rational household labor supply traditionally household behavior is derived from the maximization of a unique utility function in this paper we propose an alternative approach in which the household is modeled as a two member collectivity taking pareto efficient decisions the consequences of this assumption are analyzed in a three good model in which only total consumption and each member s labor supply are observable if the agents are assumed egoistic i e they are only concerned with their own leisure and consumption it is possible to derive falsifiable conditions upon household labor supplies from both a parametric and nonparametric viewpoint if alternatively agents are altruistic restrictions obtain in the nonparametric context useful interpretation stems from the comparison with the characterization of aggregate demand for a private good economy

the case against intellectual property according to a common argument the presence of strong intellectualproperty rights spurs innovation which leads to higher economic growthand increasing benefits for all the argument seems coherent theestablishment of secure property rights is a fundamental pillar of a wellfunctioning market economy no economic agent exercises productiveeffort without the certainty of controlling its fruits what is true forphysical effort must be true for the intellectual one if strong propertyrights provide good incentives for the production of potatoes they mustalso provide good incentives for the production of ideas why then do we argue a case against intellectual property are wearguing that while stealing potatoes is bad stealing ideas is good weare not economic efficiency and common sense argue that ideasshould be protected and available for sale just like any other commodity but intellectual property has come to mean not only the right to ownand sell ideas but also the right to regulate their use this creates asocially inefficient monopoly and what is commonly called intellectualproperty might be better called intellectual monopoly when you buy apotato you can eat it throw it away plant it or make it into a sculpture current law allows producers of a cds and books to take this freedomaway from you when you buy a potato you can use the idea of a potatoembodied in it to make better potatoes or to invent french fries currentlaw allows producers of computer software or medical drugs to take thisfreedom away from you it is against this distorted extension ofintellectual property rights that we argue it is a long jump from the assertion that inventors deserve the fruits oftheir efforts to the conclusion that current patent and copyrightprotection are the best way of providing such reward statements such

sensitivity of the bank stock returns distribution to changes in the level and volatility of interest rate a garch m model abstract the objective of this paper is to employ the generalized autoregressive conditionally heteroskedastic in the mean garch m methodology to investigate the effect of interest rate and its volatility on the bank stock return generation process this framework discards the restrictive assumptions of linearity independence and constant conditional variance in modeling bank stock returns the model presented here allows for shifts in the volatility equation in response to the changes in monetary policy regime in 1979 and 1982 to be estimated arch garch and volatility feed back effects are found to be significant interest rate and interest rate volatility are found to directly impact the first and the second moments of the bank stock returns distribution respectively the latter also affects the risk premia indirectly the degree of persistence in shocks is substantial for all the three bank portfolios and sensitive to the nature of the bank portfolio and the prevailing monetary policy regime

bank s risk taking and ownership structure evidence for economics in transition stage conventional studies assume that inside management plays a major role in corporate governance and argue that foreign institutional investors may lack incentives to monitor invested firms due to their short term profit orientation by utilizing 650 observations of taiwan banks this study examines the effects of specific types of ownership on the risk taking behaviours of banks under differential ownership structures in light of the increasing foreign institution ownership during privatization this article further constructs relative governance strength variables to observe how inside management and foreign institutions interact to affect these banks risk taking the results show that banks with higher inside management ownership and higher government ownership have higher overdue loan and lower capital adequacy ratios banks with higher foreign institution ownership and stronger relative governance strength are associated with lower overdue loans and higher regulatory capital in general the results a

accounting for racial differences in marriage and employment what can account for the differences in marriage and employment decisions across blacks and whites to answer this question i develop a dynamic equilibrium model of marriage two explanations for the racial differences in behavior are considered differences in population supplies and wages black white differences in population supplies explain one fifth of the difference in marriage rates and between one fifth and one third of the differences in employment rates across race removing the racial gap in wages eliminates the differences in employment but increases the differences in marriage rates

volatility persistence and stock valuations some empirical evidence using garch summary in this paper issues of volatility persistence and the changing risk premium in the stock market are investigated using the garch estimation technique we get a point estimate of the index of relative risk aversion of 4 5 and confirm the existence of changing equity premiums in the us during 1962 1985 the persistence of shocks to the stock return volatility is so high that the data cannot reject a non stationary volatility process specification the results of this paper are consistent with malkiel and pindyck s hypothesis that it is the unforseen rise ini the investment uncertainty during 1974 that causes the market to plunge

conditional risk and return in asian emerging markets evidence from the banking sector previous studies reach no consensus on the relationship between risk and return using data from one market this study argues that the market factor should be noticed in assessing the risk return relationship in a partially integrated emerging market the analysis aims to provide new insight into the nature of the risk return relationship by a conditional factor garch m framework that controls for time series effects to investigate the banking sector in five asian emerging markets of china hong kong indonesia malaysia and taiwan during the period 1995 to 2004 finally the study provides evidence on these relations before and after the asian financial crisis of 1997 the results are generally consistent across the markets and with expectations and have implications for empirical assessments of the risk return relationship and diversification

intellectual property rights the industrial revolution and the beginnings of modern economic growth there is a growing consensus that in all cases of successful and unsuccessful economic growth institutions mattered elhanan helpman 2008 daron acemoglu simon johnson and james robinson 2005 somewhat oddly little detailed research has been done to date to relate the industrial revolution the taproot of modern economic growth to its institutional origins but see mokyr 2008 the focus of institutional analysis has been either on earlier episodes of mostly smithian growth such as the commercial revolutions in medieval europe avner greif 2005 or on more modern experiences when good data allowed researchers to have a meaningful debate on how to test hypotheses on the importance of institutions the main argument made about institutions and the british industrial revolution is that political events from the late seventeenth century on created a regime that supported an executive that was sufficiently constrained to create a rule of law and respect private property rights and yet not engage in or permit others to engage in unbridled rent seeking douglass north and barry weingast 1989 kenneth dam 2005 part of this argument is that in this age intellectual property rights ipr began to be increasingly res pected the reason this argument is central is that in the end the industrial revolution was a set of tech nological improvements a few large and dramatic most mundane and incremental the kind of insti tutions that incentivize technological progress differ from those that support the growth of markets by pro tecting property rights it is true that in a wholly lawless society technological progress is unlikely but all the same the institutions that support the different kinds of growth are not likely to be identical indeed one could argue that to some extent the reverse was needed for intellectual property rights the industrial revolution and the beginnings of modern economic growth

match quality new information and marital dissolution this article investigates the role of surprises in marital dissolution surprises consists of changes in the predicted earning capacity of either spouse data from the national longitudinal study of the high school class of 1972 is used we find that an unexpected increase in the husband s earning capacity reduces the divorce hazard while an unexpected increase in the wife s earning capacity raises the divorce hazard couples sort into marriage according to characteristics that are likely to enhance the stability of the marriage the divorce hazard is initially increasing with the duration of marriage and the presence of children and high levels of property stabilizes the marriage

the dynamics of marriage and divorce we formulate and estimate a dynamic model of marriage divorce and remarriage using panel data on two cohorts of danish men and women the marital surplus is identified from the probability of divorce and the surplus shares of husbands and wives from their willingness to enter marriage we find that the educations of husbands and wives are complements education raises the share of the marital surplus for men but not for women as men and women get older husbands receive a larger share of the marital surplus the estimated costs of divorce are high both early and late in marriage

a variance equality test of the icapm on philippine stocks post asian financial crisis period the study examines whether fama s discrete version of merton s intertemporal capm icapm can explain the negative market risk premium and the cross sectional variability of philippine stock returns after the onset of the asian financial crisis in july 1997 the change in foreign exchange rate in addition to the change in market risk premium is used as a state variable of hedging concern to investors the relationship of fama s multifactor minimum variance mmv portfolio to the markowitz minimum variance mv portfolio is characterized in terms of the equality of the return variances for the same expected return a test due to basak et al 2002 is then used to verify the equality of the return variance of a derived tangency portfolio along the mmv frontier to an mv portfolio with the same sample mean return the results do not reject the icapm during the period covered by the study thus the model provides a plausible explanation both for the cross sectional variability of stock returns and the nega

who marries whom and why this paper proposes and estimates a static transferable utility model of the marriage market the model generates a nonparametric marriage matching function with spillover effects it rationalizes the standard interpretation of marriage rate regressions and points out its limitations the model was used to estimate u s marital behavior in 1971 72 and 1981 82 the marriage matching function estimates show that the gains to marriage for young adults fell substantially over the decade unlike contradictory marriage rate regression results the marriage matching function estimates showed that the legalization of abortion had a significant quantitative impact on the fall in the gains to marriage for young men and women

how does the marriage market clear an empirical framework the paper surveys the choo and siow 2006a cs marriage matching model and its extensions cs derives a behavioural marriage matching function the collective model of intra household allocations can be integrated into this framework spousal labour supplies respond to changing marriage market conditions marriage market tightness the ratio of unmarried type i men to unmarried type j women is a sufficient statistic for marriage market conditions for those types of individuals the hypothesis that spousal labour supplies vary to equilibrate the marriage market has overidentifying restrictions the framework extends to a dynamic marriage matching environment empirically this paper shows how the famine caused by the great leap forward in sichuan affected the marital behaviour of famine born cohorts marriage market tightness is shown to be a useful statistic for summarizing marriage market conditions in the united states marriage market conditions in the contemporary united states primarily affect spousal labour force participation rather than hours of work ce texte examine le modele de choo et siow et ses extensions ce modele derive une fonction comportemental d arrimage sur le marche du mariage le modele d allocation intra menage des t ches peut s integrer a ce cadre d analyse les offres de travail des epoux repondent aux conditions changeantes du marche du mariage un marche du mariage serre un ratio d hommes celibataires de type i par rapport a un nombre de femmes celibataires de type j constitue une statistique suffisante pour etablir les conditions de marche de ces types d individus l hypothese que les offres de travail des epoux varient pour equilibrer le marche du mariage engendre des restrictions de sur identification le cadre d analyse couvre le cas d un environnement dynamique d arrimage empiriquement ce memoire montre comment la famine causee par le grand saut en avant de sichuan a affecte le comportement de mariage des cohortes qui en sort sorties on montre aussi que le caractere serre du marche du mariage aux etats unis fournit une statistique utile pour prendre le pouls des conditions du marche du mariage ces conditions dans le monde contemporain aux etats unis ont un impact sur la participation des epoux au marche du travail plutot que sur les heures travaillees

women s college decisions how much does marriage matter this article investigates the sequential college attendance decision of young women and quantifies the effect of marriage expectations on their decision to attend and graduate from college a dynamic choice model of college attendance labor supply and marriage is formulated and structurally estimated using panel data from the nlsy79 the model is used to simulate the effects of no marriage benefits and finds that the predicted college enrollment rate will drop from 58 0 to 50 5 using the estimated model the college attendance behavior for a younger cohort from the nlsy97 is predicted and used to validate the behavioral model

a model of discovery empirical research has reached the puzzling conclusion that stronger patents do little or nothing to encourage innovation we show that the facts that have led to the assumption of fixed cost in the discovery process can be equally well explained by a standard model of diminishing returns this may explain much of the misunderstanding of the supposedly positive role of monopoly in innovation and growth thereby accounting for the empirical puzzle

the sensitivity of bank stock returns to market interest and exchange rate risks abstract this paper presents and estimates a multifactor model of bank stock returns that incorporates market return interest rate and exchange rate risk factors a model of the optimizing behavior of an international banking firm is used to derive the sensitivity coefficients of the alternative factors regression equations are estimated that are based on either actual or unexpected values of the underlying factors with a post october 1979 time dummy variable and with a money center bank dummy variable standard results are obtained for the market and interest rate variables while new results are derived for the exchange rate variable the specific effects of the latter variable are found to be dependent on the time period of observation and the money center status of banks

dynamic marriage matching an empirical framework the paper proposes a dynamic version of the frictionless becker shapley shubik marriage matching model with transferable utility its primary objective is to develop a tractable model that rationalizes the marriage distribution of who marries whom by age this behavioral dynamic model rationalizes a new marriage matching function an empirical methodology that relies on the equilibrium outcomes of the model identies the marital preferences over spouses this framework also allows the inverse problem of computing the vector of aggregate marriages given a new distribution of available single individuals and estimated preferences to be solved the solution to this inverse problem has been shown to exist under mild conditions this paper also develops a simple test of the model s empirical validity using aggregate data of new marriages and available single men and women in the us in 1970 1980 and 1990 i investigate the changes in the gains to marriage over this period

invariance of expected utilities in logit models abstract an unnoticed and restrictive property of the logit model is proved the expected utility or expected utility change conditional on having selected an alternative i is invariant over all alternatives in the choice set this limits the use of logit in situations where expected utilities should realisticly vary by choice made the probit model is not subject to this restriction

forecasting volatility of futures market the s p 500 and ftse 100 futures using high frequency returns and implied volatility we show that historical volatility from high frequency returns outperforms implied volatility when standardized returns by historical volatility tends to be normally distributed for the ftse 100 futures we find that historical volatility using high frequency returns outperforms implied volatility in forecasting future volatility however we find that implied volatility outperforms historical volatility in forecasting future volatility for the s p 500 futures the results also indicate that historical volatility using high frequency returns could be an unbiased forecast for the ftse 100 futures 1 we thank christopher lowes for his excellent research assistance

stock returns and volatility most asset pricing models postulate a positive relationship between a stock portfolio s expected returns and risk which is often modeled by the variance of the asset price this paper uses garch in mean models to examine the relationship between mean returns on a stock portfolio and its conditional variance or standard deviation after estimating a variety of models from daily and monthly portfolio return data we conclude that any relationship between mean returns and own variance or standard deviation is weak the results suggest that investors consider some other risk measure to be more important than the variance of portfolio returns