efficient mechanisms for bilateral trading we consider bargaining problems between one buyer and one seller for a single object the seller s valuation and the buyer s valuation for the object are assumed to be independent random variables and each individual s valuation is unknown to the other we characterize the set of allocation mechanisms that are bayesian incentive compatible and individually rational and show the general impossibility of ex post efficient mechanisms without outside subsidies for a wide class of problems we show how to compute mechanisms that maximize expected total gains from trade and mechanisms that can maximize a broker s expected profit journal of economic literature classification number 026

measuring the financial sophistication of households many households invest in ways that are hard to reconcile with standard financial theory and that have been labelled as investment mistakes campbell 2006 calvet campbell and sodini henceforth ccs 2007 there is increasing interest among household finance research ers in the concept of financial sophistication defined as the ability of a household to avoid making such mistakes a growing empirical lit erature documents a cross sectional correlation between household characteristics and invest ment mistakes richer better educated house holds tend to be better diversified marshall blume and irwin friend 1975 ccs 2007 william goetzmann and alok kumar 2008 annette vissing jorgensen 2003 display less inertia julie agnew pierluigi balduzzi and annika sunden 2003 yannis bilias dimitris georgarakos and michael haliassos 2008 campbell 2006 ccs 2009 vissing jorgensen 2002 and have a weaker disposition to hold losing and sell winning stocks ccs 2009 ravi dhar and ning zhu 2006 than other house holds one feature of these earlier papers is that mistakes are investigated one at a time often

decentralized trading strategic behaviour and the walrasian outcome for a market with a finite number of agents pairwise matching and bargaining it is shown that even when the market is frictionless the equilibrium is not necessarily competitive it depends on the amount of information agents use if their behaviour is conditioned only on the sets of agents present and the time the competitive solution is the unique subgame perfect equilibrium if agents have full information and condition their behaviour on some of it there are also noncompetitive equilibria in which behaviour depends on specific information such as the identity of the trading partner and past events

a lifecycle perspective of stock market performance and wellbeing we estimate the effect of stock market fluctuations on subjective wellbeing and mental health using australian survey data over the period 2001 2012 which includes the global financial crisis a particular innovation of the paper is the use of three satisfaction measures overall financial employment and the use of a stylised lifecycle investment model these features coupled with a robust identification strategy based on comparing survey respondents interviewed in the same quarter and location allow us to better understand individual reactions to stock market changes we find that stock market increases lead to a significant but modest improvements in life satisfaction and mental health this effect is driven by young and middle aged males and is stronger for those with direct exposure to the stock market for young cohorts the stock market index acts as a leading indicator of employment prospects whilst for older cohorts it acts directly on financial satisfaction

a rudimentary random matching model with divisible money and prices abstract we consider a version of kiyotaki and wright s monetary search model in which agents can hold arbitrary amounts of divisible money a continuum of stationary equilibria indexed by the aggregate real money stock exists with all trading occurring at a single price there is always a maximum level of the real money stock consistent with existence of such an equilibrium in the limit as trading becomes faster relative to discounting any real money stock becomes feasible in such an equilibrium in contrast to the original kiyotaki wright model higher equilibrium real money stocks unambiguously correspond to higher welfare in this costless production environment journal of economic literature classification numbers d51 e40

evaluation of the subjective probabilities of survival in the health and retirement study in the health and retirement study respondents were asked about the chances they would live to 75 or to 85 we analyze these responses to determine if they behave like probabilities of survival if their averages are close to average probabilities in the population and if they have correlations with other variables that are similar to correlations with actual mortality outcomes we find that generally they do behave like probabilities and that they do aggregate to population probabilities most remarkable however is that they covary with other variables in the same way actual outcomes vary with the variables for example respondents with higher socioeconomic status give higher probabilities of survival whereas respondents who smoke give lower probabilities we conclude that these measures of subjective probabilities have great potential use in models of intertemporal decision making under uncertainty

stock market expectations of dutch households despite its importance for the analysis of life cycle behavior and in particular retirement planning stock ownership by private households is poorly understood among other approaches to investigate this puzzle recent research has started to elicit private households expectations of stock market returns this paper reports findings from a study that collected data over a two year period both on households stock market expectations subjective probabilities of gains or losses and on whether they own stocks we document substantial heterogeneity in financial market expectations expectations are correlated with stock ownership over the two years of our data stock market prices increased and expectations of future stock market price changes also increased lending support to the view that expectations are influenced by recent stock gains or losses

willingness to pay versus expected consumption value in vickrey auctions for new experience goods over the past two decades vickrey auctions have been widely used to elicit willingness to pay for new food products this article shows that in a multiperiod context it can be optimal for consumers to bid higher than the expected consumption value for a new experience good to obtain information about how the new good fits into their preference set the degree of uncertainty about the consumption value the purchasing frequency and expected future market prices affect both the expected value of the quality information and the subgame perfect bidding strategy in vickrey auctions for new experience goods

consumer preferences for fresh food items with multiple quality attributes evidence from an experimental auction of pork chops this study illustrates an application of experimental auction methods using both experimental economics and experimental design to evaluate consumer perceptions and willingness to pay wtp for fresh pork chops we test and reject hypotheses that a market prices and consumers wtp are unaffected by the level of attributes embodied in the pork chops b appearance based on photographs or actual product and actual taste are equally good sources of consumer information and c consumers are consistent in their preferences for fresh pork attributes a major conclusion is that predicting consumer demand for fresh pork or any fresh food based on appearance without tasting is unproductive

bargaining under incomplete information this paper presents and analyzes a bargaining model of bilateral monopoly under uncertainty under the bargaining rule proposed the buyer and the seller each submit sealed offers that determine whether the good in question is sold and the transfer price the nash equilibrium solution of this bargaining game implies an offer strategy of each party that is monotonic in its own reservation price and depends on its assessment of the opponent s reservation price issues of relative bargaining advantage and efficiency are examined for a number of special cases finally we discuss the appropriateness of the nash solution concept

on the multiplicity of monetary equilibria green zhou meets lagos wright abstract green and zhou relax the assumption made in early search based models of monetary exchange of indivisible money their paper and various extensions make much technical progress and derive some interesting substantive results in particular they show there is an indeterminacy of steady state monetary equilibria we reconsider this result in the framework of lagos and wright which is more tractable we show that a similar multiplicity arises and is much easier to derive and understand we also compare the results to those in related nonmonetary models and discuss how they depend on details including the number of agents and the timing

money and price dispersion we relax restrictions on the storage technology in a prototypical monetary search model to study price dispersion in this case buyers and sellers enter matches with potentially different willingness to trade across the distribution of possible bilateral matches prices generally will differ even though agents have identical preferences and technologies we provide existence conditions for a particularly simple equilibrium pattern of exchange we prove that in the limiting case where search frictions are eliminated equilibrium prices are uniform we also show that a higher initial money stock can raise the average price level and increase price dispersion

stock market participation family responses to housing consumption commitments as of 2007 many households had taken on very substantial commitments to housing and companion mortgage payments at the same time they held little in the way of a traditional buffer stock of safer liquid assets but were more likely to have opened stock market accounts many of these families when experiencing subsequent mortgage payment difficulties are shown to have been more likely to exit the stock market mortgage difficulties also inhibited families from becoming new stock market participants in this way stocks seem to have likely experienced some direct and indirect collateral damage from the housing market 2007 9

ruling out divergent speculative bubbles abstract the growth in the empirical literature on testing for divergent in mean speculative bubbles indicates that existing theoretical arguments for ruling out such price paths are not sufficiently compelling here we strengthen the case for ruling out explosive or implosive bubbles a priori by filling in two gaps first we demonstrate why divergent stochastic bubbles arising from purely extrinsic uncertainty as in blanchard 1979 cannot be equilibria in a monetary optimizing model second we show why existing arguments for ruling out implosive price bubbles are insufficient in some cases and we provide stronger arguments

dynamic monetary equilibrium in a random matching economy this article concerns an infinite horizon economy where trade must occur pairwise using a double auction mechanism and where fiat money overcomes lack of double coincidence of wants traders are anonymous and lack market power goods are divisible and perishable and are consumed at every date preferences are defined by utility stream overtaking money is divisible and not subject to inventory constraints the evolution of individual and economywide money holdings distributions is characterized there is a welfare ordered continuum of single price equilibria reflecting indeterminacy of the price level rather than of relative prices

experimental auction procedure impact on valuation of quality differentiated goods despite increased use of experimental auctions a myriad of different procedures are being employed without formal consideration of how the procedures might affect results this study investigates the effect of several procedural issues on valuation estimates from experimental auctions results indicate the second price auction generates higher valuations than english becker degroot marschak bdm and random nth price auctions especially in latter bidding rounds and that random nth price auction yields lower valuations than english and bdm auctions we find that endowing subjects with a good prior to eliciting bids can have an impact on valuations but the effect varies across auction mechanism

heterogeneity in expectations risk tolerance and household stock shares the attenuation puzzle this article jointly estimates the relationship between stock share and expectations and risk preferences the survey allows individual level quantitative estimates of risk tolerance and of the pe

comparing open ended choice experiments and experimental auctions an application to golden rice we use two experimental valuation methods to estimate consumer demand for genetically modified golden rice the first is an open ended choice experiment oece where participants name the quantities of golden rice and conventional rice demanded at each of several price combinations one of which will be randomly chosen as binding this allows us to estimate market demand by aggregating demand across participants this estimate of market demand also allows us to estimate own price elasticity and consumer surplus for golden rice comparing willingness to pay wtp estimates from the oece with those from a uniform price auction we find that oece wtp estimates exhibit less affiliation across rounds and the effects of positive and negative information under the oece are more consistent with prior expectations and existing studies we also find that while auction wtp estimates more than double across five rounds oece wtp estimates are stable across rounds and are always roughly equal to those from the final auction round

contingent prices and money price posting with directed search is a widely used trading mechanism coles and eeckhout showed that if sellers are allowed to post prices contingent on realized demand instead of one price then there is real market indeterminacy in this article we fit this contingent price posting protocol into a monetary economy we show that as long as holding money is costly there exists a unique equilibrium rather than a continuum in this equilibrium sellers post a low price for when the buyer is alone a high price for when several buyers show up and buyers randomize between sellers and money holdings

differential interpretation of public signals and trade in speculative markets most models of trade in speculative markets assume that agents interpret public information identically we provide empirical evidence on the relation between the volume of trade and stock returns around public announcements and we argue that the evidence is inconsistent with this assumption we then develop a model of trade around public announcements that incorporates differential interpretations and is consistent with the observed volume return relation then we test the standard model of belief revision underlying most models of trade using stock brokerage research analysts earnings forecasts the hypthesis of identical interpretations seems inconsistent with the forecast revisions in these data

does commodity money eliminate the indeterminacy of equilibrium abstract previous studies have shown that a random matching model with divisible fiat money and without constraint on agents money inventories possesses a continuum of stationary single price equilibria wallace j econom theory 81 1998 223 conjectures that the indeterminacy can be eliminated by the use of commodity money instead i find that in a similar random matching model with dividend yielding commodity money a continuum of stationary single price equilibria exists when the utility of dividend is not too high this result casts doubt on the conventional belief that the indeterminacy of monetary equilibrium is be caused only by the nominal nature of money

using laboratory experimental auctions in marketing research a case study of new packaging for fresh beef this paper illustrates the use of laboratory experimental auctions in a pretest market research program for new products we review the experimental auctions literature discuss the range of auction mechanisms available and present the advantages and disadvantages of using a particular mechanism for a laboratory pretest market we then present a step by step example of how a theoretically incentive compatible auction mechanism fifth price sealed bid was used in a laboratory pretest market for vacuum packaged beef based on the illustration we discuss the potential for using laboratory experimental auctions in pretest market research we present the limitations that may be encountered in such applications and outline research aimed at improving the behavioral properties of the technique

preference learning in consecutive experimental auctions this paper explores the origins of the strikingly high price premia paid for new food products in lab valuation exercises our experimental design distinguishes between two explanations of this phenomenon novelty of the experimental experience versus the novelty of the good i e preference learning bids reflect a person s desire to learn how an unfamiliar good fits into their preference set subjects bid in four consecutive experimental auctions for three goods that vary in familiarity candy bars mangos and irradiated meat our results suggest that preference learning is the main source of the high premia and that novelty of the experimental experience does not in itself artificially inflate valuations copyright 2000 oxford university press

consumer learning brand loyalty and competition in several markets consumers can gain further information regarding how well a product fits their preferences only by experiencing it after purchase this could then generate loyalty for the products tried first this paper considers a model in which consumers learn in the first period about the product they buy and then make choices in the second period about the competing products given what they learned in the first period the paper finds that if the distribution of valuations for each product is negatively positively skewed a firm benefits is hurt in the future from having a greater market share today the brand loyalty characteristic with negative skewness two effects are identified on one hand marginal forward looking consumers are less price sensitive than myopic consumers and this is a force toward higher prices on the other hand forward looking firms realize that they gain in the future from having a higher market share in the current period and compete more aggressively in prices for similar discount factors for consumers and firms the latter effect dominates the paper also characterizes the importance of consumer learning effects on the market outcome

when kahneman meets manski using dual systems of reasoning to interpret subjective expectations of equity returns to understand how decisions to invest in stocks are taken economists need to elicit expectations relative to expected risk return trade off one of the few surveys which have included such questions is the survey of economic expectations in 1999 2001 using this survey dominitz and manski find an important heterogeneity across respondents that can hardly be accounted for by simple models of expectations formation this paper claims that much of the heterogeneity derives from pathologies affecting respondents adapting a principle of dual reasoning borrowed from kahneman we classify respondents according to their sensitivity to these pathologies and find a strong homogeneity across the less sensitive respondents we then sketch a model of expectation formation

self confirming price dispersion in monetary economies abstract in a monetary economy we show that price dispersion arises as an equilibrium outcome without the need for costly simultaneous search or any heterogeneity in preferences production costs or search technologies a distribution of money holdings among buyers makes sellers indifferent across a set of posted prices leading to a non degenerate price distribution this price distribution in turn makes buyers indifferent across a range of money balances rationalizing the non degenerate distribution of money holdings we completely characterize the distribution of posted prices and money holdings in any equilibrium equilibria with price dispersion admit higher maximum prices than observed in any single price equilibrium and feature an increasing density of prices in contrast to existing theories price dispersion reduces welfare by creating mismatch between posted prices and money balances inflation exacerbates this welfare loss by shifting the distribution towards higher prices

liquidity a new monetarist perspective this essay surveys the new monetarist approach to liquidity work in this literature strives for empirical and policy relevance plus rigorous foundations questions include what is liquidity is money essential in achieving desirable outcomes which objects can or should serve in this capacity when can asset prices differ from fundamentals what are the functions of commitment and collateral in credit markets how does money interact with credit and intermediation what can and should monetary policy do the research summarized emphasizes the micro structure of frictional transactions and studies how institutions like monetary exchange credit arrangements or intermediation facilitate the exchange process

recession depression mental health effects of the 2008 stock market crash do sudden large wealth losses affect mental health we use exogenous variation in the interview dates of the 2008 health and retirement study to assess the impact of large wealth losses on mental health among older u s adults we compare cross wave changes in wealth and mental health for respondents interviewed before and after the october 2008 stock market crash we find that the crash reduced wealth and increased feelings of depression and use of antidepressant drugs and that these effects were largest among respondents with high levels of stock holdings prior to the crash these results suggest that sudden wealth losses cause immediate declines in subjective measures of mental health however we find no evidence that wealth losses lead to increases in clinically validated measures of depressive symptoms or indicators of depression

using an economic experiment to estimate willingness to pay for a new maternal nutrient supplement in ghana scaling up access to supplements designed to prevent undernutrition such as new small quantity lipid based nutrient supplements sq lns may require distribution via both public channels and retail markets the viability of sq lns retail markets will hinge on household level demand we use an economic experiment to characterize initial willingness to pay wtp for a maternal sq lns product in ghana wtp is positive for most participants though below the estimated cost of production for many wtp varies depending on income assets and parity status these findings have implications for the design of public health policy and hybrid public private delivery mechanisms

stock market crash and expectations of american households this paper utilizes data on subjective probabilities to study the impact of the stock market crash of 2008 on households expectations about the returns on the stock market index we use data from the health and retirement study that was fielded in february 2008 through february 2009 the effect of the crash is identified from the date of the interview which is shown to be exogenous to previous stock market expectations we estimate the effect of the crash on the population average of expected returns the population average of the uncertainty about returns subjective standard deviation and the cross sectional heterogeneity in expected returns disagreement we show estimates from simple reduced form regressions on probability answers as well as from a more structural model that focuses on the parameters of interest and separates survey noise from relevant heterogeneity we find a temporary increase in the population average of expectations and uncertainty right after the crash the effect on cross sectional heterogeneity is more significant and longer lasting which implies substantial long term increase in disagreement the increase in disagreement is larger among the stockholders the more informed and those with higher cognitive capacity and disagreement co moves with trading volume and volatility in the market