade in the capital market in competition with other securities like commercial paper and bankers acceptances if cd s must pay lenders competitive monetary interest the reserve tax on cd s is borne by bank borrowers viability of the tax means there must be something special about bank loans that makes some borrowers willing to pay higher interest rates than those on other securities of equivalent risk moreover there must be something special about banks that prevents other intermediaries from competing to assure that it never pays to finance loans with cd s

information reliability and a theory of financial intermediation this paper is an analysis of when it will be beneficial for agents engaged in the production of information to form coalitions the model is cast in a financial market framework thus leading to an identification of conditions sufficient for the existence of financial intermediaries intermediation is shown to improve welfare if informational asymmetries are present and the information generated to rectify these asymmetries is potentially unreliable the usual appeal to transactions costs to explain intermediation is not needed

share issue privatizations as financial means to political and economic ends abstract this study examines how political and economic factors affect the offer price share allocation and other terms governments choose when they privatize state owned enterprises via a public share offering using a 59 country sample of 630 share issue privatizations sips with total proceeds of over 446 billion during the period 1977 1997 we find that governments consistently underprice sip offers tilt their share allocation patterns to favour domestic investors impose control restrictions on privatized firms and typically use fixed price offers rather than book building or competitive tender offers all to further political and economic policy objectives

the effect of health insurance on married female labor supply we investigate the effects of employer provided health insurance on the labor supply of married women because health benefits commonly are restricted to full time workers wives who prefer to work short hours but have no alternate source of insurance may work long hours in order to acquire coverage for their families we use data from the april 1993 current population survey benefits supplement and we exploit variation in coverage under husbands health plans to estimate the magnitude of this effect our reduced form labor supply models indicate a strong negative effect of husbands health insurance on wives work hours particularly in families with children this effect persists when we replace husbands insurance coverage with husbands offered insurance and when we use a multinomial logit model that accounts for unobserved heterogeneity in family labor supply preferences

state dependence serial correlation and heterogeneity in intertemporal labor force participation of married women a dynamic search framework is developed to analyze the intertemporal labor force participation behavior of married women using longitudinal data to allow for a rich dynamic structure the sensitivity to alternative distributional assumptions is evaluated using linear probability and probit models the dynamic probit models are estimated using maximum simulated likelihood msl estimation to overcome the computational difficulties inherent in maximum likelihood estimation of models with nontrivial error structures the results find that participation decisions are characterized by significant state dependence unobserved heterogeneity and negative serial correlation in the error component the hypothesis that fertility decisions are exogenous to women s participation decisions is rejected when dynamics are ignored however there is no evidence against this hypothesis in dynamic model specifications women s participation response is stronger to permanent than current nonlabor income reflecting unobserved taste factors

signaling and the valuation of unseasoned new issues a comment in the march 1982 issue of this journal david downes and robert heinkel 1 present an empirical examination of the role of signaling in the valuation of initial public offerings of common stock for a large sample of unseasoned new issues they examine the leland pyle 2 signaling hypothesis that firm value should be positively related to the fraction of equity retained by the original shareholders downes and heinkel conclude that the data are consistent with the leland pyle signaling hypothesis in this comment i present a more complete test of the leland pyle signaling model i also present two alternative explanations for the positive empirical relation between firm value and insider holdings which i label the agency hypothesis and the wealth effect hypothesis i find that the testable implications of the agency hypothesis are supported while the evidence is ambiguous with respect to the testable implications of the wealth effect and signaling hypotheses

credit constraints and the labour supply of immigrant families in canada the hours of work decisions in immigrant and nonimmigrant families are compared using an intertemporal labor supply model estimated over data from the 1981 and 1991 census of canada surveys the family investment hypothesis is evaluated the hypothesis states that the immigrant family is unable to borrow in the first years after migration and that the immigrant wife responds by working longer hours so as to support family consumption and her husband s labor market adjustment the empirical evidence in general supports the hypothesis since credit constraints are found to significantly distort the labor supply decisions of recently arrived immigrant families

equilibrium and optimality in a mean variance model this article reexamines an old debate over the optimality of market allocations in a symmetric mean variance world with production nonconvexities imperfectly correlated outputs and free entry we show that walrasian equilibrium does not exist that non walrasian equilibrium under price taking behavior allocates resources optimally between the risky and risk free sectors but spreads resources in the risky sector over an insufficient number of activities and that non walrasian equilibrium under consistent conjectures allocates insufficient resources to the risky sector and spreads them over an excessive number of activities these results have analogues in the theory of product differentiation

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

part time participation over the life cycle among married women who work in the market reported here are the estimates from two logit models of married women s labour force employment a pooled unconditional logit that does not control for fixed effects and a conditional logit model incorporating fixed effects both sets of results indicate the presence of occupational segregation between part time and full time employment since the amount of part time experience a woman has obtained increases the probability of part time employment these results are in agreement with those reported in previous studies that the presence of preschool children differentially encourages part time employment

rational conjectures in the theory of oligopoly abstract the paper employs the notion of rational conjectural equilibrium to remove the arbitrary nature of conjectures about rivals reactions which characterises the traditional non cooperative theory of oligopoly a general definition of these equilibria is given and the concept is then applied to a simple duopoly model the standard models of perfect competition monopoly limit price dominant firms are shown to emerge as special cases of rational conjectural equilibria

consistent conjectures in monopolistic competition abstract models of monopolistic competition such as dixit and stiglitz and spence typically assume firms take market variables as parametric this conjectural variation corresponds to chamberlin s large group approximation although these models need not have a large number of firms the present note following perry shows that consistent conjectures about the size and number of rivals can provide a more satisfactory basis for this assumption

the life cycle labor supply of married women and its implications for household income inequality i introduction there has been an abundance of papers on female labor supply over the years but most do not rigorously test the life cycle model of labor supply and none focus on the potentially important role of nonlabor income in shaping labor supply 1 their primary focus is on the wage elasticity and most recently on the intertemporal wage elasticity the intertemporal wage elasticity or the change in labor supply as wages change over the woman s life cycle is economically cleaner to interpret because it contains only a substitution effect the income effect is constant over the life cycle but this advantage comes at a cost we learn nothing about why labor supply varies across women such variability is extremely important for policy purposes because for example it has implications for income inequality the popular press often creates the impression that income inequality is worsening as upper income men marry upper income women the implication is that the rising labor force participation rate of women is increasing family income inequality on the other hand it is possible that the income of wealthy husbands exerts a negative income effect on their wives labor supply so income inequality is little changed or declines as participation rates of wives rise the objectives of this paper are twofold to estimate a life cycle labor supply model with panel data that emphasizes the husband s income effect on the wife s hours of work and to draw implications for family income inequality i provide new estimates of the income elasticity that nest the life cycle hypothesis of labor supply with the current income hypothesis the life cycle model suggests that it is the permanent income of the husband that matters not his current income yet nearly all models of female labor supply include only current income the exception is jakubson 1988 i include both and add a varying parameters specification for changes in tastes the implications for income inequality arise as an application of the life cycle labor supply model a summary of the empirical results is contained in the conclusion this paper is unusual in that it covers two relatively disparate topics though their linkage is important and demands their integration in one paper ii specification of the labor supply model following the standard life cycle labor supply model assume that an individual maximizes lifetime utility v where utility is separable over time and separable between consumption and leisure 2 mathematical expression omitted where c and l are consumption and hours of leisure for individual i rho is the rate of time preference gamma sub it reflects consumers tastes for home production leisure etc and omega is less than 1 is fixed across individuals the lifetime budget constraint is mathematical expression omitted for interest rate r wage rate w sub it hours of work h sub it and the present value of nonlabor income a sub i for an interior solution the leisure equation is 2 ln l sub it 1 omega 1 ln lambda sub i ln gamma sub it ln omega ln 1 r sup t 1 rho sup t ln w sub it where lambda sub i is the marginal utility of lifetime wealth the marginal utility of wealth lambda sub i is a fixed effect that captures all the permanent income effects that influence labor supply including expected lifetime potential wages and lifetime nonlabor income for the labor supply of a married woman the largest wealth effect is likely to be her husband s income as it enters through lambda an increase in the husband s lifetime earnings will decrease the marginal utility of lifetime wealth and decrease the wife s labor supply 3 incorporating this relationship in the parameterization of lambda mathematical expression omitted where mathematical expression omitted is the husband s lifetime income education e

the sensitivity of an empirical model of married women s hours of work to economic and statistical assumptions this study undertakes a systematic analysis of several theoretic and statistical assumption s used in many empirical models of female labor supply using a singl e data set psid 1975 labor supply data the author is able to replic ate most of the range of estimated income and substitution effects fo und in previous studies in this field he undertakes extensive specif ication tests and finds that most of this range should be rejected du e to statistical and model misspecifications the two most important assumptions appear to be the tobit assumption used to control for sel f selection into the labor force and exogeneity assumptions on the wi fe s wage rate and her labor market experience copyright 1987 by the econometric society

consistent estimation of censored demand systems using panel data we derive a joint continuous censored commodity demand system for panel data applications unobserved heterogeneity is controlled for using a correlated random effects specification and a generalized method of moments framework used to estimate the model while relatively small differences in elasticity estimates are found between a flexible random effects specification and one that restricts the random effect coefficient to be time invariant larger differences are observed when comparing the flexible model to a pooled cross sectional estimator the results suggest the limited ability of such estimators to control for preference heterogeneity and unit value endogeneity leads to parameter bias

intertemporal substitution in labor supply evidence from micro data the sensitivity of the supply of labor to intertemporal variation in the wage is an important issue in macroeconomics the analysis of social security and pensions and the study of life cycle patterns of work this paper explores two approaches to the measurement of intertemporal substitution that have appeared in the literature the first approach is to use consumption to control for wealth and unobserved expectations about future wages in the labor supply equation the second approach is to estimate a first difference equation for hours in which labor supply from the previous period serves as a control for wealth and wage expectations the results indicate that intertemporal substitution elasticity for married men is positive but small

hospital cost containment and length of stay an econometric analysis 1 introduction concern in the united states over the rising share of national resources consumed by health care costs has become widespread in recent years hospitals accounting for approximately 40 of this expense have been a primary focus of cost control strategy as both government and private insurers have pressured them to absorb an increasing portion of the financial risks associated with their treatment decisions a predominant response to these pressures has been reduction in the number of days that patients remain hospitalized perceptions of compromised medical care quality following this practice and others have prompted policy makers to consider stricter regulation of the conduct of health care providers and insurance organizations the length of hospitalization issue has become prominent with the general public and for some procedures has been widely criticized for being extreme maternity and newborn care for example became a heavy target for insurers who in many cases were limiting reimbursement for stays to only 24 hours this case became very controversial eventually rising to high political ground and resulting in recent congressional action requiring insurers to cover 48 hours of hospitalization for these patients the u s congress as well as numerous state legislatures currently face a number of articles of proposed legislation that directly or indirectly regulate the length of hospitalizations these include measures that give physicians more authority over treatment decisions that make health plans legally liable for their actions and that establish appeals procedures for treatment not deemed medically necessary or appropriate by health plans while controversy surrounding length of stay reductions have focused on the quality of service being delivered by the health care system attention given to the economics of this strategy is limited it is unclear to what extent length of stay reductions are responsible for decreasing hospital costs presumably the inpatient days that are now being eliminated are the least costly ones a provocative stance has been taken by reinhardt 1996 who argues that the strategy of length of stay reduction in the united states is single minded and unproductive he hypothesizes that the hospital is not the expensive setting that is commonly perceived researchers have tracked carefully the trends in hospital lengths of stay and have explored the effects of various reimbursement strategies on hospital utilization previous studies have also addressed the potential tradeoff between length of stay and quality of care if quality has not diminished then longer hospitalizations may have been largely superfluous this is a clinical issue little empirical effort however has been aimed at determining what costs are actually saved by these measures this paper aims to provide evidence on this point rather than asking what health interests might be foregone as a result of shorter hospitalizations the inquiry here is what economic benefits are being gained this research takes a hospital cost function approach to measuring the cost savings achieved by u s hospitals through reduction in length of hospital stays the remainder is organized as follows section 2 provides background to the problem and the next section describes an econometric model for addressing it section 4 presents the data and describes the functional form section 5 discusses empirical results and section 6 provides discussion the final section concludes 2 background and institutional framework broad attempts at controlling hospital expenditures began in the 1980s the most notable single event was the step taken in 1983 by medicare the government program of health care funding for the elderly and hospitals largest third party payer medicare adopted the prospective payment system pps that altered the basis of reimbursement from reasonable cost to prices based on historical costs for specific diagnoses across hospitals

worker displacement and the added worker effect this article examines the added worker effect which is the labor supply response of wives to their husbands job losses unlike past studies which focused on the husbands current unemployment status this article analyzes wives responses before and after job losses to examine the life cycle labor supply adjustments using panel study of income dynamics data reveals small predisplacement effects and large persistent postdisplacement effects the timing of the responses differs with type of displacement possibly because of differences in the information acquired before job loss long run labor supply increases compensate for over 25 of the husbands lost income

is there news in the prime rate using intraday data we find that bank announcements of changes in the prime rate have significant effects on dow jones stock price indexes and yields in the treasury bill futures market we find comparable effects using daily data for indexes of share prices of banks and financial firms as well as interest rates on various maturities of government securities our evidence is consistent with the view that banks have a comparative advantage in processing private information gained through bank borrower relations and the regulatory supervision process

borrowing relationships intermediation and the cost of issuing public securities abstract this paper investigates how an established borrowing relationship affects the costs associated with initial public offerings of equity our model illustrates how the existence of a borrowing relationship reduces the ex ante uncertainty about the value of the issuing firm s equity in the secondary market if underpricing is related to uncertainty a borrowing relationship can reduce underpricing empirically we find that other things equal ipos of firms with previously established borrowing relationships are underpriced substantially less than other ipos

the sensitivity of labor supply parameter estimates to unobserved individual effects fixed and random effects estimates in a nonlinear model using panel data life cycle models of labor supply predict the presence of an unobserved individual effect in the labor supply equation that is correlated with observed explanatory variables leading to an omitted variables bias in the cross section i examine the sensitivity of parameter estimates to the presence of these effects using fixed and random effect tobit models the estimated effects of children are too large in the cross section the estimated intertemporal substitution elasticity ranges from 1 1 to 1 7 the results are similar for fixed and random effects models and for models using different specifications of the dependent variable

bank lending and initial public offerings abstract in this paper we test the hypothesis that banking relations are a signal about firm value we argue that bank processing of asymmetric information and external monitoring of corporate activities reduce the ex ante uncertainty of investors about firm value we demonstrate that the existence of bank debt and or lines of credit lowers the expected initial return associated with initial public offerings the empirical results are robust with respect to the inclusion of variables which reflect other mechanisms that can ameliorate ex ante uncertainty our work adds to the body of evidence that supports the hypothesis that intermediaries provide valuable asset services to corporate borrowers

simulation estimation of two tiered dynamic panel tobit models with an application to the labor supply of married women in this paper a computationally practical simulation estimator is proposed for the two tiered dynamic panel tobit model originally developed by cragg 1971 the log likelihood function simulated through procedures based on a recursive algorithm formulated by the geweke hajivassiliou keane simulator is maximized the simulation estimators are then applied to study the labor supply of married women the rich dynamic structure of the labor force participation decision as well as hours worked decisions that are conditional on the participation of married women are identified by using the proposed simulation estimators the average partial effects of the participation and hours worked decisions for married women in response to fertility decisions and increases in the husband s income are also investigated it is found that the hypothesis that the fertility decision is exogenous and the hypothesis that the husband s income is exogenous to married women s labor supply function are both rejected in the dynamic and static two tiered models moreover children aged between 6 and 13 years old may have a negative impact on the hours worked decision for married women that is conditional on their participation however these children may provide some positive incentives for married women to participate in the labor force copyright 2009 john wiley sons ltd

classification error in dynamic discrete choice models implications for female labor supply behavior two key issues in the literature on female labor supply are i whether persistence in employment status is due to unobserved heterogeneity or state dependence and ii whether fertility is exogenous to labor supply until recently the consensus was that unobserved heterogeneity is very important and fertility is endogenous hyslop 1999 challenged this using a dynamic panel probit model of female labor supply including heterogeneity and state dependence he found that adding autoregressive errors led to a substantial diminution in the importance of heterogeneity this in turn meant he could not reject that fertility is exogenous here we extend hyslop 1999 to allow classification error in employment status using an estimation procedure developed by keane and wolpin 2001 and keane and sauer 2005 we find that a fairly small amount of classification error is enough to overturn hyslop s conclusions leading to overwhelming rejection of the hypothesis of exogenous fertility

monopolistic competition and a firm s product range abstract a model is presented which assumes that firms maximise profits with respect to both the number of varieties supplied as well as the output level of a typical variety the incentive to produce more than one variety comes from a cost advantage due to inter product economies it is found that in a long run free entry equilibrium the industry is characterised by too few product varieties and each variety is over supplied compared to the welfare maximum for any conjectural variation elasticity the former result also holds if the number of firms is held fixed

a model of the demand for investment banking advising and distribution services for new issues this paper presents a theory of the demand for investment banking advising and distribution services for the case in which the investment banker is better informed about the capital market than is the issuer and the issuer cannot observe the distribution effort expended by the banker the optimal contract under which the offer price decision is delegated to the better informed banker in order to deal with the adverse selection and moral hazard problems resulting from the informational asymmetry and the observability problem is characterized the model demonstrates a positive demand for investment banking advising and distribution services and provides an explanation of the underpricing of new issues an investment banker performs three functions which may be of value to an issuer of new securities underwriting advising and distribution this paper presents a theory of the demand for investment banking advising and distribution services based on an informational asymmetry between an issuer of new securities and an investment banker ultimately a theory of the organization of the financial intermediary industry is required that would predict which firms would use which types of financial intermediaries for which purposes and which firms would raise capital without engaging the services of a financial intermediary only a limited set of such predictions are developed here in the context of a model of a fixedprice offering under a negotiated contract in which the investment banker is

new estimates of intertemporal substitution abstract this paper estimates the intertemporal elasticity of substitution for married males taking into account that many individuals are at a corner solution for weeks worked by virtue of working year round the fact that these individuals do not choose to engage in much intertemporal substitution may simply indicate that the corner solution inhibits their ability to do so rather than indicating a low desire to intertemporally substitute our estimates are able to distinguish between these two cases with the results showing much higher intertemporal elasticities of substitution than reported in earlier studies

testing whether unemployment represents intertemporal labour supply behaviour in the lucas rapping 1969 model of the labour market fluctuations in unemployment represent individuals optimally adjusting their labour supply behaviour in response to fluctuations in wage rates over the business cycle in this paper i propose and implement a misspecification test of the lucas rapping treatment of unemployment as labour supply behaviour using panel data this test extends previous such work with micro data by simultaneously allowing for intertemporal substitution uncertainty and endogenous unemployment using the standard specification of intertemporal labour supply behaviour i find strong evidence against this interpretation of unemployment there are two possible interpretations of the test results the first is that it is necessary to turn to alternative models of the labour market in which unemployed workers are off a supply function the second is that the test results indicate the necessity of moving to more complex models of intertemporal substitution however given current econometric techniques and data sets these alternative models of intertemporal substitution will be extremely difficult to test

existence of consistent conjectures reply arthur robson s excellent comment introduces a new formulation of the problem of consistent conjectures my reply uses the new formulation in order to resolve robson s troubling example of nonexistence and to make the problem clearer it also shows why my original approach was sensible only for the linear demand curve case a slightly more general approach used here has consistent conjectures in robson s quadratic inverse demand example

the costs of going public abstract this paper presents evidence regarding the two quantifiable components of the costs of going public direct expenses and underpricing together these costs average 21 22 of the realized market value of the securities issued for firm commitment offers and 31 87 for best efforts offers for a given size offer the direct expenses are of the same order of magnitude for both contract types but the underpricing is greater for best efforts offers an explanation of why some firms choose to use best efforts offers in spite of their apparent higher total costs is given

on strategic cost increases in a duopoly abstract this study determines whether duopolists can profit from imposed cost increases even if both firms are affected equally implicit in any analysis of strategic behavior is the assumption that firms are sufficiently sophisticated to anticipate the new industry equilibrium requiring each duopolist to have consistent conjectures abouts its rival s behavior we show that if the firms marginal cost curves are sufficiently flat increasing the slopes of these curves can raise profits the steeper marginal cost curves encourage regulatory coordination that is the rivals move closer to the joint profit maximizing outcome

monopolistic competition in the spirit of chamberlin special results the idea of large group monopolistic competition was first introduced by chamberlin in i 933 although a large literature has developed on this topic since that time it can be argued that few of the models which have been formulated really capture monopolistic competition in chamberlin s sense in a companion paper to this one hart i 983 a model was presented which it was claimed did satisfy the desiderata of large group monopolistic competition specifically the model had the property that i there were many firms producing differentiated commodities 2 each firm was negligible in the sense that it could ignore its impact on and hence reactions from other firms 3 free entry led to zero profit of operating firms but 4 each firm faced a downward sloping demand curve and hence equilibrium price exceeded marginal cost the model of hart i983 was quite general and only such issues as the existence and limiting properties of equilibrium were considered the purpose of the present paper is to analyse a special case of this model in greater detail and to consider in this context the old question of whether too few or too many brands are produced under monopolistic competition before embarking on the analysis however let me briefly indicate why i believe that there is a need for a new model of monopolistic competition further discussion of this may be found in hart i983 in the last few years a sizeable literature has developed on imperfect competition and product differentiation see for example dixit and stiglitz i977 lancaster i979 salop i979 and spence i976 in much of this literature see for example spence i976 markets of fixed finite size are considered where the entry of firms is limited by the existence of set up costs under these conditions only a finite number of firms can operate and hence firms will not be negligible in the sense of 2 in addition due to the integer problem operating firms will generally make strictly positive profits i e 3 is violated models of

corrigendum on a life cycle model of female labour supply in the empirical work in our article on the intertemporal substitution of leisure time for married women heckman and macurdy 1980 we inadvertently constrained the estimated intertemporal substitution elasticity to be too high since this parameter plays a prominent role in discussions of equilibrium models of the business cycle and since our empirical work has been cited in discussions on this topic e g hall 1980 we would like to present a corrected set of empirical results for our model the period t utility function adopted in this note is in the notation of our original paper equation 15

true monopolistic competition as a result of imperfect information the paper restates hart s 1985a 1985b definition of large group monopolistic competition distinguishes it from oligopolistic competition and raises the question of whether there are reasonable circumstances that give rise to true monopolistic competition as defined the purpose is to show that consumers imperfect information may create conditions that will turn an otherwise oligopolistic market into a truly monopolistically competitive one