the economics of a blend mandate for biofuels a biofuel blend mandate may increase or decrease consumer fuel prices with endogenous oil prices depending on relative supply elasticities biofuel tax credits always reduce fuel prices tax credits result in lower fuel prices than under a mandate for the same level of biofuel production if tax credits are implemented alongside mandates then tax credits subsidize fuel consumption instead of biofuels this contradicts energy policy goals by increasing oil dependency co 2 emissions and traffic congestion while providing little benefit to either corn or ethanol producers these social costs will be substantial with tax credits costing taxpayers 28 7 billion annually by 2022 copyright 2008 oxford university press

satisficing and stochastic choice abstract satisficing is a hugely influential model of boundedly rational choice yet it cannot be easily tested using standard choice data we develop necessary and sufficient conditions for stochastic choice data to be consistent with satisficing assuming that preferences are fixed but search order may change randomly the model predicts that stochastic choice can only occur amongst elements that are always chosen while all other choices must be consistent with standard utility maximization adding the assumption that the probability distribution over search orders is the same for all choice sets makes the satisficing model a subset of the class of random utility models

consideration review of research and prospects for future insights the authors review the behavioral underpinnings of consideration set formation and revisit the theoretical and empirical evidence that led them to develop an individual level model of consideration

price setting in online markets does it click using a unique dataset of daily u s and u k price listings and the associated number of clicks for precisely defined goods from a major shopping platform we shed new light on how prices are set in online markets which have a number of special properties such as low search costs low costs of monitoring competitors prices and low costs of nominal price adjustment we document that although online prices are more flexible than offline prices they nevertheless exhibit relatively long spells of fixed prices large size and low synchronization of price changes considerable crosssectional dispersion and low sensitivity to predictable or unanticipated changes in demand conditions qualitatively these patterns are similar to those observed for offline prices a finding that suggests a need for more research on the sources of price rigidities and dispersion

using price distributions to estimate search costs we show how the equilibrium restrictions implied by standard search models can be used to estimate search cost distributions using price data alone we consider both sequential and nonsequential search strategies and develop estimation methodologies that exploit equilibrium restrictions to recover estimates of search cost heterogeneity that are theoretically consistent with the search models we illustrate the method using online prices for several economics and statistics textbooks

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

the dual process drift diffusion model evidence from response times we introduce a model of response time and choice that borrows from two distinct psychological traditions as in dual process models rapid automatic decisions are qualitatively different from considered decisions as in the drift diffusion model delayed considered decisions occur when confidence hits a threshold level we conduct a simple experiment in which our hybrid model matches key properties of the data as our model predicts decision times are bimodal automatic decisions are of far lower quality than considered decisions and automatic decisions are more prevalent when prior information improves thereby raising their quality jel d83 d87 c91

testing models of consumer search using data on web browsing and purchasing behavior using a large data set on web browsing and purchasing behavior we test to what extent consumers are searching in accordance to various classical search models we nd that the benchmark model of sequential search with a known distributions of prices can be rejected based on the recall patterns we observe in the data moreover we show that even if consumers are initially unaware of the price distribution and have to learn the price distribution observed search behavior for given consumers over time is more consistent with non sequential search than sequential search with learning our

search and price dispersion in online grocery markets abstract consumers often purchase multiple products at a time from retailers creating multi product incentives for search in this paper we consider how product variety affects consumer search intensity and the dispersion of prices in multi product retail markets we employ online grocery pricing data from four large retailers in the uk to estimate search costs and equilibrium price dispersion for food products under circumstances where i consumers search for single products and ii consumers search for multiple products at once we compare estimates in each case between a model in which utility increases with product variety and a model in which utility is not a function of variety relative to our preferred specification with variety effects in utility we find estimates of both search cost and search frequency to be biased upwards in single product settings when variety effects are ignored however we find estimates of search costs are biased upwards while search frequency is biased downwards in multi product settings when variety effects in utility are ignored

a testable theory of imperfect perception we provide a new characterization of bayesian expected utility maximization the novel feature of the model is our separation of actions from prizes the signature of the resulting theory is the impossibility of raising utility by switching wholesale from one action to another we provide applications to robustness to the recovery of utility from choice data and to model

optimal adaptive price search consider the problem of a consumer desiring to buy a good which is sold at a variety of prices such a buyer will be able to obtain a sequence of price quotations from various sellers when should the buyer stop searching for a lower price if he continues he may obtain a lower price but he incurs additional time effort and expense in searching the optimal price search decision is one of balancing the expectation of a possibly lower price obtained by continued search against cumulative costs from search when the prices arise from a known probability distribution the optimal search strategy has certain well defined and desirable properties in the more realistic case that the buyer has only partial information about the price distribution and must update his beliefs after observing prices in the marketplace the problem becomes more complex and search strategies become less well behaved the major purpose of this article is to determine new conditions under which optimal policies have these desirable characteristics in the case where the consumer possesses only incomplete information about the distribution of prices price quotations he receives in addition to providing him with price possibilities provide him with information about that distribution rothschild 151 in citing an unpublished paper of gastwirth has noted that small specification errors for an assumed distribution can lead to substantial changes in expected number of searches and expected cost consequently the assumption of a known distribution of prices can have a profound effect on total cost 1 0022 053 l 8 l 040001 20 02 00 o

information customization and food choice in this article we employ a hypothetical discrete choice experiment dce to examine how much consumers are willing to pay to use technology to customize their food shopping we conjecture that customized information provision can aid in the composition of a healthier shop our results reveal that consumers are prepared to pay relatively more for individual specific information as opposed to generic nutritional information that is typically provided on food labels in arriving at these results we have examined various model specifications including those that make use of ex post de briefing questions on attribute non attendance and attribute ranking information and those that consider the time taken to complete the survey our main results are robust to the various model specifications we examine

the benefits of forced experimentation striking evidence from the london underground network we estimate that a signi cant fraction of commuters on the london underground do not travel their optimal route consequently a tube strike which forced many commuters to experiment with new routes taught commuters about the existence of superior journeys bringing about lasting changes in behavior this eect is stronger for commuters who live in areas where the tube map is more distorted thereby pointing towards the importance of informational imperfections we argue that the information produced by the strike improved network e ciency search costs are unlikely to explain the suboptimal behavior instead individuals seem to under experiment in normal times as a result of which constraints can be welfare improving jel classi cation d83 l91 r41

oligopolistic pricing with sequential consumer search n identical stores compete by choosing prices for a homogeneous good with constant marginal costs consumers search sequentially with perfect recall for the lowest price one class of consumers called shoppers have zero search costs while all other consumers have a positive search cost c there is a unique symmetric nash equilibrium price distribution with the property that it changes smoothly from marginal cost pricing when all consumers are shoppers and or c 0 and monopoly pricing when no consumers are shoppers remarkably as the number of stores increases the nash equilibrium becomes more monopolistic copyright 1989 by american economic association

sequentially rationalizable choice a sequentially rationalizable choice function is a choice function that can be retrieved by applying sequentially to each choice problem the same xed set of asymmetric binary relations rationales to remove inferior alternatives these con cepts translate into economic language some human choice heuristics studied in psychology and explain cyclical patterns of choice observed in experiments we study some properties of sequential rationalizability and provide a full character ization of choice functions rationalizable by two and three rationales

a model of search with price discrimination abstract we introduce observable heterogeneity across buyers into a model of simultaneous search buyers differences are informative about their willingness to search giving rise to price discrimination even if they all have the same willingness to pay we analyze and compare equilibrium outcomes when price discrimination is allowed and when it is not we find that the price comparison across consumers as well as the effects of banning price discrimination critically depend on the elasticity of the search cost distribution interestingly for normally distributed search costs there is an inverted u shape relationship between prices and buyers size similarly a ban on price discrimination hurts small and large buyers to the benefit of the medium size ones

non reservation price equilibrium and search without priors we analyse a model of oligopolistic competition in which consumers search without priors consumers do not have prior beliefs about the distribution of prices charged by firms and thus try to use a robust search procedure we show that the optimal stopping rule is stochastic and that for any distribution of search costs there is a unique market equilibrium which is characterised by price dispersion although listed prices approach the monopoly price as the number of firms increases the effective price paid by consumers does not depend on the number of firms

strategic pricing consumer search and the number of firms discover prices there are three distinct price dispersed equilibria characterized by low moderate and high search intensity the effects of an increase in the number of firms on search behaviour expected prices price dispersion and welfare are sensitive i to the equilibrium consumers search intensity and ii to the status quo number of firms for instance when consumers search with low intensity an increase in the number of firms reduces search does not affect expected price leads to greater price dispersion and reduces welfare in contrast when consumers search with high intensity increased competition results in more search and lower prices when the number of competitors in the market is low to begin with but in less search and higher prices when the number of competitors is large duopoly yields identical expected price and price dispersion but higher welfare than an infinite number of firms a question that has received much attention in economic theory is how the number of competitors and market outcomes are related despite the existence of work showing the contrary see e g satterthwaite 1979 rosenthal 1980 the prediction that emerges from a market where firms interact in a cournot fashion has come to dominate economic thought namely that an increase in the number of competitors leads to larger aggregate production lower market price and improved market performance measured in terms of some social welfare criterion ruffin 1971 this paper challenges the generality of this belief by presenting an oligopoly model with consumer search where the equilibrium expected price may be constant increasing or nonmonotonic in the number of firms we present an economy with two types of consumers consumers who search for prices at no cost fully informed and consumers who must pay a fixed search cost for each price quotation they observe less informed 1 all buyers have the same willingness to pay for the good and buy either a single unit or nothing at all on the supply side of the market there are n firms producing a homogeneous good at constant marginal cost we analyse a one shot simultaneous move game firms set prices and consumers decide how many prices to search for at the same moment in time our model is essentially an oligopolistic version of burdett and judd 1983 where some consumers search costlessly in this model consumers search using a fixed sample size search strategy i e they choose the number of prices to observe before receiving any offer nonsequential search is appealing when consumers find it more advantageous to gather price information quickly morgan and manning 1985 this occurs when the search outcome is observed with delay and delay is costly for instance an mba graduate looking for a job 1 the presence in the model of consumers who search costlessly captures the fact that some people have a

choice set heterogeneity and the role of advertising an analysis with micro and macro data abstract the authors show how to use microlevel survey data from a tracking study on brand awareness in conjunction with data on sales and advertising expenditures to improve the specification estimation and interpretation of aggregate discrete choice models of demand in a departure from the commonly made full information assumption they incorporate limited information in the form of choice sets to reflect that consumers may not be aware of all available brands at purchase time they find that both the estimated brand constants and the price coefficient are biased downward when consumer heterogeneity in choice sets is ignored these biased estimates can lead firms to make costly price setting mistakes in addition the tracking data enable the authors to identify separately two processes by which advertising influences market shares they find that advertising has a direct effect on brand awareness inclusion in choice set in addition to its effect on consumer preferences increase in utility this

eminent economists their life philosophies introduction the passion for research mauric allais i know a hawk from a handsaw kenneth j arrow on my attitudes sociopolitical and methodological william j baumol recollections and reflections of a comparativist abram bergson from chemistry to economics and beyond kenneth e boulding my quest for economic knowledge karl brunner from the inside looking out james m buchanan random walk and life philosophy gerard debreu how i tried to become an economist evsey d domar nicholas georgescu roegen about himself nicholas georgescu roegen autobiographical notes with reflections frank hahn my working philosophy charles p kindleberger my professional life philosophy l r klein social science ethics and the role of the public sector richard a musgrave my apprenticeship as an economist austin robinson reflections on political economy past present and future w w rostow my life philosophy policy credos and working ways paul a samuelson my search for welfare tibor scitovsky living in interdisciplinary space herbert a simon notes on copying robert m solow solving the most urgent problems first jan tinbergen scientific humanism as an ideal shigeto tsuru index

consumer search behavior and sunk costs abstract this paper presents the results of four economic experiments involving 41 undergraduate students who were assigned the task of searching for the lowest price from a known distribution of prices economic theory predicts that individuals should continue to draw until the expected gain of another search is less than the marginal search cost additionally once individuals have made a draw and then continued they should never return to a price drawn earlier exercise recall both of these predictions are tested in the paper and the results show that behavior is not always consistent with them it appears that individuals are making decisions based on the total return from searching rather than simply the marginal return from another draw

optimal nonparametric estimation of first price auctions this paper proposes a general approach and a computationally convenient estimation procedure for the structural analysis of auctioni data considering first price sealed bid auction models within the independent private value paradigm we show that the underlying distribution of bidders private values is identified from observed bids and the number of actual bidders without any parametric assumptions using the theoiy of minimax we establish the best rate of uniform convergence at which the latent density of private values can be estimated nonparametrically from available data we then propose a two step kernel based estimator that converges at the optimal rate

price search and periodic price discounts this paper empirically investigates the interplay between buyer search behavior and firm pricing strategy in a commodity market where many firms compete in price to sell homogeneous products we use the heterogeneity in buyer search cost to rationalize why a firm offers periodic price discounts and enjoys a high profit in such a market an estimation method is proposed to recover the nonparametric distribution of buyer search cost from the price and transaction volume data with both data we show that the search cost distribution can be estimated nonparametrically in a sequential search model and estimation results from a nonsequential search model are robust to the assumption on the maximum number of searches we also show that the commonly observed high low pricing strategy can be an optimal strategy for firms when buyers search for price information sequentially as an empirical application we use the proposed method to estimate the two search models using data on a commodity product sold by a firm

am i getting a good deal reference dependentdecision making when the reference price is uncertain models of consumer decision making commonly incorporate reference dependent preferences in these models the reference point is typically assumed to be known by the consumer however research on price recall and the reference formation process reveals that the reference price is often uncertain at the time of purchase reference price uncertainty creates ambiguity for the consumer about whether they are getting a good or bad deal this paper develops a model of consumer choice in the presence of reference dependent preferences when the reference price is uncertain data from two empirical studies that vary the product category and order of the elicitation of reference prices show that the new model generally outperforms conventional discrete choice models that either ignore reference prices or treat reference prices as certain the new model provides insights into the effect of reducing reference price uncertainty on consumer choice and reveals that high uncertainty smoothes the kink in the demand curve that is present in traditional reference price demand models

information acquisition under risky conditions across real and hypothetical settings i collect data on how subjects acquire information about risky choices in both real and hypothetical settings using process tracing software called mouselab on average there are no significant differences across settings in the amount of time subjects take to make a choice or the completeness of the information they acquire subjects also acquire information in sequences consistent with an integration model of decision making such as expected utility theory or prospect theory i do not find significant differences in risk preferences across settings on average but i do find that subjects risk preferences are related to the completeness of the information that they acquire and where they start their information acquisition jel c91 d80 d83

price beliefs and experience do consumers beliefs converge to empirical distributions with repeated purchases we use data on consumers subjective beliefs about the distribution of prices in an online marketplace to investigate two questions of interest first when consumers face price uncertainty to what extent do their beliefs about the distribution of prices reflect the actual empirical price distribution second do consumers learn about features of the empirical distribution through experience using reported expectations for online textbook prices from a survey of 1224 college students we find that consumers with no prior experience in purchasing textbooks online tend to expect online prices to be higher than what is observed empirically however consumers with more experience in the marketplace generally have more accurate beliefs about the price distribution which is consistent with learning

estimating search benefits from path tracking data measurement and determinants we study consumer search behavior in a brick and mortar store environment using a unique data set obtained from radio frequency identification tags which are attached to supermarket shopping carts this technology allows us to record consumers purchases as well as the time they spent in front of the shelf when contemplating which product to buy giving us a direct measure of search effort we estimate a linear regression of price paid on search duration in which search duration is instrumented with a search cost shifter we show that this regression allows us to recover the marginal return from search in terms of price at the optimal stopping point for the average consumer our identification strategy and coefficient interpretation are valid for a broad class of search models and we are hence able to remain agnostic about the details of the search process such as search order and search protocol we estimate an average return from search of 2 10 per minute and explore heterogeneity across consumer

intertemporal price discrimination with complementary products e books and e readers this paper studies intertemporal price discrimination ipd with complementary products in the context of e readers and e books using individual level data 2008 2012 i estimate a dynamic demand

decision time consideration time and status quo bias economists increasingly appreciate the value of studying the time taken to make decisions in order to provide insights into decision makers choices this article shows that studying how time is allocated among individual options is also valuable in helping researchers to understand the impact default options have on decision makers attention allocation as approximated by how the time is allocated the study of this impact generates new insights into the well known choice phenomenon of status quo bias which typically refers to decision makers tendency to stick to a default option by designing a series of novel experiments i find that this bias arises even when the choice is among prizes of fixed monetary value expressed in arithmetic form i also find asymmetric attention i e more time devoted to default options and strikingly asymmetric choice errors specifically decision makers fail to select an alternative better than the default 28 of the time while they incorrectly select an alternative worse than the default only 11 of the time and provide evidence supporting a causal relationship between asymmetric attention and asymmetric errors jel d03 d12 d83

equilibrium price distributions equilibrium price distributions for a homogeneous product consistent with individual incentives are investigated they arise in informationally imperfect markets in which the only primitive datum is the distribution of search costs it is shown that single multi and continuous price distributions are all viable long run phenomena depending on the nature of search costs a method for computing equilibrium price distributions is also provided jevons law of one price has long been an accepted dictum in economic theory in a classroom presentation it still serves sometimes implicitly as a major premise in many micro models of market interaction much of the descriptive theory as well as welfare analysis hinges on this assumption yet one s day to day experience reveals that price differentials are a viable phenomenon and that looking for lower prices may very well be a rewarding activity the prospects of eventually hitting a bargain and the resulting price reduction would more than compensate for the cost incurred during the search process moreover the existence of price dispersions appear to be an empirically stable phenomenon snapshots of markets for relatively homogeneous products reveal substantial and recurring price differentials stigler 1961 and pratt wise and zeckhauser 1979 for example report some evidence supporting this claim an important article by stigler 1961 focused economists attention on the crucial role played by the informational structure of markets it gave rise to the study of the

the emerging liquid biofuel market in argentina implications for domestic demand and international trade while the world s transport energy matrix is still strongly linked to limited and heavily polluting fossil fuels new markets are appearing for the production and use of alternative transport fuels such as liquid biofuels due to an interconnected global economy such markets today are developing on a global scale with actors looking to meet local as well as potential international demand the aim of this paper is to describe and evaluate the emergence of markets for liquid biofuels in argentina it reveals that biodiesel production for international supply is likely to emerge in the short run up to 2010 giving the opportunity to be switched back to local supply in the medium run post 2010 it also suggests that a bioethanol market demand and supply does not seem to be likely in the short run and it is highly uncertain in the medium run as the most influential actors oppose its development on the other hand the current constellations of the biodiesel market appear to leave many uncertainties regarding its sustainability especially in regard to a limited role of small and medium sized enterprises and a suitable and diversified biodiesel feedstock currently the focus lies solely on very large scale production of biodiesel derived from soybean oil for the export market

price competition with satisficing consumers abstract the satisficing heuristic by simon 1955 has recently attracted attention both theoretically and experimentally in this paper i study a price competition model in which the consumer is satisficing and firms can influence his aspiration price via marketing unlike existing models whether a price comparison is made depends on both pricing and marketing strategies i fully characterize the unique symmetric equilibrium by investigating the implications of satisficing on various aspects of market competition the proposed model can help explain well documented economic phenomena such as the positive correlation between marketing and prices observed in some markets

competitive screening under heterogeneous information we study the interplay between informational frictions and second degree price discrimination our theory recognizes that consumers differ in their tastes for quality as well as in the information they possess about available offers which leads to dispersion over price quality menus in equilibrium while firms are ex ante identical we show that their menus are ordered so that more generous menus leave more surplus to consumers of all valuations we explore the cross section of equilibrium menus and variations in market conditions to generate empirical predictions on prices qualities and markups across firms and within a firm s product line for instance more competition may raise prices for low quality goods yet consumers are better off as the qualities they receive also increase the predictions of our model illuminate empirical findings in many markets such as those for cell phone plans yellow pages advertising cable tv and air travel

revealed preference rational inattention and costly information acquisition we develop a revealed preference test for optimal acquisition of costly information the test encompasses models of rational inattention sequential signal processing and search we provide limits on the extent to which attention costs can be recovered from choice data we experimentally elicit state dependent stochastic choice data of the form the tests require in simple cases tests con rm that subjects adjust their attention in response to incentives as the theory dictates

real time search in the laboratory and the market the standard model of labor market search posits repeated infinite horizon search from a fixed distribution of wages in a stationary environment under these circumstances the optimal search policy has a reservation wage property i e the decision to accept an offer involves a comparison of the offer with a time invariant constant w which itself is a function of the parameters characterizing the search environment a wage offer greater than or equal to w is accepted while any other is rejected and search is continued some early empirical job search studies however accumulated evidence of a declining trend in reservation wages over the course of an unemployment spell 1 since then several theoretical explanations for the declining reservation wage profiles have emerged all of which relax the stationarity assumption of the standard model for example reuben gronau 1971 assumes searchers have finite lives kenneth burdett 1977 gerard j van den berg 1990 james albrecht and susan vroman 2005 and others model short term unemployment benefits albrecht pieter a gautier and vroman 2006 permit directed search to heterogeneous prospects 2 john p danforth 1979 and silvio rendon 2006 consider general liquidity con strained search and burdett and tara vishwanath 1988 model learning about the job offer distribution behavioral explanations for declining reservation wages have been suggested by braunstein and schotter 1981 schotter and braunstein 1982 and others in this paper we present the results of the first ever to our knowledge real time search laboratory experiment performed in an effort to investigate this falling res ervation wage phenomenon where field studies of unemployed search often rely on strong identifying assumptions to recover searchers unobservable reservation wages in the laboratory we are able to elicit subjects complete reservation wage profiles in an incentive compatible manner 3 further in the laboratory we are able to

there goes gravity ebay and the death of distance we compare the effect of geographic distance on ebay and total international trade flows we consider the same 61 countries and basket of goods for both types of transactions we find the effect of distance to be on average 65 smaller on ebay we argue this difference is due to a reduction in search costs it increases with product differentiation and is higher when trade partners speak different languages when corruption in the exporting country is high and when uncertainty avoidance is high in the importing country moreover ebay s seller rating technology further reduces the distance effect on ebay

the economic and financial dimensions of degrowth abstract we respond to the call for future research on degrowth and specifically analyze the implications of economic degrowth on the monetary and financial system we argue that any early indications of degrowth would cause the stock market to crash which would trigger further deleveraging contagion and a deflation as a result the economy would implode which would eventually allow for a new rapid growth cycle given the likely extraordinary fiscal and monetary policy response during the implosion thus in our view degrowth as an explicit strategy option is economically unsustainable and unfeasible as a limitation our analysis centers on the examples of unplanned crisis leading to an economic implosion which imperfectly represent the idea of planned voluntary degrowth

price uncertainty and consumer search a structural model of consideration set formation we offer an econometric framework that models consumer s consideration set formation as an outcome of her costly information search behavior because frequently purchased products are characterized by frequent price promotions of varying depths of discounts a consumer faces significant uncertainty about the prices of the brands the consumers engage in a fixed sample search strategy that results in their discovering the posted prices of a subset of the available brands this subset is referred to as the consumer s consideration set the proposed model is estimated using the scanner data set for liquid detergents our key empirical results are i consumers zincur significant search costs to discover the posted prices of the brands ii whereas in store displays and feature ads do not influence consumers quality perceptions of the brands they significantly reduce search costs for observing the prices of the brands iii per capita income of consumer s household significantly increases her search costs and iv the consumers price sensitivity is seriously underestimated if we were to assume that consumers get to know all the posted prices at zero cost the proposed model is also estimated for the ketchup category to enable us to do cross category comparisons of consumers price search behavior

the early history of modern ecological economics abstract this paper provides a historical perspective for the discussion on ecological economics as a special field of research by studying the historical background of ecological economics the present discussions and tensions inside the field might become easier to understand and to relate to the study is inspired by other studies of the emergence of new research areas done by sociologists and historians of science and includes both cognitive and social aspects macro trends and the role of individuals the basis for the paper is a combination of literature studies and interviews with key researchers from the field the story opens with the emergence of the new environmental agenda in the 1960s which was influenced by the scientific development in biology and ecology then it is outlined how the environmental challenge was met by economics in the 1960s around 1970 the basic ideas of ecological economics were given modern formulations but it took a long gestation period from the beginning of the 1970s to the end of the 1980s before ecological economics took shape during this gestation period the personal relationships between the actors were formed and the meetings that were decisive for the formal establishment of ecological economics took place

correlation neglect in belief formation many information structures generate correlated rather than mutually independent signals the news media being a prime example this article provides experimental evidence that many people neglect the resulting double counting problem in the updating process in consequence beliefs are too sensitive to the ubiquitous telling and re telling of stories and exhibit excessive swings we identify substantial and systematic heterogeneity in the presence of the bias and investigate the underlying mechanisms the evidence points to the paramount importance of complexity in combination with people s problems in identifying and thinking through the correlation even though most participants in principle have the computational skills that are necessary to develop rational beliefs many approach the problem in a wrong way when the environment is moderately complex thus experimentally nudging people s focus towards the correlation and the underlying independent signals has large effects on beliefs

maximum likelihood estimation of search costs abstract in a recent paper hong and shum 2006 using price distributions to estimate search costs rand journal of economics 37 257 275 present a structural method to estimate search cost distributions we extend their approach to the case of oligopoly and present a new maximum likelihood method to estimate search costs we apply our method to a data set of online prices for different computer memory chips the estimates suggest that the consumer population can be roughly split into two groups which either have quite high or quite low search costs search frictions confer a significant amount of market power to the firms despite more than 20 firms operating in each of the markets we estimate price cost margins to be around 25 the paper also illustrates how the structural method can be employed to simulate the effects of the introduction of a sales tax

a review essay about foundations of neuroeconomic analysis by paul glimcher neuroeconomics aims to discover mechanisms of economic decision and express them mathematically to predict observed choice while the contents of neuroeconomic models and evidence are obviously different than in traditional economics some of the goals are identical to explain and predict choice the effects of comparative statics and perhaps make interesting new welfare judgments that are defensible to this end paul glimcher s important book carefully describes how economics psychological and neural levels of explanation can be linked a structure which has been successful in visual neuroscience as glimcher shows the neural evidence is quite strong for a process of learning valuations through prediction error and a simple model of neural valuation and comparison that corresponds to random utility though subject to normalization which produces menu effects there is also rapidly growing evidence for more complicated constructs in behavioral economics including prospect theory s account of risky choice hyperbolic time discounting level k models of games and social preferences corresponding to internal reward based on what happens to other agents

non reservation price equilibria and consumer search abstract reservation price equilibria rpe do not accurately assess market power in consumer search markets in most search markets consumers do not know important elements of the environment in which they search such as for example firms cost we argue that when consumers learn when searching rpe suffer from theoretical issues such as non existence and critical dependence on specific out of equilibrium beliefs we characterize equilibria where consumers rationally choose search strategies that are not characterized by a reservation price non rpe always exist and do not depend on specific out of equilibrium beliefs non rpe have active consumer search and are consistent with recent empirical findings

pass through and consumer search an empirical analysis retail price pass through is one of the most important issues facing manufacturers of consumer packaged goods although retailers tend to pass higher wholesale prices through to consumers quickly and completely they often do not pass on trade promotions currently asymmetric pass through is commonly thought to result from retailers exercise of market power alternatively it may be because of consumer search behavior and retailers competitive response we test this theory using a panel threshold asymmetric error correction model applied to wholesale and retail scanner data for ready to eat cereal for a number of retailers in the los angeles metropolitan market we find that consumer search behavior contributes significantly to imperfect pass through by allowing pass through to depend on market power and consumer search costs we find results that are contrary to the conventional wisdom namely market power causes retail prices to fall quickly and rise slowly whereas consumer search behavior causes retail prices to rise quickly and fall slowly precisely the rockets and feathers phenomenon

estimating the effects of global patent protection in pharmaceuticals a case study of quinolones in india under the trips agreement wto members are required to enforce product patents for pharmaceuticals the debate about the merits of this requirement has been extremely contentious many low income economies claim that patent protection for pharmaceuticals will result in substantially higher prices for medicines with adverse consequences for the health and well being of their citizens on the other hand research based global pharmaceutical companies argue that prices are unlikely to rise significantly because most patented products have therapeutic substitutes in this paper we empirically investigate the basis of these claims central to the ongoing debate is the structure of demand for pharmaceuticals in poor economies where because health insurance coverage is so rare almost all medical expense are met out of pocket using a detailed product level data set from india we estimate key price and expenditure elasticities and supply side parameters for the fluoroquinolones sub segment of the systemic anti bacterials i e antibiotics segment of the indian pharmaceuticals market we then use these estimates to carry out counterfactual simulations of what prices profits and consumer welfare would have been had the fluoroquinolone molecules we study been under patent in india as they were in the u s at the time our results suggest that concerns about the potential adverse welfare effects of trips may have some basis we estimate that in the absence of any price regulation or compulsory licensing the total annual welfare losses to the indian economy from the withdrawal of the four domestic product groups in the fluoroquinolone sub segment would be on the order of u s 450 million or about 73 of the sales of the entire systemic anti bacterials segment in 2000 of this amount foregone profits of domestic producers constitute roughly 50 million or 11 the overwhelming portion of the total welfare loss therefore derives from the loss of consumer welfare in contrast the profit gains to foreign producers in the absence of any price regulation are estimated to be only around 53 million per year

dynamic price competition in auto insurance brokerage we analyze brazilian data on auto insurance and document that a about 20 of policies are sold without brokerage commission b over 40 are sold at the highest fee allowed and c the remaining contracts are associated with a spread out distribution of fees static models cannot rationalize these findings we develop a dynamic model of price competition with search and switching costs that reproduces them we use the equilibrium structure to estimate the model parameters and infer the brokers expected earnings the frequency that insurees switch brokers and the counterfactual effects of a price ceiling policy

measuring the effects of search costs on equilibrium prices and profits abstract this paper assesses the effects of search costs on equilibrium prices and profits using an estimated model of demand and costs in a laundry detergent market i find that some firms profits initially rise and then fall with search costs overall the magnitude and direction of the search costs effects on prices and profits are heterogeneous this is because search costs create conflicting incentives for a firm to reduce prices to attract the attention of searching consumers yet also raise prices to harvest profit from consumers who are unaware of competing products these effects can vary with the relationship between the firms actual prices and the consumers pre search beliefs about prices

entry and competition effects in first price auctions theory and evidence from procurement auctions motivated by several interesting features of the highway mowing auction data from the texas department of transportation tdot we study three competing procurement auction models with endogenous entry our entry and bidding models provide several interesting implications for the first time we show that even within an independent private value paradigm as the number of potential bidders increases bidders equilibrium bidding behaviour can become less aggressive and the expected procurement cost may rise because the entry effect is always positive and may dominate the negative competition effect we then develop structural models of entry and bidding corresponding to the three models under consideration controlling for unobserved auction heterogeneity and use the recently developed semi parametric bayesian estimation method to analyse the data we select the model that best fits the data and use the corresponding structural estimates to quantify the entry effect and the competition effect with regard to the individual bids and the procurement cost copyright 2009 wiley blackwell

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

visual attention and attribute attendance in multi attribute choice experiments summary decision strategies in multi attribute choice experiments are investigated using eye tracking the visual attention towards and attendance of attributes is examined stated attendance is found to diverge substantively from visual attendance of attributes however stated and visual attendance are shown to be informative non overlapping sources of information about respondent utility functions when incorporated into model estimation eye tracking also reveals systematic nonattendance of attributes only by a minority of respondents most respondents visually attend most attributes most of the time we find no compelling evidence that the level of attention is related to respondent certainty or that higher or lower value attributes receive more or less attention copyright 2014 john wiley sons ltd

optimal search for product information consumers often need to search for product information before making purchase decisions we consider a tractable continuous time model of gradual learning in which consumers incur search costs to learn further product information and update their expected utility of the product at each search occasion we characterize the optimal stopping rules for either purchase or no purchase as a function of search costs and of the importance informativeness of each attribute this paper also characterizes how the likelihood of purchase changes with the ex ante expected utility search costs and the importance informativeness of each attribute we discuss optimal pricing the impact of consumer search on profits and social welfare and how the seller chooses its price to strategically affect the extent of the consumers search behavior we show that lower search costs can hurt the consumer because the seller may then choose to charge higher prices discounting creates asymmetry in the purchase and no purchase search thresholds and may lead to lower prices if search occurs in equilibrium or higher prices if there is no search in equilibrium this paper also considers searching for signals of the value of the product heterogeneous importance of attributes endogenous intensity of search and social learning this paper was accepted by pradeep chintagunta marketing

degrowth taking stock and reviewing an emerging academic paradigm degrowth has evolved within a decade from an activist movement into a multi disciplinary academic paradigm however an overview taking stock of the peer refereed degrowth literature is yet missing here we review 91 articles that were published between 2006 and 2015 we find that the academic degrowth discourse occupies a small but expanding niche at the intersection of social and applied environmental sciences the discourse is shaped by authors from high income mainly mediterranean countries until 2012 articles largely constitute conceptual essays endorsed by normative claims more recently degrowth has branched out into modelling empirical assessments and the study of concrete implementations authors tend to agree in that economic growth cannot be sustained ad infinitum on a resource constraint planet and that degrowth requires far reaching societal change whether degrowth should be considered as a collectively consented choice or an environmentally imposed inevitability constitutes a major debate among degrowth thinkers we argue that the academic discourse could benefit from rigid hypotheses testing through input output modelling material flow analysis life cycle assessments or social surveys by analyzing the potentials for non market value creation and identifying concrete well being benefits the degrowth discourse could receive wider public support and contribute to a paradigmatic change in the social sciences

semi nonparametric estimation of consumer search costs this paper studies the estimation of the distribution of non sequential search costs we show that the search cost distribution is identified by combining data from multiple markets with common search technology but varying consumer valuations firms costs and numbers of competitors to exploit such data optimally we provide a new method based on semi nonparametric estimation we apply our method to a dataset of online prices for memory chips and find that the search cost density is essentially bimodal such that a large fraction of consumers searches very little whereas a smaller fraction searches a relatively large number of stores copyright c 2012 john wiley sons ltd

can de growth be considered a policy option a historical note on nicholas georgescu roegen and the club of rome abstract at a few months interval georgescu roegen s the entropy law and the economic process 1971 and club of rome s limits to growth 1972 were published both emphasized the dangers of economic growth and both drew negative reactions from mainstream economists relying on archival evidence we show that georgescu roegen and the club of rome developed strategies of mutual support which would present them at first view as natural allies georgescu roegen actually became a member of the club of rome while dennis meadows acknowledged the influence of georgescu roegen s ideas on the team of authors of limits to growth but in the late 70 s the gap widened between georgescu roegen s adamant defense of de growth and the club of rome s less firm view of sustainable growth this paper explores the process leading to the self isolation of georgescu roegen by showing that beyond a shared acknowledgment that economic and biologic systems were interdependent technological optimism and ambitions for the global management of growth were central to the club of rome while georgescu roegen s personal history led him to ignore those practicalities and judge that de growth was inescapable

impacts of biodiesel on the brazilian fuel market this paper investigates market effects of the brazilian biodiesel law which made the use of biodiesel blended with petroleum diesel mandatory in brazil the study estimates the demand curve for diesel fuel biodiesel and petroleum diesel and the industry supply curve of biodiesel these two pieces of information have been used in a static analysis to draw scenarios with different biodiesel mandates the results show that the current proportion of biodiesel in the diesel mixture 5 increases consumers price by 1 7 and decreases the consumption by 1 5 compared to the scenario without biodiesel also an increase in the biodiesel percentage to 10 would raise the price by 3 5 and reduce the consumption by 3 2012 elsevier b v

consumer search costs and preferences on the internet we conduct an empirical analysis of consumer preferences and search costs on an internet platform using data from a major french platform priceminister we show descriptive evidence of substantial price dispersion among adverts for the same product of consumers often not choosing the cheapest advert and sometimes choosing an advert dominated in price and non price characteristics by another available advert we consider a sequential search model where consumers sample adverts in an endogenous order based on their preferences and search costs we show that the optimal search and purchase strategy can be characterized by a set of inequalities which can feasibly be tested on transaction and advert data this allows us to estimate for each transaction a set of preference and search cost parameter values thus allowing for flexible consumer heterogeneity in preferences and search costs the estimated model can then describe a wide range of consumer search and purchase behaviours we find that the model can explain almost all transactions in the data and requires non zero preferences and search costs for at least 50 and 22 respectively of observations we also find evidence of heterogeneous and sometimes substantial search costs

analysing gasoline demand elasticities a survey this paper is a survey of studies on gasoline demand although there are very many dxerent studies in this eld which sometimes appear to arrive at contradictory results we find that with proper stratification of studies by model and data type much of the contict turns to consensus in this survey we classtfy studies by data type and by ten d erent categories of model and with the exception of estimates on seasonal data which tend to be unstable and of certain inappropriate model formulations we find a fair degree of agreement concerning average short run and even long run income and price elasticities

an empirical model of search with vertically differentiated products this paper presents a nonsequential search model that allows for vertical product dierentiation in the unique symmetric equilibrium firms with dierent characteristics draw utilities from a common utility distribution because the firms dier in their characteristics this leads to dierent price distributions the model therefore provides a theoretical rationale for explaining price dispersion as a result of quality dierences and search behavior of consumers together using the equilibrium conditions derived from the model it is shown how to estimate search costs by maximum likelihood using only price data a data set on prices from dutch supermarkets reveals that the amount of search has decreased over the sampling period moreover ignoring vertical product dierentiation results in an overestimation of search costs

search costs and equilibrium price dispersion in auction markets abstract a leading explanation for price dispersion in posted price markets is search costs we incorporate this insight into a model of competing second price auctions similar to ebay by doing so we extend the narrow literature on competing auctions to capture price dispersion and grow the already large literature on price dispersion to include auctions we provide evidence on search costs and price dispersion using data collected from ebay identifying search costs by exploiting a discontinuity in the visibility of auctions due to ebay s search tool

a boundedly rational decision algorithm cognition requires scarce inputs including time and concentration since cognition is costly sophisticated decision makers should use mental shortcuts or heuristics to reduce cognitive burdens a model is proposed and tested that is motivated by these principles it is believed this model achieves four goals first the model makes quantitative behavioral predictions and hence provides a precise alternative to the rational actor hypothesis second the model is psychologically plausible because it is based on the actual decisions algorithms that subjects claim to use third the model is empirically testable such a test is provided in this paper fourth the model is broadly applicable because it can be used to analyze decision problems that can be represented in tree form

boundedly rational search with positive search costs abstract there is substantial evidence that humans make mistakes and that this deviation from perfect rationality can have profound behavioral consequences since search theory plays a central role in economic models it is imperative that the consequences of bounded rationality for search be studied in this paper worker bounded rationality is modeled as probabilistic choice while employers are assumed to be perfectly rational we find that worker welfare is non monotonic in the precision of the workers offers are higher and workers are better off with moderate levels of precision than with very low or with very high levels of precision

reserve price effects in auctions estimates from multiple regression discontinuity designs i introduction online auctions are an important trading mechanism in modern economies ebay alone has 81 million active users worldwide and auctions a billion objects annually ebay 2009 as data from auction settings has become accessible especially from online auction environments there has been a surge in empirical analysis testing whether the behavior of buyers and sellers is consistent with auction theory bajari and hortacsu 2004 we contribute to this empirical literature by presenting evidence from 260 000 online auctions of second hand cars that took place between january 2003 and november 2008 we identify the impact of a common feature of online and offline auctions public reserve prices on a rich set of auction outcomes 1 to establish causality we present evidence from multiple regression discontinuity rd research designs an empirical method that has not been used in the earlier literature to test the predictions of auction theory guided by theory we first identify the impact of reserve prices on various standard margins of bidder s behavior such as their entry into auctions bidding behavior within the auction and ultimately the winning bid we then combine these estimates to shed light on whether the reserve prices set by the auctioneer indeed maximize her ex ante expected revenue at a final stage we exploit our rich data to provide new insights that have not previously been documented in the empirical auctions literature such as the impact of reserve prices on i bidder s search behavior and ii the composition and characteristics of bidders this new evidence helps shed light on how to best characterize this environment in terms of whether bidders endogenously enter auctions and whether they hold symmetric valuations or not our analysis has broad relevance in three regards first car sales through auctions form an important share of the market the value of cars sold via auction in the united states was 89 billion in 2007 and used car dealers filled over 30 of their inventory via auctions roberts 2013 second the auction mechanism used in our setting an open ascending second price auction that allows proxy bidding is widely suggested to be the most prevalent online auction format bajari and hortacsu 2004 third the specific auction design feature we study reserve prices is commonly observed in online and offline formats the first set of outcomes we study are motivated by the theoretical auction literature these relate to the impact of reserve prices on winning bids the number of entrants that is the number of bidders that place at least one bid and the probability the object is sold 2 theory suggests reserve price impacts on these margins depend on three factors i whether bidders have private or common valuations of the auctioned object ii whether bidder entry is exogenous or endogenous and iii whether the reserve price signals the auctioneer s private information on the true value of the auctioned object in exogenous entry models predictions about the impact of reserve prices on these outcomes are robust with regard to whether bidders have private affiliated or common values for the object milgrom and weber 1982 myerson 1981 riley and samuelson 1981 and to whether the reserve price conveys a signal of the object s value to buyers cai riley and ye 2007 as is intuitive in this class of exogenous entry models a higher reserve price discourages entry of marginal bidders decreases the likelihood the object is sold and increases winning payments conditional on sale theoretical predictions on reserve price impacts are less clear cut in endogenous entry models levin and smith 1994 tan and yilankaya 2006 analogous to exogenous entry models a higher reserve price discourages entry of both potential and actual bidders and decreases the probability of sale however a higher reserve price might decrease winning payments through its adverse impact on entry

hysteresis price acceptance and reference prices the existence of price thresholds in grocery retailing is well documented most authors explain the existence of price thresholds using assimilation contrast theory adaptation level theory or prospect theory however each of these theories is untenable if consumers are believed to behave rationally we offer a theoretical explanation grounded in real options theory rot and economic hysteresis we test the rot hypothesis against three plausible alternatives using a maximum likelihood friction model that we augment for unobserved heterogeneity our findings support the rot hypothesis and suggest that the existence of price thresholds in aggregate data are driven by a common recognition of real option values which do not disappear with the inclusion of consumer heterogeneity

search and satisficing many everyday decisions are made without full examination of all available options and as a result the best available option may be missed we develop a search theoretic choice experiment to study the impact of incomplete consideration on the quality of choices we find that many decisions can be understood using the satisficing model of herbert simon 1955 most subjects search sequentially stopping when a satisficing level of reservation utility is realized we find that reservation utilities and search order respond systematically to changes in the decision making environment jel d03 d12 d83

discrete equilibrium price dispersion an explicit solution of an equilibrium model with price setting firms and searching customers makes possible a number of comparativestatics predictions about how cost differences among firms search costs of customers and taxes will affect the mean and variance of the distribution of market prices another implication of the model is that a firm s demand depends on the difference between its price and the average price in the market

search and consumer theory a consumer faces list prices for commodities but can buy one at a discount discounts vary randomly between sellers the number of quotations sought depends on list prices search costs and wealth this function is homogeneous of degree zero and provided some sufficient conditions are satisfied is increasing in wealth decreasing in search cost independent of the list price of the discounted commodity if indirect utility is multiplicatively separable increasing in the list price if the commodity is a necessity increasing in the list price of substitutes slutsky s equation is generalized to include search

rational inattention optimal consideration sets and stochastic choice we unite two basic approaches to modelling limited attention in choice by showing that the rational inattention model implies the formation of consideration sets only a subset of the available alternatives will be considered for choice we provide necessary and sufficient conditions for rationally inattentive behaviour which allow the identification of consideration sets in simple settings chosen options are those that are best on a stand alone basis in richer settings the consideration set can only be identified holistically in addition to payoffs prior beliefs impact consideration sets linear inequalities identify all priors consistent with each possible consideration set

is more competition always better an experimental study of extortionary corruption using a laboratory experiment we assess whether increasing competition among public officials reduces extortionary corruption we find that increasing the number of providers has no effect on bribe demands when citizens search costs are high but it increases corruption when search costs are low the effect is absent in a parallel setting framed as a standard market which we attribute to citizens using a nonsequential search strategy as opposed to sequential search in the corruption setting we conclude that efforts to reduce search costs such as infrastructure investments are preferable to anti corruption policies aimed at increasing the number of providers jel d73 d49 c91

search costs and adaptive consumers short time delays do not affect choice quality using online price comparison and shopping platforms makes experiencing slow connections lags and waiting times for information an unfortunate reality however little attention has been paid to analyzing the effects of such delayed display of information on product choice behavior this article explores the effect of time delays in a multi attribute choice laboratory experiment by not providing information immediately when requested but after short time delays increasing these waiting times reduced the amount of information looked up but did not affect choice quality higher time delays made decision makers use more deliberate search processes whereas low time delays induced inefficient over searching

retail gasoline pricing what do we know abstract we use a data set consisting of a three year panel of prices from a sample of gasoline stations located in suburban washington dc and a corresponding census of the region s stations to develop three new empirical findings about retail gasoline pricing first while average retail margins vary substantially over time by more than 50 over the three years we analyze the shape of the margin distribution remains relatively constant second there is substantial heterogeneity in pricing behavior stations charging very low or very high prices are more likely to maintain their pricing position than stations charging prices near the mean third retail gasoline pricing is dynamic despite the heterogeneity in station pricing behavior stations frequently change their relative pricing position in this distribution sometimes dramatically we then relate these three findings to relevant theories of retail pricing while many models of retail pricing are consistent with some of our findings we find that all have serious shortcomings

costly information acquisition experimental analysis of a boundedly rational model the directed cognition model assumes that agents use partially myopic option value calculations to select their next cognitive operation the current paper tests this model by studying information acquisition in two experiments in the first experiment information acquisition has an explicit financial cost in the second experiment information acquisition is costly because time is scarce the directed cognition model successfully predicts aggregate information acquisition patterns in these experiments when the directed cognition model and the fully rational model make demonstrably different predictions the directed cognition model better matches the laboratory evidence jel d83

econometrics of first price auctions in this paper we propose an estimation method for the empirical study of theoretical auction models we focus on first price sealed bid and descending auctions and we adopt the private value paradigm where each bidder is assumed to have a different private value only known to him for the object that is auctioned following mcfadden 1989 and pakes and pollard 1989 our proposed method is based on simulations specifically the method relies on a simulated nonlinear least squares objective function appropriately adjusted so as to obtain consistent estimates of the parameters of interest we illustrate the proposed method by studying a market of agricultural products where descending auctions are used our analysis takes into account heterogeneity of the auctioned objects and the fact that only the winning bid is observed we estimate the parameters that characterize the distribution of the unobserved private values for each auctioned object

instability of endogenous price dispersion equilibria a simulation models of price posting by firms and search by consumers such as burdett and judd 1983 often feature equilibria with endogenous price dispersion however such equilibria are strategically fragile in order to investigate how robust they are in the absence of an external coordination mechanism i simulate various protocols firms may use to update their prices despite firms being myopic some protocols yield results close to the benchmark model if firms rush to update before observing competitors actions profits are higher on average but volatile and cyclical with cost dispersion prices become more stable as they are more closely tied to costs all results are robust to moderate menu costs

economic search an experimental study this paper presents results of experiments designed to test several of the hypotheses present in the theoretical literature on optimal economic search first we test whether the subjects searchers actually search for wages in ways that are consistent with setting an optimal reservation wage we then proceed to determine experimentally the effects of risk aversion increased search costs changes in risk brought about by a mean preserving transformation of the distribution of wage offers the presence or absence of recall the existence of a finite horizon and the searcher s state of knowledge about the underlying distribution of wages in general we find that the searchers exhibit behavior that is consistent with that predicted by theory differences between risk neutral and risk averse searchers are found and the responses of both groups to changes in search costs in the degree of risk or in the state of knowledge are consistent with theoretical predictions

consideration sets and competitive marketing we present a model of competitive marketing based on the notion that consumers are boundedly rational and that firms use marketing tactics in an attempt to influence consumers decision process the standard model of consumer behaviour assumes that the consumer applies well defined preferences to a perfectly perceived set of available alternatives we retain the assumption that consumers have stable preferences but relax the assumption that they have a perfect perception of what is relevant for their consumption problem thus allowing firms to manipulate that perception our aim is to explore the market implications of this departure from the standard model especially for the way firms deploy marketing strategies in competitive environments the cornerstone of our model is the observation that in the modern marketplace consumers face an overwhelmingly large variety of products and therefore often use screening criteria deliberate as well as unconscious in order to reduce the number of relevant alternatives as a result consumers apply their preferences not to the set of objectively feasible alternatives but to a potentially smaller set which they construct at an earlier stage of the decision process borrowing a term from the marketing literature we refer to this set as the consideration set the basic idea underlying this term is that consumers may be unaware of some of the feasible products and even when they become aware of a new product they still need to be persuaded to consider it as a potential substitute to their currently consumed product

assessing the degrowth discourse a review and analysis of academic degrowth policy proposals abstract debates on ecological and social limits to economic growth and new ways to deal with resource scarcity without compromising human well being have re emerged in the last few years central to many of these is a call for a degrowth approach in this paper a framework is developed to support a systematic analysis of degrowth in the academic literature this article attempts to present a clearer notion of what the academic degrowth literature explores by identifying organising and analysing a set of proposals for action retrieved from a selection of articles the framework is applied to classify proposals according to their alignment to ecological economics policy objectives sustainable scale fair distribution and efficient allocation type of approach top down versus bottom up and geographical focus local national or international a total of 128 peer reviewed articles focused on degrowth were reviewed and 54 that include proposals for action were analysed the proposals identified align with three broad goals 1 reduce the environmental impact of human activities 2 redistribute income and wealth both within and between countries and 3 promote the transition from a materialistic to a convivial and participatory society the findings indicate that the majority of degrowth proposals are national top down approaches focusing on government as a major driver of change rather than local bottom up approaches as advocated by many degrowth proponents the most emphasised aspects in the degrowth literature are related to social equity closely followed by environmental sustainability topics such as population growth and the implications of degrowth for developing nations are largely neglected and represent an important area for future research moreover there is a need for a deeper analysis of how degrowth proposals would act in combination

search for differentiated products identification and estimation when consumers search for differentiated products a given search decision can be explained either by low search cost or by low tastes for the set of products already found we propose an identification strategy that allows to estimate the search cost distribution in the presence of unobserved tastes the required data takes the form of conditional search decisions observations of search actions combined with previously observed product displays we develop an application using clickstream data from a hotel search platform estimates of price elasticity of demand in the search model differ from those in the static model reflecting the bias due to endogeneity of search generated choice sets