nonlinear pricing to produce information we investigate the firm s dynamic nonlinear pricing problem when facing consumers whose tastes vary according to a scalar index we relax the standard assumption that the firm knows the distribution of this index in general the firm should determine its marginal price schedule as if it were myopic and produce information by lowering the price schedule bunching consumers at positive purchase levels should be avoided as a special case we also consider a market characterized by homogeneous consumers with a static but unknown demand curve we show that when there are repeat purchases the forward looking firm should tend towards penetration pricing otherwise its strategy should tend towards skimming we extend our insights to more general settings and discuss implications for pricing product lines

inventory and sales effort management under unobservable lost sales a retailer needs to make decisions regarding how much to order and how much sales effort to exert in an environment with uncertain demand one intrinsic complexity in a typical retail environment is caused by the fact that the retailer can obtain information about demand only based on sales as demand itself is unobservable taking a bayesian approach lariviere and porteus 1999 show that in such a setting a retailer should stock more to increase the probability of an exact demand observation in this article we extend their work by allowing the retailer to control both the stocking quantity and sales effort which can be used to affect demand we show that their insights with respect to information stalking carry over to this setting in addition our model allows gaining a better understanding of optimal sales effort strategies we find that demand management has a dual role in supporting information gathering while at the beginning of a product life cycle it is optimal to support learning effects by sharply reducing sales effort at later stages of the product life cycle an aggressive strategy of increased promotional activities can be used to harvest the information gathered in earlier periods

schooling fertility and the labour market experience of married women a model of career path choice is constructed for a sample of women taken from the 1991 us national household education survey this allows for simultaneity and selection effects in the relationship between regime choice and earning it is established that inter alia expected earnings have a significant impact on the career path and the hours of work chosen by american women the role played by formal schooling and by childrearing in the determination of carrier path is highlighted and implications are discussed

a political economic analysis of congressional voting patterns on nafta this paper delves into the question of the determinants of congressional voting on nafta it uses a logit model to examine both house and senate votes and is able to use district specific estimates in the former it finds only very limited support for the thesis that narrowly defined employment gainers and losers were important determinants of congressional voting patterns though some substantial support that districts that were highly agricultural or already possessed a substantial hispanic population and skilled labor force and had the most to gain from the general effects of nafta lead to a positive effect on the probability that a member of the house would vote affirmatively contributions from labor unions lowered the likelihood of affirmative votes political partisanship and ideological positions apparently had little effect on the votes a representative s political capital had a marginally significant effect on the probability on an affirmative vote but it performed positively in the senate and negatively in the house

exchange rate volatility international trade and resource allocation a perspective on recent research abstract recent research on the effects of exchange rate volatility is discussed and directions for future research are explored the need to pay more attention to the effects of diversification and firms characteristic is emphasized it is suggested that while international risk has risen substantially since floating the differential between international and domestic risk may not this could help explain the failure of international trade to fall drastically and suggests that exchange rate volatility has been more a reflection than an independent cause of underlying instability

confidence based optimisation for the newsvendor problem under binomial poisson and exponential demand abstract we introduce a novel strategy to address the issue of demand estimation in single item single period stochastic inventory optimisation problems our strategy analytically combines confidence interval analysis and inventory optimisation we assume that the decision maker is given a set of past demand samples and we employ confidence interval analysis in order to identify a range of candidate order quantities that with prescribed confidence probability includes the real optimal order quantity for the underlying stochastic demand process with unknown stationary parameter s in addition for each candidate order quantity that is identified our approach produces an upper and a lower bound for the associated cost we apply this approach to three demand distributions in the exponential family binomial poisson and exponential for two of these distributions we also discuss the extension to the case of unobserved lost sales numerical examples are presented in which we show how our approach complements existing frequentist e g based on maximum likelihood estimators or bayesian strategies

primary schooling cognitive skills and wages in south africa using a fairly rich data set from south africa the paper finds that despite the sobriquet gutter education the african schooling systems help to create cognitive skills and these skills are a determinant of wage levels various robust estimators are used but the influential outlier problem does not turn out to be serious computational skills appear to be more important than comprehension skills in influencing wages the african primary schooling system was an extremely poor generator of computational skill the seven year course raising the computational test score by 13 if that a policy implication is that productivity could be raised by certain near costless reallocations of resources in favour of mathematical learning

monotone instrumental variables with an application to the returns to schooling for fifty years econometric analyses of treatment response have made extensive use of instrumental variable iv assumptions holding that mean response is constant across specified subpopulations of a population of interest 2 yet the credibility of mean independence conditions and other iv assumptions has often been a matter of considerable disagreement with much debate about whether some covariate is or is not a valid instrument in an application of interest there is therefore good reason to consider weaker but more credible assumptions to this end we introduce monotone instlumental variable miv assumptions holding that mean response varies weakly monotonically across specified subpopulations we study the identifying power of these miv assumptions and give an empirical application the findings reported here add to the literature developing nonparametric bounds on treatment effects 3 this paper uses the same formal setup as manski 1997 there is a probability space j x2 p of individuals each member j of population j has observable covariates xi e x and a response function yj t y mapping the mutually exclusive and exhaustive treatments t e t into outcomes yj t e y person j has a realized treatment zj e t and a realized outcome y 1 y zi both of which are observable the latent outcomes yj t

the estimation of human capital by administrative archives in a static and longitudinal perspective the case of milan this paper focuses on the estimation of the latent variable human capital hc at disaggregated level worker by available routinely institutional data flows in particular we utilize the lombardy region administrative archive employment centers of the province of milan collecting information about careers of workers in the private sector of the milan area and administrative flows collecting mandatory workers individual income tax returns filed with the national internal revenue service first we propose and empirically estimate hc scores in a static referred to 2004 framework by means of a realistic measurement model within causal relationships among endogenous and exogenous investment hc indicators furthermore the model also specifies a set of concomitant indicators that not belonging to hc investment indicators have causal impact on endogenous variables and on hc scores too second we propose a longitudinal analysis period 2000 2004 aimed to investigate how workers earned income growth rates vary over workers educational levels and other personal characteristics the empirical results of both analyses confirm the characteristics of the italian job market denoted by marked inequalities and knowledge regarding the process of school to work transition characterized by a weak incidence of education on longitudinal trajectories of earned income

learning experimentation and the optimal output decisions of a competitive firm this paper considers the effect of learning from experience on the output decisions of a perfectly competitive firm faced with the demand uncertainty specifically a bayesian framework for expectations formation and demand forecasting by a perfectly competitive firm is presented focusing the analysis on the determination of optimal sequential output decisions it is shown that through output experimentation the experimenting firm will select a non myopic sequential policy and will tend to overproduce the exact magnitude of the overproduction and the economic value of experimentation are contingent upon model parameters and the length of the planning horizon

factors affecting levels and growth rates in the wage rates of women evidence from nursing using data from two surveys of nurses 1981 and 1989 the study examines the factors affecting the levels and growth rates in the wage rates paid to women especially married women who were licensed as registered nurses our results indicate that the influence of such household characteristics as marital status age and number of children and spouse s characteristic tended to diminish over the 1980s the evidence further suggests that the penalties for frequent switches in employment state were larger at the end of the decade than at the beginning further wages paid to nurses with baccalaureates were statistically the same as those paid to nurses with lesser formal education the return to the baccalaureate appears to be in the form of the higher wages and salaries earned by those who obtain post baccalaureate degrees

protectionist pressures and aggregate economic conditions comment on takacs this paper explores the influence of u s macroeconomic conditions and the international trade position on protectionist pressures as measured by escape clause cases brought before the international trade commission several possible difficulties with takacs pioneering empirical study of this topic are considered it is argued that while further support is found for her principal conclusion that the state of the domestic economy is a significant determinant of such protectionist pressures the quantitative strength of such aggregate factors is less than was suggested by takacs original study

are ols estimates of the return to schooling biased downward another look the authors examine evidence on bias in ols estimates of the economic return to schooling to study omitted ability bias they use test scores available in the national longitudinal survey of youth as proxies for ability allowing for measurement error in these test scores the authors also explore biases from the endogeneity of schooling or experience or measurement error in these variables in their data ols estimation including test scores appears to be appropriate and indicates an upward bias of roughly 40 percent in the ols estimate ignoring ability this contrasts with evidence from other recent research using different statistical experiments to purge schooling of its correlation with the wage equation error copyright 1995 by mit press

statistical learning of service dependent demand in a multiperiod newsvendor setting we study an inventory system wherein a customer may leave the seller s market after experiencing an inventory stockout traditionally researchers and practitioners assume a single penalty cost to model this customer behavior of stockout aversion recently a stream of researchers explicitly model this customer behavior and support the traditional penalty cost approach we enrich this literature by studying the statistical learning of service dependent demand we build and solve four models a baseline model where the seller can observe the demand distribution a second model where the seller cannot observe the demand distribution but statistically learns the demand distribution a third model where the seller can learn or pay to obtain the exact information of the demand distribution and a fourth model where demand in excess of available inventory is lost and unobserved interestingly we find that all four models support the traditional penalty cost approach this result confirms the use of a state independent stockout penalty cost in the presence of demand learning more strikingly the first three models imply the same stockout penalty cost which is larger than the stockout penalty cost implied by the last model

observation bias the impact of demand censoring on newsvendor level and adjustment behavior in an experimental newsvendor setting we investigate three phenomena level behavior the decision maker s average ordering tendency adjustment behavior the tendency to adjust period to period order quantities and observation bias the tendency to let the degree of demand feedback influence order quantities we find that in three of four conditions the portion of mismatch cost that results from adjustment behavior exceeds the portion of mismatch cost caused by level behavior observation bias is studied through censored demand feedback a situation that arguably represents most newsvendor settings when demands are uncensored subjects tend to order below the normative quantity when they face high margin and above the normative quantity when they face low margin but in neither case do they order beyond mean demand the pull to center effect censoring in general leads to lower quantities magnifying the below normative level behavior when they face high margin but partially counterbalancing the above normative level behavior when they face low margin violating the pull to center effect in both cases data as supplemental material are available at http dx doi org 10 1287 mnsc 2013 1825 this paper was accepted by christian terwiesch operations management

bayes solution to dynamic inventory models under unknown demand distribution this paper considers the periodic review inventory problem for which one or more parameters of the demand distribution are unknown with a known prior distribution chosen from the natural conjugate

the political economy of nontariff barriers a cross national analysis nontariff barriers to trade are most pervasive when deteriorating macroeconomic conditions give rise to demands for protection by pressure groups when countries are sufficiently large to give policymakers incentives to impose protection and when domestic institutions enhance the ability of public officials to act on these incentives statistical results based on a sample of advanced industrial countries during the 1980s support the argument that the incidence of nontariff barriers tends to be greatest when the preferences of pressure groups and policymakers converge more attention should be devoted to the interaction between societal and statist factors in cross national studies of trade policy

on the censored newsvendor and the optimal acquisition of information we have read ding et al 2002 referred to hereafter as dpb with great interest dpb con ains two main results theorem a claims that the myopic inventory level is a lower bound on the optimal inventory level and theo rem b attempts to quantify the marginal expected value of information however there are mistakes in the proof of theorem a the result itself is correct a proof is given in lu et al 2004 furthermore one of the erroneous expressions in dpb s proof leads to an error in the marginal expected value of information in theorem b we now provide more details the equation numbers unless specified otherwise refer to the appendix of dpb available at the operations research home page http or pubs informs org the main error in the proof of theorem a is the follow ing if a x and b x are two functions of the variable jc then the derivative of a x b x with respect to x is d r x m da x db x a x b x b x a x dpb s mistake in essence is to omit the second term more specifically a key step in proving theorem a is inequality 35

the censored newsvendor and the optimal acquisition of information this paper investigates the effect of demand censoring on the optimal policy in newsvendor inventory models with general parametric demand distributions and unknown parameter values we show that the newsvendor problem withobservable lost sales reduces to a sequence of single period problems while the newsvendor problem withunobservable lost sales requires a dynamic analysis using a bayesian markov decision process approach we show that the optimalin ventory level in the presence of censored demand ishigher than would be determined using a bayesian myopic policy we explore the economic rationality for this observation and illustrate it with numerical examples

learning about heterogeneity in returns to schooling using data from the national longitudinal survey of youth nlsy we introduce and estimate various bayesian hierarchical models that investigate the nature of unobserved heterogeneity in returns to schooling we consider a variety of possible forms for the heterogeneity some motivated by previous theoretical and empirical work and some new ones and let the data decide among the competing specifications empirical results indicate that heterogeneity is present in returns to education furthermore we find strong evidence that the heterogeneity follows a continuous rather than a discrete distribution and that bivariate normality provides a very reasonable description of individual level heterogeneity in intercepts and returns to schooling

the political economy of ec protectionism national protectionism based on article 115 treaty of rome this paper investigates the trade policy of the ec based on art 115 treaty of rome it is shown that politicians and bureaucrats take advantage of the significant discretion the procedure allows political and bureaucratic self interest are the underlying motives for national trade barriers against non member countries based on art 115 the empirical results support this hypothesis

the failure of input based schooling policies in an effort to improve the quality of schools governments around the world have dramatically increased the resources devoted to them by concentrating on inputs and ignoring the incentives within schools the resources have yielded little in the way of general improvement in student achievement this paper provides a review of the us and international evidence on the effectiveness of such input policies it then contrasts the impact of resources with that of variations in teacher quality that are not systematically related to school resources finally alternative performance incentive policies are described

human capital reservation wages and job competition heckman s lambda re interpreted this study integrates insights from three theories into a single model explaining the simultaneous distribution of employment and wages human capital theory is taken as the general framework whereas search theory and the more recent crowding or job competition hypothesis are used to explain selectivity in employment and the resulting bias in wage regressions an empirical test on belgian data using a two stage probit ols model indicates that the crowding theory dominates the search hypothesis for men for women it seems to be outweighed by relatively higher reservation wages probably due to women s different behaviour with respect to family responsibilities

the impact of host country schooling on earnings a study of male immigrants in the united states immigrants in the united states who acquire u s schooling earn higher wages than other immigrants using data from the u s censuses and the national longitudinal survey of youth we show that this wage advantage results from both greater educational attainment and higher returns to education the higher returns are not the consequence of ability bias or greater english proficiency of those who acquire u s schooling returns to years of non u s education are higher for immigrants who complete their schooling in the united states consistent with the view that u s schooling upgrades or certifies education received in the source country for those without u s schooling returns are higher for immigrants from highly developed countries and countries for which english is an official language

demand estimation and ordering under censoring stock out timing is almost all you need retailers facing uncertain demand can use observed sales to update demand estimates however such learning is limited by the amount of inventory carried when demand exceeds inventory i e when a stock out event occurs a retailer in general cannot observe actual demand we propose using observations on the timing of sales occurrences in a bayesian fashion to learn about demand and we analyze this learning method for a multiperiod newsvendor setting we find that as previously shown with the use of only stock out event observations the optimal order quantity with timing observations is greater than the optimal order quantity with full demand observations we prove this result using a novel methodology from the statistics literature on comparison of experiments although the optimal over ordering with timing observations tends to be less than that with only stock out event observations in most cases we do observe cases where the opposite is true such cases correspond to high demand uncertainty and low margins where marginal learning from timing observations is significantly higher than using only a stock out event in an extensive numerical study we find that on average and with respect to uncensored demand observations the use of timing observations eliminates 76 1 of the loss in expected profit from using only stock out event observations we show that for poisson and normal demand with unknown mean the proposed learning method is tractable as well as intuitively appealing the information contained in the timing of sales occurrences is fully captured by a single number the timing of stock out we also investigate checkpoint models in which the newsvendor can make observations only at predetermined times in a period and illustrate its convergence to the models with timing and stock out event observations

life expectancy schooling time retirement and growth i analyze how changes in life expectancy affect retirement age education time and growth rates of economies i set up a continuous time overlapping generations model of endogenous growth with externalities in human capital production i find that increases in life expectancy give rise to first higher retirement ages and second higher education spans a threshold level for life expectancy exists such that per capita growth rates follow an inverted u pattern i introduction in this article i analyze how changes in life expectancy may affect optimal education time retirement age and the growth rates of economies to this end i set up a continuous time overlapping generations growth model with human capital accumulation that i solve numerically the issue of the effects of the reduction in mortality rates and the resulting increases in life expectancy on economic growth rates has been recently addressed in the literature through both empirical and theoretical studies along these lines i focus on human capital acquisition and its transmission across generations as the force driving the growth rate concerning empirical studies the hypothesis that the reduction in mortality rates has caused higher levels of investment in human capital and therefore augmented growth rates is partially supported for various economies thus kalemli ozcan et al 2000 show an increase in life expectancy at birth along with an increase in average numbers of years of schooling in england they claim that after averaging across lower income countries there is apparently a connection between increases in life expectancy at birth and increases in gross secondary school enrollment that is positively connected with higher growth rates observed preliminary data from latin american and caribbean countries show that gross domestic product gdp growth is statistically associated with life expectancy for instance estimates based on data from mexico suggest that for any additional year of life expectancy there will be an additional 1 increase in gdp 15 years later see world health organization 1999 box 1 2 9 along the same lines rodriguez and sachs 1999 also find a positive effect of life expectancy on gdp growth for the case of venezuela barro and sala i martin 1995 estimate for a sample of 97 countries that a 13 year increment in life expectancy would increase the per capita growth rate by 1 4 per year they also find however some exceptions where increments in life expectancy have not resulted in higher growth even though all of them exhibited higher schooling levels in the period 1960 85 malmberg 1994 gives another exception higher growth was achieved when middle aged persons were numerous whereas increases in dependent age groups led to lower per capita growth in sweden finally some other studies find mixed evidence so that increments in life expectancy result in higher growth rates for low levels of life expectancy but in lower growth rates for high levels of life expectancy see zhang et al 2003 and references therein a common result in most theoretical studies that include some sort of human capital is that an increase in life expectancy lengthens the period needed to recover investment in human capital which translates into higher returns to individual education or human capital investment this augmented return will give rise to higher levels of investment in human capital which in turn will raise growth rates ehrlich and lui 1991 show in a three overlapping generations model how improvements in longevity lower fertility thus raising educational investment and long term growth meltzer 1995 finds that mortality reductions may favor economic growth by increasing educational investment kalemli ozcan et al 2000 show in an overlapping generations model a la blanchard that if mortality drops life expectancy increases so that an augmented life horizon to enjoy the return to human capital investment gives rise to higher schooling human capital investment although growth is not affected because the growth rate in their model is identically equal to zero

optimal inventory decisions in a multiperiod newsvendor problem with partially observed markovian supply capacities abstract this paper considers a multi period news vendor problem with partially observed supply capacity information which evolves as a markovian process the supply capacity is fully observed by the buyer when the capacity is smaller than the buyer s ordering quantity otherwise the buyer knows that the current period supply capacity is greater than its ordering quantity based on these two observations the buyer updates the future supply capacity forecasting accordingly with a dynamic programming formulation we prove the existence of an optimal ordering policy we also prove that the optimal order quantity is greater than the myopic order quantity

adaptive data driven inventory control with censored demand based on kaplan meier estimator using the well known product limit form of the kaplan meier estimator from statistics we propose a new class of nonparametric adaptive data driven policies for stochastic inventory control problems we focus on the distribution free newsvendor model with censored demands the assumption is that the demand distribution is not known and there are only sales data available we study the theoretical performance of the new policies and show that for discrete demand distributions they converge almost surely to the set of optimal solutions computational experiments suggest that the new policies converge for general demand distributions not necessarily discrete and demonstrate that they are significantly more robust than previously known policies as a by product of the theoretical analysis we obtain new results on the asymptotic consistency of the kaplan meier estimator for discrete random variables that extend existing work in statistics to the best of our knowledge this is the first application of the kaplan meier estimator within an adaptive optimization algorithm in particular the first application to stochastic inventory control models we believe that this work will lead to additional applications in other domains

learning consumer tastes through dynamic assortments how should a firm modify its product assortment over time when learning about consumer tastes in this paper we study dynamic assortment decisions in a horizontally differentiated product category for which consumers diverse tastes can be represented as locations on a hotelling line we presume that the firm knows all possible consumer locations comprising a finite set but does not know their probability distribution we model this problem as a discrete time dynamic program each period the firm chooses an assortment and sets prices to maximize the total expected profit over a finite horizon given its subjective beliefs over consumer tastes the consumers then choose a product from the assortment that maximizes their own utility the firm observes sales which provide censored information on consumer tastes and it updates beliefs in a bayesian fashion there is a recurring trade off between the immediate profits from sales in the current period exploitation and the informational gains to be exploited in all future periods exploration we show that one can partially order assortments based on their information content and that in any given period the optimal assortment cannot be less informative than the myopically optimal assortment this result is akin to the well known stock more result in censored newsvendor problems with the newsvendor learning about demand through sales when lost sales are not observable we demonstrate that it can be optimal for the firm to alternate between exploration and exploitation and even offer assortments that lead to losses in the current period in order to gain information on consumer tastes we also develop a bayesian conjugate model that reduces the state space of the dynamic program and study value of learning using this conjugate model

returns to schooling and bayesian model averaging a union of two literatures abstract in this paper we review and unite the literatures on returns to schooling and bayesian model averaging we observe that most studies seeking to estimate the returns to education have done so using particular and often different across researchers model specifications given this we review bayesian methods which formally account for uncertainty in the specification of the model itself and apply these techniques to estimate the economic return to a college education the approach described in this paper enables us to determine those model specifications which are most favored by the given data and also enables us to use the predictions obtained from all of the competing regression models to estimate the returns to schooling the reported precision of such estimates also account for the uncertainty inherent in the model specification using u s data from the national longitudinal survey of youth nlsy we also revisit several stylized facts in the returns to education literature and examine if they continue to hold after formally accounting for model uncertainty

stalking information bayesian inventory management with unobserved lost sales retailers are frequently uncertain about the underlying demand distribution of a new product when taking the empirical bayesian approach of scarf 1959 they simultaneously stock the product over time and learn about the distribution assuming that unmet demand is lost and unobserved this learning must be based on observing sales rather than demand which differs from sales in the event of a stockout using the framework and results of braden and freimer 1991 the cumulative learning about the underlying demand distribution is captured by two parameters a scale parameter that reflects the predicted size of the underlying market and a shape parameter that indicates both the size of the market and the precision with which the underlying distribution is known an important simplification result of scarf 1960 and azoury 1985 which allows the scale parameter to be removed from the optimization is shown to extend to this setting we present examples that reveal two interesting phenomena 1 a retailer may hope that compared to stocking out realized demand will be strictly less than the stock level even though stocking out would signal a stochastically larger demand distribution and 2 it can be optimal to drop a product after a period of successful sales we also present specific conditions under which the following results hold 1 investment in excess stocks to enhance learning will occur in every dynamic problem and 2 a product is never dropped after a period of poor sales the model is extended to multiple independent markets whose distributions depend proportionately on a single unknown parameter we argue that smaller markets should be given better service as an effective means of acquiring information

order from chaos the effects of early labor market experiences on adult labor market outcomes this paper examines the consequences of initial periods of churning or mobility in the labor market to help assess whether faster transitions to stable employment relationships as envisioned by advocates of school to work programs would be likely to lead to better adult labor market outcomes an analysis of national longitudinal survey of youth data for the years 1979 92 yields modest evidence at best linking early job market stability to better labor market outcomes the authors find that for both genders adult labor market outcomes defined as of the late 20s or early to mid 30s are for the most part unrelated to early labor market experiences this evidence does not support efforts to explicitly target the school to work transition insofar as doing so implies changing the structure of youth labor markets so that workers form earlier and firmer attachments to employers industries or occupations

investigating efficiency in betting markets evidence from the greek 6 49 lotto abstract in this paper we investigate the existence of profit opportunities in the greek market for the 6 49 lotto under the assumption of random number selection we find evidence suggesting that the market is efficient because number selection is found to deviate from randomness we further investigate the existence of profit opportunities due to number unpopularity the evidence suggests that although unpopular numbers exist they are not sufficiently unpopular so as to generate positive expected payoffs

the textile bill of 1985 the determinants of congressional voting patterns the following tables show the results of the probit analysis for the senate and the house a table including results for different combinations of the independent variables is included in an unpublished appendix available from the authors upon request the results of the probit analysis for the senate are shown in table 1 all the variables except exp had the expected signs however the results indicate that the two other employment variables and party affiliation are the only factors which we can say with confidence influenced a senator s decision to vote for or against this bill the coefficients reported and labeled der of prob measure the derivative of the probability of a yes vote evaluated at the means of the independent variables in question thus for example the coefficient for unemp in the top line of table 1 should be interpreted as indicating that a one percentage point increase in a state s unemployment rate will cause a 5 89 increase in the probability that the senator will vote for the bill the result for dr the party of the senator shows that in general democrats are more apt to vote for protectionist policies than are republicans this is consistant with president reagan s negative stand on the bill and his threat to veto it should it pass the amendment in question passed the senate on 24 october 1985 by a vote of 54 for to 42 against but the bill it was attached to has been postponed indefinitely the house bill which was passed on 10 october 1985 by a vote of 262 for to 159 against was vetoed by reagan on 17 december 1985 the results of the probit analysis for the house of representatives are shown in table 2 state employment data was used for the house as opposed to data for each voting district this was done for three reasons first employment data is usually reported by state or by county since counties are often divided by congressional district boundaries much personal judgement would be necessary to assign employment figures second the most recent county industry employment data is from 1981 while the data used in this analysis is from 1984 third we feel that in general logrolling is prevalent among a state s representatives for this bill the representatives from twenty six states voted as a block and in all but six states one third or less of that state s representatives voted contrary to the majority all of the probabilities are significant at the 05 confidence level representative s voting patterns are influenced by all of the included factors when unionization is added to the equation its coefficient is very small and negative although it is significant at the 05 confidence level one would expect more significance here since there are more degrees of freedom for the house analysis than for that of the senate when the data from the house and senate are pooled the results are similar to those of the house alone the null hypothesis that the data cannot be pooled was tested using a statistic with eight degrees of freedom 9 721 meaning that the null hypothesis is rejected as in the senate the state unemployment rate and the percent employed in textiles are important influences on the representative s vote and democrats in the house are more likely to vote for protectionist bills than republicans however unlike the senate the percent of a representative s campaign contributions that are donated by industry special interest groups has a significant effect on voting patterns although the point estimates for the magnitudes of the influence are very similar in both cases seventy four percent of the house received campaign contributions from these special interest groups while only 54 of the senate received contributions from these same sources this is probably because only one third of the senate was up for reelection during the time period considered while the entire house was in the process of campaigning for reelection exports also play a role in influencing the probability of a yes vote reducing this probability as employment in export industries increases but the magnitude of the coefficient is only 11 of that for textile employment the significance of this variable in the house is probably due to fear of retaliation expressed by both democrats and republicans this variable was not significant in the senate model most likely because the senate version excluded from the 1 import quota growth rate many countries who might have retaliated representatives appear to respond to a wider variety of constituent interests than do senators while senators voting patterns are only significantly influenced by their political affiliation their state s unemployment rate and the importance of textiles to their state the voting behavior of representatives is influenced by these factors as well as the importance of exports to their state and campaign contributions by textile special interest groups these results affirm the validity of the approach used by baldwin and coughlin they differ from baldwin who finds exports are not a significant influence on the house and from coughlin who does not include export employment as an explanitory variable or analyze the differences in voting patterns between the house and the senate

combining rent seeking and public choice theory in the analysis of tariffs versus quotas economists continuing criticisms of protectionism make a valuable contribution to the general interest element of the forces which operate to keep propensities to protect somewhat in check mckenzie rightly warns however that proposals by economists for giving protection in more efficient forms run the danger of increasing the total supply of protection thus we agree that serious consideration should be given to the political economy responses which may be induced before one advocates ways of doing more efficiently what one believes should not be done in the first place it does not follow however that all such policies will have net negative unanticipated consequences in the case of tariffs versus quotas we do not believe that we have yet sufficient knowledge of all of the relevant political economy considerations to predict about the full effects of legislation which allowed trade protection to only take the form of tariffs we are doubtful however that such a measure would increase the total quantity of protection through the channels outlined by mckenzie we believe that the same type of basic public choice analysis of the individual incentives to lobby which suggests that consumer taxpayers will not force the political process to operate so as to maximize aggregate economic efficiency with respect to the level of protection also suggests that the net lobbying for quotas is likely to be higher on average than the net lobbying for tariffs political effectiveness and ability to overcome free riding on the part of tariff revenue seekers is likely to be low at the margin furthermore issues of visibility and institutional structure are likely to lessen the ability of anti protection forces to lobby against quotas placed within a broader framework public choice and rent seeking theory is consistent with the empirical evidence that where quotas are used protection is high

the behavior of regulatory activity over the business cycle an empirical test this paper tests a prediction of the interest group theory of regulation which suggests that regulators generally will not force any one group to bear the full adjustment costs associated with variations in the business cycle that is the interest group model predicts that regulatory agencies will redistribute cyclical gains and losses by supplying more producer protection regulation during contractions and more consumer protection regulation during expansions i e regulatory activity which reduces consumer welfare will tend to be countercyclical intensifying when aggregate demand falls and abating as demand increases the empirical results show a countercyclical and statistically significant ceteris paribus relationship between federal trade commission enforcement efforts under the robinson patman act and several alternative measures of general business conditions since the robinson patman act is viewed widely as anti consumer the findings suggest that in cyclical downturns the commission moves to protect producers against losses by bringing more cases which limit the tendency for prices to fall this result may be rationalized under the view that during recessions the federal trade commission is in the business of transferring wealth from consumers either to protect small business or to bolster cartels on the other hand during business expansions the commission reduces its robinson patman case load and such a change in enforcement may serve to mitigate producer gains transferring wealth to consumers at the margin in any case the paper offers empirical support for the interest group model by providing evidence that the business cycle plays an important part in explaining the level and pattern of regulatory activity

estimating the economic return to schooling on the basis of panel data this paper is concerned with estimating the economic return to schooling of men in the netherlands an iv approach is adopted to estimate a panel data model with random individual effects the fact that older individuals have relatively less schooling than younger individuals is exploited to construct instruments and gnp per worker at the time an individual turned 16 is included to control for birth cohort effects the estimated return to schooling is about 15 ignoring the endogeneity of schooling results in a lower return to schooling ignoring birth cohort effects results in a lower return to work experience

myopic policies for some inventory models with uncertain demand distributions the majority of papers on stochastic inventory theory make the assumption that the distribution of consumer demand in each time period is known with certainty while this assumption is unsupported in many applied contexts it is conventionally held that more realistic models are more difficult to solve and will not yield simple operational policies this paper shows that a simple inventory policy based upon a critical fractile can be optimal or near optimal in some inventory models with parameter adaptive demand processes in these some parameter of the demand distribution is not known with certainty and estimates of the parameter are updated in a statistical fashion as demand is observed through time examples include exponentially smoothed forecasts and bayesian updating of parameter estimates bounds on the value loss relative to optimal cost when using the critical fractile policy can be calculated directly from the problem data some numerical examples illustrate the technique

life expectancy human capital social security and growth we analyze the effects of changes in the mortality rate upon life expectancy education retirement age human capital and growth in the presence of social security we build a vintage growth overlapping generations model in which individuals choose the length of education and the age of retirement and where unfunded social security pensions depend on workers past contributions social security has a positive effect on education but pension benefits favor reductions in retirement age the net effect is that starting from a benchmark case higher life expectancies give rise to lower per capita gdp growth in the presence of social security as the share of the active population is reduced in addition higher social security contribution rates reduce the growth rate of per capita gdp

antidumping decisions and macroeconomic variables in the usa this paper investigates the macroeconomic factors that explain antidumping decisions in the us international trade commission johansen s cointegration test results show that there is a long run equilibrium relationship between growth of the percentage of affirmative antidumping decisions and trade balance the error correction model shows that there is a causality running from the latter to the former growth of the percentage of affirmative antidumping decisions is revealed to cause slowdown in economic growth partisan characteristics are observed in the commissioners antidumping decisions

multi period inventory games with information update this paper addresses the multi period inventory game of two substitutable products with learning in which the demand distribution form in each period is known but one or more parameters are unknown in advance the retailers update the estimates of the unknown parameters using the historical demand information as the transaction proceeds at each period the retailers check the initial inventories and update the forecasts about their demands first then they place the orders which are delivered immediately finally the demands are realized and satisfied by the available inventories the unsatisfied demand of one retailer switches to another and is satisfied by the other s left inventory unsatisfied demand is lost and the excess inventories incur a holding cost all the information is common knowledge the objectives of the two retailers are to make proper ordering decisions to maximize their total expected discount profits respectively we model the problem as a dynamic bayesian game with multi dimension state space we give the conditions under which the state space can be reduced we prove the existence and uniqueness of nash equilibrium and show that the equilibrium ordering strategy is the base stock policy the computation of the base stock levels can be reduced to a game with one dimension state space moreover for the case with perishable product the computation of the base stock levels can be reduced to the newsboy game

welfare effects on the marital decisions of never married mothers the economic theory of marriage suggests that more generous welfare benefits should serve to reduce the probability of marriage among mothers who have given birth out of wedlock this relationship is explored using data on never married mothers in the national longitudinal survey of youth only very limited evidence indicates that higher welfare payments lower the probability of marriage for nonblack never married mothers for black never married mothers the results suggest that higher benefits are associated with higher marriage rates