the impact of the 1992 cable act on household demand and welfare i measure the benefit to households of the 1992 cable act in light of strategic responses by cable systems to the regulations mandated by the act a discrete choice differentiatedproduct model of household demand for all offered cable television services forms the basis of the analysis aggregation over households and service combinations to the level of the data permits estimation on a cross section of cable markets from before and after the act the results indicate that while the regulations mandated price reductions of 10 17 for cable services observed system responses yielded no change in household welfare post act changes in cable prices are responsible for most of the difference

assortative matching and reputation in the market for first issues using a tractable structural model of the matching equilibrium between underwriters and equity issuing firms we study the determinants of value in underwriter firm relationships our estimates imp

structural workshop paper discrete choice models of consumer demand in marketing marketing researchers have used models of consumer demand to forecast future sales to describe and test theories of behavior and to measure the response to marketing interventions the basic framework typically starts from microfoundations of expected utility theory to obtain an econometric system that describes consumers choices over available options and to thus characterize product demand the basic framework has been augmented significantly to account for quantity choices to accommodate purchases of several products on a single purchase occasion multiple discreteness and multicategory purchases and to allow for asymmetric switching between brands across different price tiers these extensions have enabled researchers to bring the analysis to bear on several related marketing phenomena of interest this paper has three main objectives the first objective is to articulate the main goals of demand analysis forecasting measurement and testing and to highlight several considerations associated with these goals our second objective is to describe the main building blocks of individual level demand models we discuss approaches built on direct and indirect utility specifications of demand systems and we review extensions that have appeared in the marketing literature the third objective is to explore a few emerging directions in demand analysis including considering demand side dynamics combining purchase data with primary information and using semiparametric and nonparametric approaches we hope researchers new to this literature will take away a broader perspective on these models and see the potential for new directions in future research

job tenure and joblessness of displaced workers selective search where unemployed job losers confine their job seeking efforts to matches in the pre separation sector has attracted considerable attention as a possible source of high and persistent unemployment however this idea is questionable

endogeneity in brand choice models applications of random utility models to scanner data have been widely presented in marketing for the last 20 years one particular problem with these applications is that they have ignored possible correlations between the independent variables in the deterministic component of utility price promotion etc and the stochastic component or error term in fact marketing mix variables such as price not only affect brand purchasing probabilities but are themselves endogenously set by marketing managers this work tests whether these endogeneity problems are important enough to warrant consideration when estimating random utility models with scanner panel data our results show that not accounting for endogeneity may result in a substantial bias in the parameter estimates

invited paper even the rich can make themselves poor a critical examination of iv methods in marketing applications marketing is a field that is rich in data our data is of high quality often at a highly disaggregate level and there is considerable variation in the key variables for which estimates of effects on outcomes such as sales and profits are desired the recognition that in some general sense marketing variables are set by firms on the basis of information not always observable by the researcher has led to concerns regarding endogeneity and widespread pressure to implement instrumental variables methods in marketing problems the instruments used in our empirical literature are rarely valid and the iv methods used can have poor sampling properties including substantial finite sample bias and large sampling errors given the problems with iv methods a convincing argument must be made that there is a first order endogeneity problem and that we have strong and valid instruments before these methods should be used if strong and valid instruments are not available then researchers need to look toward supplementing the information available to them for example if there are concerns about unobservable advertising or promotional variables then the researcher is much better off measuring these variables rather than using instruments such as lagged marketing variables that are clearly invalid ultimately only randomized variation in marketing variables with proper implementation and large samples can be argued to be a valid instrument without further assumptions

high compensation creates a ratchet effect consider a firm which pays a credit constrained worker for his effort over two periods the more the firm pays in one period the wealthier is the worker in the following period and so the more he must then be paid for a given effort we describe the profit maximising contract under these conditions showing how this wealth ratchet effect can raise wages over time and cause the firm to fire older workers

distributional preferences and the incidence of costs and benefits in climate change policy we explore the relationship between willingness to pay wtp for climate change mitigation and distributional preferences by which we mean individuals opinions about who should be responsible for climate change prevention and whether the share of climate change impacts borne by the poor is a cause for concern we use 1 770 responses to an online stated preference survey the domestic costs in our survey s policy choice scenarios are expressed as a set of randomized shares across four different payment vehicles and the international cost shares are randomized across four groups of countries we also elicit respondents perceptions of the likely regressivity of climate change impacts under a policy of business as usual wtp is higher when larger cost shares are borne by parties deemed to bear a greater responsibility for mitigation and when respondents believe and care that the impacts of climate change may be borne disproportionately by the world s poor that wtp for an environmental policy depends on the distributional consequences of the policy is an unsettling result efficiency assessments are typically assumed to be separate from equity considerations in most benefit cost analyses

search with learning for differentiated products evidence from e commerce this article provides a method to estimate search costs in a differentiated product environment in which consumers are uncertain about the utility distribution consumers learn about the utility distribution by bayesian updating their dirichlet process prior beliefs the model provides expressions for bounds on the search costs that can rationalize observed search and purchasing behavior using individual specific data on web browsing and purchasing behavior for mp3 players sold online we show how to use these bounds to estimate search costs as well as the parameters of the utility distribution our estimates indicate that search costs are sizable we show that ignoring consumer learning while searching can lead to severely biased search cost and elasticity estimates

addressing endogeneity in aggregate logit models with time varying parameters for optimal retail pricing abstract it is well known that price endogeneity is a severe problem in demand models for market level data e g aggregate logit models because it leads to biased estimates and therefore incorrect managerial implications if the price parameter varies over time as is usually the case the relevance of the issue increases because standard methods to correct endogeneity biases e g generalized method of moments fail this paper presents a control function approach as a remedy a comprehensive simulation study demonstrates this method s suitability such that addressing endogeneity with the control function approach is the best choice moreover addressing the endogeneity problem incorrectly may be even more harmful than simply ignoring it to further illustrate the control function approach we analyze the demand for canned tuna using aggregate retailer level data here all utility parameters vary over time and price endogeneity is indeed an issue effectively addressing price endogeneity correct has positive economic consequences a normative model analysis reveals that implementing the control function approach yields a 3 increase in retailer profits

the relevance of attitudinal factors for the acceptance of energy policy measures a micro econometric analysis abstract this paper empirically examines the individual support of the german energy transition in total and especially of six single energy policy measures which are components of the energy transition our micro econometric analysis with binary and ordered probit models on the basis of data from a broad survey of citizens reveals the important role of several attitudinal factors with respect to our indicators for perceived personal costs of the energy transition the estimation results point to a weak evidence for economic self interest due to some negative correlations between expected energy price increases due to the energy transition and the support of single energy policy measures interestingly however the concern that the energy transition alone causes strong energy price increases is not shared by the majority of the respondents the estimation results also suggest that the support of several energy policy measures is strongly correlated with environmental values however the most important attitudinal factor is obviously political identification the econometric analysis suggests that an overall left green policy identification is positively correlated with the support of the energy transition in total and an identification with ecological policy is positively correlated with the acceptance of several single energy policy measures the econometric analysis especially supports the more sophisticated categorization of political orientation since for example a liberal conservative policy orientation is not significantly correlated with the support of the energy transition in total

is fairness blind the effect of framing on preferences for effort sharing rules this paper uses a choice experiment to study citizens preferences for effort sharing rules for reducing carbon dioxide emissions for a given global cost and level of emission reduction we study the willingness to pay for various rules that imply different distributions of the cost between eu the us china and africa the focus of this paper is on the use of two different treatments one where the respondents were informed about the country or country group names and one where the names were replaced with anonymous labels a d this allows us to test whether people s preferences for effort sharing rules depend on the framing of the problem we find that the ranking of the rules and the strength of the preferences are not significantly different between the two treatments and hence we find no evidence of ingroup bias in preferences for effort sharing rules c 2011 elsevier b v all rights reserved less

organizational debut on the public stage marketing myopia and initial public offerings successful initial public offerings ipos provide firms with access to valuable resources but also put pressure on firms to impress potential investors with evidence of their current well being and prospects for future growth to impress investors ipo firms might curtail their marketing budgets which appears to inflate current earnings and provide evidence of current well being however curtailing marketing budgets unexpectedly during an ipo may be a myopic practice in that the immediate benefits of these budget cuts are offset by their longer term adverse consequences on financial well being the extent of these adverse consequences in turn may be moderated by external firm factors including strategic alliances and key customer relationships and internal firm factors such as the strategic emphasis on value creation versus value appropriation a sample of 1 095 ipos during 2000 2011 reveals evidence of myopic marketing practices in more than 37 of the sample investors seem misled during ipos bu

the ratchet effect and the market for secondhand workers workers in a long term relationship often have an incentive to hide their ability early in the relationship to avoid having the firm increase the level of output expected from them in the future we show that competition for older workers will permit the implementation of efficient piece rate contracts when the difficulty of the job is unobserved by the firm gibbons 1987 has shown that all piece rate contracts will be inefficient together these results may explain why piece rates are common in some jobs such as agricultural work and sales and not as popular for many manufacturing jobs

optimal incentive contracts in the presence of career concerns theory and evidence this paper studies optimal incentive contracts when workers have career concerns concerns about the effects of current performance on future compensation we show that the optimal compensation contract optimizes total incentives the combination of the implicit incentives from career concerns and the explicit incentives from the compensation contract thus the explicit incentives from the optimal compensation contract should be strongest for workers close to retirement because career concerns are weakest for these workers we find empirical support for this prediction in the relation between chief executive compensation and stock market performance

how and when to use the political cycle to identify advertising effects this paper provides a critical analysis of how and when political advertising serves as a useful source of exogenous variation in product advertising

forecasting marketing mix responsiveness for new products abstract before a new product launch marketers need to infer how demand will respond to various levels of marketing mix variables to set an appropriate marketing plan a critical challenge in estimating marketing mix responsiveness from historical data is that the observed decisions were affected by private information possessed by managers about the heterogeneous effects of marketing mix variables on sales the authors refer to this as the slope endogeneity problem such endogeneity differs from the intercept endogeneity problem which has been widely acknowledged in the literature to correct for the slope endogeneity bias the authors develop a conceptually simple control function approach that is amenable to multiple endogenous variables and marketing mix carryover effects the method is applied to forecasting advertising responsiveness in the u s dvd market the results suggest that advertising responsiveness varies substantially across dvd titles and that estimated marketing mix elasticities w

measuring market power in the ready to eat cereal industry the ready to eat cereal industry is characterized by high concentration high price cost margins large advertising to sales ratios and numerous introductions of new products previous researchers have concluded that the ready to eat cereal industry is a classic example of an industry with nearly collusive pricing behavior and intense nonprice competition this paper empirically examines this conclusion in particular i estimate price cost margins but more importantly i am able empirically to separate these margins into three sources i that which is due to product differentiation ii that which is due to multi product firm pricing and iii that due to potential price collusion the results suggest that given the demand for different brands of cereal the first two effects explain most of the observed price cost margins i conclude that prices in the industry are consistent with noncollusive pricing behavior despite the high price cost margins leading firms are able to maintain a portfolio of differentiated products and influence the perceived product quality it is these two factors that lead to high price cost margins

state dependence and alternative explanations for consumer inertia for many consumer packaged goods products researchers have documented inertia in brand choice a form of persistence whereby consumers have a higher probability of choosing a product that they have purchased in the past using data on margarine and refrigerated orange juice purchases we show that the finding of inertia is robust to flexible controls for preference heterogeneity and not due to autocorrelated taste shocks thus the inertia is at least partly due to structural not spurious state dependence we explore three economic explanations for the observed structural state dependence preference changes due to past purchases or consumption experiences which induce a form of loyalty search and learning our data are consistent with loyalty but not with search or learning properly distinguishing among the dierent sources of inertia is important for policy analysis because the alternative sources of inertia imply qualitative dierences in firm s pricing incentives and lead to quantitatively dierent equilibrium

differential mortality and wealth accumulation the issue of asset accumulation and decumulation is central to the life cycle theory of consumer behavior and to many policy questions one of the main implications of the life cycle model is that assets are decumulated in the last part of life most empirical studies in this area use cross sectional data of estimate mean or median wealth age profiles the use of cross sections to estimate the age profile of assets is full of pitfalls for example if wealth and mortality are related in that poorer individuals die younger one overestimates the last part of the wealth age profile when using cross sectional data because means or other measures of location are taken over a population which becomes richer as it ages this paper examines the effect of differential mortality on cross sectional estimates of wealth age profiles our approach is to quantify the dependence of mortality rates on wealth and use these estimates to correct wealth age profiles for sample selection due to differential mortality we estimate mortality rates as a function of wealth and age for a sample of married couples drawn from the survey of income and program participation sipp our results show that accounting for differential mortality produces wealth profiles with significantly more dissaving among the elderly

piece rate incentive schemes this paper uses recent results from incentive theory to study heretofore informal critiques of piece rate compensation schemes the informal critiques are based on the history of failed attempts to install piece rate compensation schemes at the turn of the century the formal analysis emphasizes the importance of information and commitment in contracting the main result is as follows in a work environment characterized by hidden information and a hidden action if neither the firm nor the worker can commit to future behavior then no compensation scheme piece rate or otherwise can induce the worker not to restrict output

are wages habit forming evidence from micro data although utility functions play a central role in economics the axiom that utility depends only on the absolute levels of its arguments is rarely tested this paper uses panel data on 2000 british employees who remain with the same employer and who are not promoted from one wave to the next it is shown that one important measure of well being overall job satisfaction is strongly positively correlated with the change in the worker s pay between waves but is unrelated to the current level of pay empirical tests suggest that a reference dependent satisfaction function where individual well being depends on current pay relative to past pay is more consistent with these regression results than are productivity or agency explanations of increasing wage profiles some evidence is presented of greater job satisfaction effects of pay rises for lower paid less well educated and younger workers these results provide some micro evidence consistent with the theory widespread in social science of habituation individuals may become used to any given level of consumption or income as such they tie in with the finding that a country s well being as measured by the average happiness of its citizens is only weakly correlated with its per capita gnp

international equity and differentiation in global warming policy ne of the major obstacles to reaching a comprehensive agreement on global warming is the setting of greenhouse gas emission reduction targets for individual countries long standing tensions between industrialized and developing countries have raised the issue of equity in burden sharing moreover individual industrialized nations have pleaded special circumstances and have sought differentiation in their obligations this paper analyzes alternative rules for distributing tradable carbon dioxide emissions permits a non linear programming model which distinguishes between allocation based and outcome based rules is used to analyze the relative welfare outcomes the model is applied to the world body of nations and yields several important policy implications

worker reputation and productivity incentives this paper examines firms problem of how to motivate risk averse workers not to shirk when workers utility functions are unknown the problem is studied in a 2 period setting in which a worker s actions today can influence not only his compensation today but the firms beliefs about his preferences firms cannot credibly commit to ignore the revealed information so workers actions today affect their future compensation contracts it is shown that in the wilson miyazaki equilibrium firms may pool workers and learn about their types gradually over time rather than inducing them to separate and reveal their types immediately

limit theorems for estimating the parameters of differentiated product demand systems we provide an asymptotic distribution theory for a class of generalized method of moments estimators that arise in the study of dierentiated product markets when the number of observations is associated with the number of products within a given market we allow for three sources of error sampling error in estimating market shares simulation error in approximating the shares predicted by the model and the underlying model error it is shown that the estimators are can provided the size of the consumer sample and the number of simulation draws grow at a large enough rate relative to the number of products we consider the implications of the results for berry levinsohn and pakes 1995 random coecient logit model and the pure characteristic model analyzed in berry and pakes 2002 the required rates dier for these two frequently used demand models a small monte carlo study shows that the dierence in asymptotic properties of the two models are reflected in quite a striking way in the models small sample properties moreover the limit distributions provide a good approximation to the actual monte carlo distribution of the parameter estimates the results have important implications for the computational burden of the two models

short term contracts and long term agency relationships abstract long term contracts are valuable only if optimal contracting requires commitment to a plan today that would not otherwise be adopted tomorrow we show that commitments are unnecessary and hence short term contracts are sufficient if 1 all public information can be used in contracting 2 the agent can acess a bank on equal terms with the principal 3 recontracting takes place with common knowledge about technology and preferences and 4 the frontier of expected utility payoffs generated by the set of incentive compatible contracts is downward sloping at all times

salaries and piece rates compensation can take many forms remuneration can come as pecuniary payments as fringes such as health and pension benefits or as a nonpecuniary reward such as plush office furniture that costs the firm less than it benefits the worker a significant literature has examined the trade offs between pecuniary and nonpecuniary compensation the modern work having been pioneered by rosen 1974 more recently another body of literature has examined the selection of method of total compensation ignoring the distinction between pecuniary and nonpecuniary payment this work has focused on risk and incentive factors it has resulted in comparisons of compensation based on absolute output levels to that based on relative performance it has also led to explorations of the relation of compensation to experience over the work life 2 little attention has been paid to what may be among the most important and obvious distinction in methods of compensation namely the choice between a fixed salary for some period of time that is paying on the basis of input and some workers receive compensation that is specified in advance and not directly contingent on performance instead it depends on an input measure such as hours worked for others compensation is directly related to output this essay is an attempt to predict a firm s choice of compensation method piece rates are defined more rigorously among the more important factors discussed are worker heterogeneity incentives sorting considerations monitoring costs and asymmetric information one result is that salary workers tend to be of lower quality and more homogeneous than are their piece rate counterparts numerous additional results are provided helpful comments by victoria lazear and yoram weiss are gratefully acknowledged support was provided by the department of labor and the national science foundation 1 see lazear and rosen 1981 stiglitz 1981 holmstrom 1982 green and stokey 1983 2 see lazear 1979 1981 and harris and holmstrom in press

popular support for climate change mitigation evidence from a general population mail survey using a sample of 1 651 us households we explore some determinants of willingness to pay wtp for climate change mitigation programs our mail survey had a relatively low response rate so we first use several additional data sources to build a detailed sample selection model this model uses features of the survey instrument measures of geographic vulnerability to climate change seasonality the political mix in the county attributes of the address or addressee and a set of factor scores from an extensive factor analysis of all census tracts in the us we estimate this model jointly with a model to explain climate policy preferences as a function of the domestic and international distribution of policy costs as well as the climate change impacts that each respondent believes will occur under a policy of business as usual despite statistically significant patterns of nonresponse selectivity effects are minimal in this case wtp for climate change mitigation is greater when the domestic incidence of mitigation costs is borne mostly through higher energy taxes it is also greater when costs are understood to be shared internationally with other groups of countries rather than being borne mostly by a country group including the us people are generally more willing to pay for climate change mitigation if they believe that the harm caused by climate change impacts will be substantial rather than just moderate

seniority wages and productivity a turbulent decade why does a worker s wage tend to grow with seniority in the firm and what does this have to do with productivity two decades ago neoclassical labor economists thought that the theory of human capital provided a good answer to this question the last decade has however been one of puzzles and doubt at this point few would give an unambiguous answer and much hinges on the answer an attractive feature of human capital theory is that it yields a consistent and coherent explanation for several aspects of the employer employee relationship for example seniority systems layoff policies that vary with skill and the relationship between tenure and turnover can be explained in terms of human capital the fact that these explanations are connected leads however to something like a domino effect doubts about one cast doubt on the others if the human capital explanation for the wage seniority relationship is flawed then human capital explanations for other phenomena may require reevaluation in addition an important body of empirical research is built around the assumption that at any point in time a person s wage indicates the person s productivity included here is the extensive literature on the human capital earnings function as well as work on labor demand market discrimination and compensating differentials that assumption has become controversial in recent years in part because implicit contract theories predict that compensation will be redistributed over the period of the contract if a person s spot wage has little to do with spot productivity but rather is an instrument of a complex insurance or deferred compensation scheme then a reassessment of the empirical research may be necessary

beyond the endogeneity bias the effect of unmeasured brand characteristics on household level brand choice models we investigate the role of potential weekly brand specific characteristics that influence consumer choices but are unobserved or unmeasurable by the researcher we use an empirical approach based on the estimation methods used for standard random coefficients logit models to account for the presence of such unobserved attributes using household scanner panel data we find evidence that ignoring such time varying latent to the researcher characteristics can lead to two types of problems first consistent with previous literature we find that these unobserved characteristics may lead to biased estimates of the mean price response parameters this argument is based on a form of price endogeneity if marketing managers set prices based on consumer willingness to pay then the observed prices will likely be correlated with the latent to the researcher brand characteristics we resolve this problem by using an instrumental variables procedure our findings suggest that simply ignoring these attributes may also lead to larger estimates of the variance in the heterogeneity distribution of preferences and price sensitivities across households this could overstate the benefits from marketing activities such as household level targeting we resolve the problem by using weekly brand intercepts embedded in a random coefficients brand choice model to control for weekly brand specific characteristics while accounting for household heterogeneity overall our results extend the finding on the endogeneity bias from the mean of the heterogeneity distribution i e the price effect to include the variance of that distribution

ask your doctor direct to consumer advertising of pharmaceuticals we measure the impact of direct to consumer television advertising dtca by drug manufacturers our identification strategy exploits shocks to local advertising markets generated by the political advertising cycle and a regulatory intervention affecting a single product we find evidence of significant business stealing effects among branded advertised drugs in addition we show positive spillovers from drug advertisements to non advertised competitors in the same class we decompose the effect and show it is primarily due to new customers finally we provide evidence that dtca is cost effective from a societal standpoint in our setting

perceptions on equity and responsibility in coastal zone policies this paper studies public perceptions of fairness in managed retreat policies we try to empirically test the acceptance of the following four principles of fairness efficiency need responsibility and priority to property rights using responses from a questionnaire the objective of the paper is to generate information on the issue of solidarity between people exposed to the risk of climate change induced flooding and those who are not as regards to funding managed retreat policies and damage compensation to that end two population zones coastal and hinterland were surveyed in order to characterise personal preferences of stakeholders and distributive preferences of third parties results show i a support for national solidarity in the funding of managed retreat policies ii a difference in people ssupport for the responsibility principle depending on whether it is embedded in a general principle of justice or in a particular compensation scheme and iii a difference between distributional judgments of the coastal inhabitants stakeholders and those of the hinterland third parties according to the choices of the funding principles of damages on private assets and the choices of the general principles of fairness in managed retreat policies

on self interested preferences for burden sharing rules an econometric analysis for the costs of energy policy measures abstract this paper examines the acceptance of burden sharing rules that refer to the costs of the german energy transition which is one of the most challenging and disputed national climate and energy policy measures based on data from a comprehensive survey of more than 2200 citizens the empirical analysis reveals that the polluter pays rule has by far the highest support compared with the ability to pay rule and especially compared with the equal pay rule which is widely refused in the sample since the distribution of the costs of the german energy transition is largely in line with a polluter pays rule its strong support seems to contribute to the high acceptance of the energy transition at all the main result of our econometric analysis with multivariate binary and ordered probit models is that not only some attitudinal factors like environmental values and political identification but especially economic self interest is relevant since equivalent energy expenditures have a significantly negative effect on the support of the polluter pays rule and especially equivalent income has a significantly negative effect on the preference for the ability to pay rule these results suggest that the use of distributional arguments for the criticism of energy policy measures is not necessarily value driven on the basis of real perceptions of distributive justice but can also be strategically motivated to prevent and combat economically unfavorable measures together with the strong general support of the polluter pays rule these results suggest that a sharp reorientation of the german energy transition due to distributional arguments is not very useful

long term short term and renegotiation on the value of commitment in contracting spot contracting generally involves efficiency losses relative to long term contracting it is proved here that short term contracting and renegotiation allow to achieve long run efficiency when transfers are not limited objectives are conflicting and no relevant asymmetric information appears at recontracting dates this last assumption excludes adverse selection but not moral hazard when technologies and preferences are time separable copyright 1990 by the econometric society

a control function approach to endogeneity in consumer choice models abstract endogeneity arises for numerous reasons in models of consumer choice it leads to inconsistency with standard estimation methods that maintain independence between the model s error and the included variables the authors describe a control function approach for handling endogeneity in choice models observed variables and economic theory are used to derive controls for the dependence between the endogenous variable and the demand error the theory points to the relationships that contain information on the unobserved demand factor such as the pricing equation and the advertising equation the authors approach is an alternative to berry levinsohn and pakes s 1995 product market controls for unobserved quality the authors apply both methods to examine households choices among television options including basic and premium cable packages in which unobserved attributes such as quality of programming are expected to be correlated with price without correcting for endogeneity aggregate d

endogeneity in semiparametric binary response models this paper develops and implements semiparametric methods for estimating binary response binary choice models with continuous endogenous regressors it extends existing results on semiparametric estimation in single index binary response models to the case of endogenous regressors it develops a control function approach to account for endogeneity in triangular and fully simulataneous binary response models the proposed estimation method is applied to estimate the income effect in a labor market participation problem using a large micro data set from the british fes the semiparametric estimator is found to perform well detecting a significant attenuation bias the proposed estimator is contrasted to the corresponding probit and linear probability specifications jel c14 c25 c35 j22

endogeneity and individual consumer choice abstract in many markets there is likely to be correlation both across periods in terms of the choices of one consumer and across consumers in terms of their choices in each period the former is caused by consumer heterogeneity and the latter may be the result of demand common shocks across consumers furthermore if firms partially observe these common shocks their market decisions may end up being endogenous and correlated with the common shocks because researchers cannot typically fully observe consumer heterogeneity and the common shocks the estimation method must account for the endogeneity of firms decisions in this article the authors present a test for endogeneity under unobserved consumer heterogeneity and common shocks which is based on a quasi likelihood estimation method to estimate the model parameters consistently when endogenous firm behavior unobserved heterogeneity and common shocks are present the test examines the differences in general method of moments coefficient estima

models for heterogeneous variable selection abstract preference heterogeneity is a major research stream in marketing aimed at quantifying and understanding the diversity of demand for product attributes and attribute levels in experimental settings in which consumers are presented with simple descriptions of product offerings continuous distributions of heterogeneity such as the multivariate normal provide a useful representation of preference however in more complex cases in which respondents have value for only a few of the benefits associated with an offering or cognitive constraints that result in selective attention to a subset of the information available continuous distributions of heterogeneity do not reflect the possibility that a subset of the variables has nonzero effect sizes for different respondents identifying which attributes are used in a brand choice decision is closely related to the statistical procedure of variable selection this article extends variable selection methods to accommodate heterogeneity across consumers

recreation demand models with taste differences over people we estimate random parameter logit models of anglers choice of fishing site the models generalize logit by allowing coefficients to vary randomly over anglers rather than being fixed the models do not exhibit the restrictive independence from irrelevant alternatives property of logit and can represent any substitution pattern estimation explicitly accounts for the fact that the variation in coefficients over anglers induces correlation in unobserved utility over trips by the same angler willingness to pay for improved fish stock and the value to anglers of specific sites are calculated from the models and compared with the estimates obtained from a standard logit model

an exogeneity test for a simultaneous equation tobit model with an application to labor supply a test of weak exogeneity in the simultaneous equation tobit model is proposed and illustrated using a female labour supply model estimated using cross section data the test statistic can be simply output from any standard tobit maximum likelihood package and is asymptotically efficient the procedure provides consistent estimators for the simultaneous tobit model whose asymptotic covariance matrix is a simple extension of the usual tobit formula we also provide the lagrange multiplier test of weak exogeneity this abstract was borrowed from another version of this item

first mover advantage through distribution a decomposition approach whereas the extant literature on entry order effects establishes that first entrants often earn higher market shares market share advantage the literature on distribution suggests that increased distribution has a positive effect on sales can distribution help us better understand entry order effects on market shares this paper examines how the first entrant in a geographical market achieves a market share advantage through distribution for this purpose i propose a simple method of decomposing sales into physical distribution and sales performance the data come from a manually collected panel on six major japanese convenience store chains from 47 geographical markets between 1991 and 2007 using an instrumental variable approach to address the potential endogeneity of entry order i find first entrants have a positive market share advantage over later entrants specifically the physical distribution measured by the number of outlets in a market drives most of the advantage meanwhile the pos