the strategic implications of scale in choice based conjoint analysis choice based conjoint cbc studies have begun to rely on simulators to forecast equilibrium prices for pricing strategic product positioning and patent copyright valuations whereas cbc research

markets in equilibrium with firms out of equilibrium a simulation study abstract we explore the effect of the limited ability to process information on the convergence of firms toward equilibrium in the context of a cournot oligopoly with a unique and symmetric nash equilibrium firms are modeled as adaptive economic agents through a genetic algorithm computational experiments show that while market production is close to equilibrium firm production is relatively far from the individual equilibrium level this pattern of firm heterogeneity is not an artifact of random elements built into the decisional process instead it comes from the market interaction of firms with cognitive limitations

incentive aligned conjoint analysis abstract because most conjoint studies are conducted in hypothetical situations with no consumption consequences for the participants the extent to which the studies are able to uncover true consumer preference structures is questionable experimental economics literature with its emphasis on incentive alignment and hypothetical bias suggests that more realistic incentive aligned studies result in stronger out of sample predictive performance of actual purchase behaviors and provide better estimates of consumer preference structures than do hypothetical studies to test this hypothesis the authors design an experiment with conventional hypothetical conditions and parallel incentive aligned counterparts using chinese dinner specials as the context the authors conduct a field experiment in a chinese restaurant during dinnertime the results provide strong evidence in favor of incentive aligned choice conjoint analysis in that incentive aligned choice conjoint outperforms hypothetical choice conjo

identifying the free riders a simple algorithm for determining who will contribute to a public good abstract when a heterogeneous group of people provide themselves with a pure public good the resulting nash equilibrium outcome will divide the group into contributors and free riders this paper proposes a general algorithm for discovering which individuals in the group fall into which of these two classes the algorithm is based on identifying for each individual how much of the public good must be provided by others to drive that individual s contribution to zero

a reservation price model for optimal pricing of multiattribute products in conjoint analysis a significant application of conjoint analysis is in pricing decisions for new products conceptually profit maximization is an important criterion for selecting the price of a product however t

early mortality declines at the dawn of modern growth we explore the hypothesis that demographic changes which began in the seventeenth and eighteenth centuries are at the root of the acceleration in growth rates at the dawn of the modern age during this period life tables for geneva and venice show a decline in adult mortality french marriage registers reveal an important increase in literacy historians measure an acceleration of economic growth we develop an endogenous growth model with a realistic survival law in which rising longevity increases individual incentives to invest in education and fosters growth we quantitatively estimate that the observed improvements in adult mortality account for 70 of the growth acceleration in the pre industrial age

why do only the g7 2 countries among united nations members discuss about international public goods a simulation study abstractthis article investigates why only the group of 7 plus china and russia g7 2 countries among 194 united nations members discuss about international public goods by simulating the heterogeneity of income prices and preference parameters on the total provisions and the number of free riders we find that the number of contributors for international public goods is 15 under the 194 member countries while the others are free riders in addition the contributors are the top 15 powerful countries with largest dropout value over the world then the discussion with only 15 countries for public goods is meaningful as large as the heterogeneity of parameters is the number of contributors becomes closer to g7 2

malthus in sweden this paper presents some new and unique cross county data from 19th century sweden over birth death and marriage rates grain prices and harvests local grain prices correlate negatively with local harvests suggesting imperfectly integrated food markets the so called positive and preventive checks are also present good local harvests are associated with high birth and marriage rates and low death rates we also find that the fertility and marriage effects from changes in prices but not harvests are greater in counties that rely more on manufacturing consistent with an open economy model of fertility choice where agents earn income from both agriculture and manufacturing

are results from non hypothetical choice based conjoint analyses and non hypothetical recoded ranking conjoint analyses similar conflicting findings have been found in previous research that compared choice based conjoint analysis and ranking conjoint analysis in a public good setting the present paper revisits this issue for a private good in a non hypothetical context using small and large choice sets our results suggest that in a small choice set setting participants preferences and willingness to pay are similar across the two conjoint analysis formats however in large choice sets a divergence between the two conjoint analysis formats emerges hence the two conjoint analysis formats can only be used interchangeably in small choice sets not in large choice sets

an incentive compatible conjoint ranking mechanism a simple method for making ranking based conjoint analysis incentive compatible is proposed the incentive compatible mechanism involves people purchasing a product profile with a probability proportional to its assigned rank in an empirical application related to consumer preferences for beef attributes we find that the forecasted market share for a new pasture raised steak obtained using incentive compatible rankings was significantly greater than that implied from traditional hypothetical conjoint rankings people s rankings of ground beef products were not affected by the mechanism or by information about pasture raised beef copyright 2008 oxford university press

the child is father of the man implications for the demographic transition we propose a new theory of the demographic transition based on the evidence from natural sciences that physical development during childhood affects adult life expectancy positively this theory is embodied in a continuous time olg framework where fertility longevity and education all result from individual decisions we conclude that a sustained improvement in physical development is at the basis of the observed demographic transition in today s developed countries and may be an important factor in explaining the slow transition from the malthusian towards the modern era the dynamics of the proposed model reproduce the key features of the demographic transition including sustained improvements in child physical development permanent increase in life expectancy a hump shaped evolution of both population growth and fertility and late increases in secondary educational attainments

uniqueness of nash equilibrium in private provision of public goods an improved proof our 1986 paper private provision of public goods presents a theorem on the uniqueness of nash equilibrium in the private provision of public goods richard hirth of the university of pennsylvania and clive fraser of warwick have independently suggested that although our theorem is correct our proof is incorrect each writer proposes an alternative method of proof for the theorem with characteristic charity to our own deficiencies we prefer to view our earlier proof as unduly opaque rather than wrong whichever view one takes a more transparent proof is called for the proof presented here follows the same outline as our 1986 proof but explains a step of the argument that was far from obvious in the original proof this proof uses the notation of the 1986 paper and refers to facts that are proved there

mortality decline human capital investment and economic growth abstract we examine the role of increased life expectancy in raising human capital investment during the process of economic growth we develop a continuous time overlapping generations model in which individuals make optimal schooling investment choices in the face of a constant probability of death we present analytic results followed by results from a calibrated version of the model using realistic estimates of the return to schooling mortality decline produces economically significant increases in schooling and consumption allowing schooling to vary endogenously produces a much larger response of consumption and capital to mortality decline than is observed when schooling is held fixed

from malthus to modern growth can epidemics explain the three regimes we model demographic and economic long run development in a setting where mortality is endogenous and subject to epidemic shocks the model replicates the full transition from malthusian stagnation to modern growth consistent with the historical facts the economy also passes an intermediate post malthusian phase where growth rates of both population and per capita income increase simultaneously as mortality rates fall and become less volatile the escape from the malthusian trap is the result of a series of mild epidemic shocks making it inevitable at some stage but its timing random calibrations show that it can differ by thousands of generations absent differences in exogenous parameters

measuring consumers willingness to pay at the point of purchase abstract economists psychologists and marketing researchers rely on measures of consumers willingness to pay wtp in estimating demand for private and public goods and in designing optimal price schedules existing market research techniques for measuring wtp differ in whether they provide an incentive to consumers to reveal their true wtp and in whether they simulate actual point of purchase contexts the authors present an empirical comparison of several procedures for eliciting wtp that are applicable directly at the point of purchase in particular the authors test the applicability of becker degroot and marschak s 1964 well known incentive compatible procedure for assessing the utility of lotteries to measuring consumers wtp in three studies the authors explore the reliability validity and feasibility of the procedure and show that it yields lower wtp estimates than do non incentive compatible methods such as open ended and double bounded contingent valuation they show experimentally t

early literacy achievements population density and the transition to modern growth the transition from economic stagnation to sustained growth is often modeled thanks to population induced productivity improvements which are assumed rather than derived from primary assumptions in this paper the effect of population on productivity is derived from optimal behavior more precisely both the number and location of education facilities are chosen optimally by municipalities individuals determine their education investment depending on the distance to the nearest school and also on technical progress and longevity in this setting higher population density enables the set up costs of additional schools to be covered opening the possibility to reach higher educational levels using counterfactual experiments we find that one third of the rise in literacy can be directly attributed to the effect of density and one sixth is linked to higher longevity moreover the effect of population density in the model is consistent with the available evidence for england where it is shown that schools were established at a high rate over the period 1540 1620

who are the members of the international club this article proposes pragmatic methods that incorporate recent contributions to public good theory to identify the members of the international club and how they select new members this article also suggests simple applications to the recent problems in international clubs such as the euro and nato

education lifetime labor supply and longevity improvements this paper presents an analysis of the differential role of mortality for the optimal schooling and retirement age when the accumulation of human capital follows the so called ben porath mechanism we set up a life cycle model of consumption and labor supply at the extensive margin that allows for endogenous human capital formation this paper makes two important contributions first we provide the conditions under which a decrease in mortality leads to a longer education period and an earlier retirement age second those conditions are decomposed into a ben porath mechanism and a lifetime human wealth effect vs the years to consume effect finally using us and swedish data for cohorts born between 1890 and 2000 we show that our model can match the empirical evidence

swedish economic growth and education since 1800 the contribution of this paper is twofold first it builds and makes use of long run data from sweden on formal education that have never been used to date second it provides a quantitative application of recent theoretical work on the link between demographic changes and economic growth through their effect on education it concludes that changes in longevity may account for as much as 20 of the observed rise in education over the period from 1800 2000 via a horizon effect but have little impact on income growth over the period on the contrary changes in population density and composition are central mainly thanks to their effect on productivity most income growth over this period would not have materialized if demographic variables had stayed constant since 1800

reality check combining choice experiments with market data to estimate the importance of product attributes discrete choice models estimated using hypothetical choices made in a survey setting i e choice experiments are widely used to estimate the importance of product attributes in order to make product design and marketing mix decisions choice experiments allow the researcher to estimate preferences for product features that do not yet exist in the market however parameters estimated from experimental data often show marked inconsistencies with those inferred from the market reducing their usefulness in forecasting and decision making we propose an approach for combining choice based conjoint data with individual level purchase data to produce estimates that are more consistent with the market unlike prior approaches for calibrating conjoint models so that they correctly predict aggregate market shares for a baseline market the proposed approach is designed to produce parameters that are more consistent with those that can be inferred from individual level market data the proposed method relies on a new general framework for combining two or more sources of individual level choice data to estimate a hierarchical discrete choice model past approaches to combining choice data assume that the population mean for the parameters is the same across both data sets and require that data sets are sampled from the same population in contrast we incorporate in the model individual characteristic variables and assert only that the mapping between individuals characteristics and their preferences is the same across the data sets this allows the model to be applied even if the sample of individuals observed in each data set is not representative of the population as a whole so long as appropriate product use variables are collected that can explain the systematic deviations between them the framework also explicitly incorporates a model for the individual characteristics which allows us to use bayesian missing data techniques to handle the situation where each data set contains different demographic variables this makes the method useful in practice for a wide range of existing market and conjoint data sets we apply the method to a set of conjoint and market data for minivan choice and find that the proposed method predicts holdout market choices better than a model estimated from conjoint data alone or a model that does not include demographic variables

to ban or not to ban foreign lobbying and cross national externalities this paper studies the costs and benefits of foreign lobbying we show how and when foreign lobbying can help internalize cross national externalities we argue that this is an often overlooked benefit of foreign lobbying we also study under what conditions a constitutional rule banning foreign lobbying is in the national interest of a country a key factor in this calculus is whether the interests of foreign lobby groups and domestic unorganized groups coincide or not we illustrate the logic with examples from trade policy and environmental regulation bannir ou ne pas bannir lobbying etranger et effets externes transnationaux ce texte etudie les couts et avantages du lobbying etranger on montre quand et comment que le lobbying etranger peut aider a internaliser des effets externes transnationaux on suggere que c est souvent un avantage qu on est porte a negliger du lobbying etranger on etudie sous quelles conditions une regle constitutionnelle bannissant le lobbying etranger peut etre dans l interet national d un pays un facteur cle dans ce calcul est le fait que les interets des groupes etrangers coincident ou non avec ceux des groupes nationaux non organises on illustre la logique sous jacente a l aide d exemples portant sur la politique commerciale et la reglementation environnementale

population technology and growth from malthusian stagnation to the demographic transition and beyond this paper develops a unied growth model that captures the historical evolution of population technology and output it encompasses theendogenous transitionbetween three regimes that have characterized economic development the economy evolves from amalthusianregime wheretechnologicalprogressis slow andpopulationgrowthprevents anysustainedriseinincomepercapita intoapost malthusianregime wheretechnological progress rises and population growth absorbs only part of output growth ultimately a demographic transition reverses the positive relationship between income and population growth andtheeconomyentersamoderngrowthregimewithreducedpopulationgrowth

inequality and growth why differential fertility matters we argue that inequality and growth are linked through differential fertility and the accumulation of human capital we build an overlapping generations model in which dynasties differ in their initial endowment with human capital growth the income distribution and fertility are endogenous due to a quantiy quality tradeoff families with less human capital decide to have more children and invest less in education when initial inequality is high large fertility differentials lower the growth rate of average human capital since poor families who invest little in education make up a large fraction of the population in the next generation a calibrated model shows that this fertility differential effect is quantitatively important we also provide empirical evidence to confirm the links between inequality differential fertility and growth suggested by the model

vintage human capital demographic trends and endogenous growth we study how economic growth is affected by demographics in an overlapping generations model with a realistic survival law individuals optimally chose the dates at which they leave school to enter the labor market and at which they retire endogenous growth arises thanks to the accumulation of generation specific human capital favorable shifts in the survival probabilities always induce longer schooling and later retirement but have an ambiguous effect on growth the relationship between the growth of population and per capita growth is hump shaped increases in longevity can be responsible for a switch from a no growth regime to a sustained growth regime and for a positive relationship between fertility and growth to vanish

differential difference equations in economics on the numerical solution of vintage capital growth models we examine techniques for the analytical and numerical solution of state dependent differential difference equations such equations occur in the continuous time modelling of vintage capital growth models which form an important class of models in modern economic growth theory the theoretical treatment of non state dependent differential difference equations in economics was discussed by benhabib and rustichini 1991 in general though the state dependence of a model prevents its analytical solution in all but the simplest of cases we review a numerical method for solving state dependent models using simple examples to illustrate our discussion in addition we apply this numerical method to the solow vintage capital growth model