[Show description][Hide description] DESCRIPTION: This study employs a laboratory experiment to assess the performance of tradable permit markets on dynamic efficiency arising from cost-reducing investment. The permit allocation rule is the main treatment variable, with permits being fully auctioned or grandfathered. The experimental results show significant investment under both allocation rules in the presence of ex ante uncertainty over the actual investment outcome. However, auctioning permits generally provides stronger incentives to invest in R&D, leading to greater dynamic efficiency compared to grandfathering.
[Show abstract][Hide abstract] ABSTRACT: This paper reports an experiment to evaluate the effectiveness of repeated interactions in deterring leaders from using divide-and-conquer strategies to extract surplus from their subordinates, when every decision-maker involved is a group instead of an individual. We find that both the resistance rate by subordinates and the divide-and-conquer transgression rate by leaders are the same in the group and individual repeated coordinated resistance games. Similar to the individual game, adding communication to the group game can help deter opportunistic behavior by the leaders even in the presence of repetition.
[Show abstract][Hide abstract] ABSTRACT: This paper presents a laboratory experiment to investigate how social motivations and free-form communication (Rich Communication) can facilitate coordinated resistance against divide-and-conquer transgressions. In our experiment, a leader first decides whether to extract surplus from a victim and shares it with a beneficiary. We find that the successful joint resistance rate increases almost four-fold (from 15 to 58%) when moving from more restrictive communication treatments to Rich Communication. We also find that the significant impacts of Rich Communication are driven more by the responders' ability to send free-form messages rather than the multiple and iterative opportunities to indicate intentions.
European Journal of Political Economy 10/2014; 37. DOI:10.1016/j.ejpoleco.2014.10.005 · 1.44 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Many social dilemmas exhibit nonlinearities and equilibrium outcomes in the interior of the choice space. This paper reports a laboratory experiment studying whether peer punishment promotes socially efficient behavior in such environments, which have been ignored in most experimental studies of peer punishment. It compares the effectiveness of peer punishment in a linear public good game to the effectiveness of this decentralized enforcement mechanism in two nonlinear social dilemma games: a piecewise linear public good game and a common pool resource game. While peer punishment improves cooperation in these new environments, the impact of punishment is weaker and takes longer to be effective. This appears to be due to the greater complexity of the nonlinear settings, which makes socially optimal choices more difficult to identify.
[Show abstract][Hide abstract] ABSTRACT: History-dependent strategies are often used to support cooperation in repeated game models. Using the indefinitely repeated common-pool resource assignment game and a perfect stranger experimental design, this paper reports novel evidence that players who have successfully used an efficiency-enhancing turn-taking strategy will teach other players in subsequent supergames to adopt this strategy. We find that subjects engage in turn taking frequently in both the Low Conflict and the High Conflict treatments. Prior experience with turn taking significantly increases turn taking in both treatments. Moreover, successful turn taking often involves fast learning, and individuals with turn taking experience are more likely to be teachers than inexperienced individuals. The comparative statics results show that teaching in such an environment also responds to incentives, since teaching is empirically more frequent in the Low Conflict treatment with higher benefits and lower costs.
Economic Theory 10/2013; 54(2). DOI:10.1007/s00199-012-0718-y · 0.66 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Firms often cooperate explicitly in certain dimensions, such as research joint ventures, while competing in other markets. Cooperation in research and development can allow firms to internalize the external benefits of knowledge creation and increase the returns from R&D expenditures. Such cooperation may spill over to facilitate collusion in other markets, however, leading to losses in welfare and efficiency. This paper uses a laboratory experiment to examine if sellers successfully coordinate to fund a joint research project to reduce their costs, and how this collaboration affects pricing and efficiency in their market. The motivating example context is research collaborations to reduce costs of abating greenhouse gas emissions, and the potential impact on an emissions permit market. The experiment includes control treatments with separate R&D cooperation and markets. Our results show that although subjects usually cooperate when given an opportunity, cooperative actions are less common when they also compete in the market. This suggests that market competition can spill over to hinder cooperation. Communication between individuals improves cooperation in all environments, particularly when the market is present. Nevertheless, the data indicate little support for market collusion. This weak evidence for behavioural spillovers suggests that policy makers could promote R&D collaborations and still expect robust market competition.
[Show abstract][Hide abstract] ABSTRACT: This paper presents an experimental study of two mechanisms that influence incentives to reduce ambient pollution levels. In the formal mechanism individuals face a penalty if the group generates total pollution that exceeds a specified target, whereas in the informal mechanism individuals can choose to incur costs to punish each other after observing their group members' emissions. We examine the effectiveness of these mechanisms, in isolation and in combination. The results suggest that the formal targeting mechanism is significantly more effective than informal peer punishment in reducing pollution and increasing efficiency. Peer punishment however improves the performance of the formal mechanism.
Journal of Environmental Economics and Management 05/2013; 65(3):469–484. DOI:10.1016/j.jeem.2012.09.001 · 2.17 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: This article reports a duopoly experiment in which sellers compete to sell to a potentially patient buyer. Each period sellers simultaneously post prices and the buyer costlessly observes either one or both prices. The buyer can then either accept an observed price or reject all offers. Following a rejection, sellers may have an opportunity to post prices again in another round. We study how the duopolists' pricing behavior responds to changes in the likelihood of the buyer observing multiple prices, γ, and the probability of continuing to another round, δ. The unique stationary equilibrium features mixed strategies. Consistent with the equilibrium, observed prices are decreasing in γ and δ. Contrary to the equilibrium, however, buyers sometimes reject profitable price offers, and average prices are lower than predicted when only one round of offers is possible and higher than predicted in the multiple‐round game.
[Show abstract][Hide abstract] ABSTRACT: This study reports a simple experiment using induced-value items to assess the accuracy of the Becker, DeGroot, Marschak (BDM) method (1964 Behavioral Science) for measuring preferences. Although the BDM mechanism is incentive compatible the data indicate that it can be empirically unreliable due to subject misconceptions about the game form. Subject choices appear to reflect preferences constructed through framing processes, but further analysis reveals types of misconceptions through specific patterns of behavior. The data are more consistent with a hypothesis that the choices represent mistakes, such as a misconception that the BDM is a first-price auction mechanism. This highlights that preferences should be considered as distinct from choices unless misconceptions are eliminated. Neglecting misconceptions and related mistakes can lead the theory of framing and the theory of revealed preference to result in incorrect interpretations of data. The paper is focused on an interpretation of data from a simple version of the BDM rather than techniques for improving the BDM. As discussed in the paper, a theoretical controversy clouds a discussion of BDM improvements and does not have a clear resolution at this time. We hope that the facts and analysis here will provide a foundation for such a discussion. .
[Show abstract][Hide abstract] ABSTRACT: Costless pre-play communication has been found to effectively facilitate coordination and enhance efficiency in games with Pareto-ranked equilibria. We report an experiment in which two groups compete in a weakest-link contest by expending costly efforts. Allowing intra-group communication leads to more aggressive competition and greater coordination than control treatments without any communication. On the other hand, allowing inter-group communication leads to less destructive competition. As a result, intra-group communication decreases while inter-group communication increases payoffs. Our experiment thus provides evidence that communication can either reduce or increase efficiency in competitive coordination games depending on different communication boundaries. This contrasts sharply with experimental findings from public goods and other coordination games, where communication always enhances efficiency and often leads to socially optimal outcomes.
Games and Economic Behavior 09/2012; 76:26-43. DOI:10.2139/ssrn.1673176 · 0.83 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: This study provides a unified framework to compare three canonical forms of competition: winner-take-all contests won by the best performer, winner-take-all lotteries where probability of success is proportional to performance, and proportional-prize contests in which rewards are shared in proportion to performance. Performance is affected by random noise, reflecting imperfect information. We derive equilibria and observe outcomes from each contest in a laboratory experiment. Equilibrium and observed efforts are highest in winner-take-all contests. Lotteries and proportional-prize contests have the same Nash equilibrium, but empirically, lotteries induce contestants to choose higher efforts and receive lower, more unequal payoffs. This result may explain why contest designers who seek only to elicit effort offer lump-sum prizes, even though contestants would be better off with proportional rewards.
[Show abstract][Hide abstract] ABSTRACT: We report laboratory experiments that use new, visually oriented software to explore the dynamics of 3x3 games with intransitive best responses. Each moment, each player is matched against the entire population, here 8 human subjects. A "heat map" offers instantaneous feedback on current profit opportunities. In the continuous slow adjustment treatment, we see distinct cycles in the population mix. The cycle amplitude, frequency and direction are consistent with the standard learning models. Cycles are more erratic and higher frequency in the instantaneous adjustment treatment. Control treatments (using simultaneous matching in discrete time) replicate previous results that exhibit weak or no cycles. Average play is approximated fairly well by Nash equilibrium, and an alternative point prediction, "TASP" (Time Average of the Shapley Polygon), captures some regularities that Nash equilibrium misses.
[Show abstract][Hide abstract] ABSTRACT: Tradable emissions permits have been implemented to control pollution levels in various markets around the world and represent a major component of legislative efforts to control greenhouse gas (GHG) emissions in the United States. Because permits are supplied for a fixed level of pollution, allowing the market for permits to determine the price, there is a desire for price control mechanisms which would protect firms otherwise susceptible to price spikes caused by fluctuations in the demand for pollution abatement. We test permit markets in an experimental laboratory setting to determine the effectiveness of several price control mechanisms. Evidence suggests that both permit supply adjustments and traditional price ceilings (hard ceilings) effectively limit elevated prices in this setting. In contrast, reserve auctions (associated with soft ceiling designs) do not consistently control prices, especially when a minimum reserve permit price is applied. Furthermore, the grandfathering of permits allows permit sellers to realize significant welfare gains at the expense of buyers under a soft ceiling policy. Of the two ceiling options, our results point towards a hard ceiling as the preferred mechanism for controlling short term price increases.
Environmental and Resource Economics 01/2012; DOI:10.1007/s10640-014-9810-z · 1.52 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The paper presents a complete information model of bidding in second price sealed-bid and ascending-bid (English) auctions, in which potential buyers know the unit valuation of other bidders and may spitefully prefer that their rivals earn a lower surplus. Bidders with spiteful preferences should overbid in equilibrium when they know their rival has a higher value than their own, and bidders with a higher value underbid to reciprocate the spiteful overbidding of the lower value bidders. The model also predicts different bidding behavior in second price as compared to ascending-bid auctions. The paper also presents experimental evidence broadly consistent with the model. In the complete information environment, lower value bidders overbid more than higher value bidders, and they overbid more frequently in the second price auction than in the ascending price auction. Overall, the lower value bidder submits bids that exceed value about half the time. These patterns are not found in the incomplete information environment, consistent with the model.
[Show abstract][Hide abstract] ABSTRACT: Early emissions trading programs have obtained a very high rate of compliance, in part by using continuous emissions monitors (CEMs) that automatically record emissions data on a 24‐hour basis. As they expand into a wider range of pollutants and sources, however, such policies will have to rely on less automated forms of self‐reporting. This article asks if improved “affirmative motivations” for compliance based on perceptions of a policy's fairness could reduce the likelihood of underreporting, thereby lowering verification costs without unduly jeopardizing environmental integrity. Using a computerized laboratory emissions trading market, we find that many subjects reported emissions honestly in situations where dishonest reporting would have been more profitable, as well as a statistically significant association of affirmative motivations based on perceptions of a policy's fairness with honest reporting. These results suggest that designing an emissions trading program to increase its perceived fairness among users has the potential to increase honest emissions reporting and reduce monitoring costs.
[Show abstract][Hide abstract] ABSTRACT: This paper compares the performance of four different trading institutions in laboratory markets. Two institutions, the continuous double auction and the single call market, are commonly employed on organized exchanges. Two other "hybrid" institutions, the uniform price double auction and multiple call market, link the other institutions in different dimensions. The laboratory environment features four buyers and four sellers who receive random values and costs in each period and who have a one-unit trading capacity. Therefore, each period provides an observation of price formation and exchange in a thin market environment. We find that trading efficiency is lowest in the institutions that permit only one transaction opportunity each period, primarily due to insufficient trading volume. However, the institutions that permit a single trading opportunity force all traders to transact at a uniform price, which tends to generate prices that more accurately reflect underlying market conditions.
[Show abstract][Hide abstract] ABSTRACT: This paper introduces a contest with random noise and a shared prize that combines features of Tullock (1980) and Lazear and Rosen (1981). As in Lazear and Rosen the effort expended by a player is observed with noise, but here players who expend some positive effort receive a share of the prize according to their relative performance. The share of the prize is modeled as a Tullock contest success function. We show that this contest generates similar results to Lazear and Rosen. In particular, as the level of noise increases the equilibrium effort decreases. We also show that, as the noise variance approaches to zero, the equilibrium effort in a contest with a random noise approaches to the equilibrium effort of a simple lottery contest.
[Show abstract][Hide abstract] ABSTRACT: Over the past two decades, experimental methods have entered the mainstream as one of the empirical methodologies of economic
science. Early experimental work focused on issues in individual decision-making and industrial organization, but in recent
years economists have applied laboratory methods to study topics in macroeconomics, international economics, information economics,
finance, and other fields. Applied economists have also conducted experiments to gather data expressly for use in policy debates.
The broadening of the domain of experimental economics has created several clearly identifiable branches of the field. The
focus of this volume is one of these branches, the study of the behavior of markets. The papers in this volume represent several
current directions of research on experimental markets.
[Show abstract][Hide abstract] ABSTRACT: Purpose – The chapter reports a laboratory emissions trading experiment with imperfect enforcement that introduces environmental framing as a treatment variable.Methodology – The research uses the methodology of laboratory experimental economics. In the current design, subjects self-reported their “emissions” at the end of each trading period and were inspected probabilistically and fined when they underreported.Findings – Transaction volume and compliance rates were significantly lower in the environmentally framed condition, compared to the more standard neutrally framed control.Practical implications – The latter result suggests that environmental framing reduced subjects' incentives to honestly report “pollution” to the experimental “regulator.” As experimenters employ more “framed field experiments” outside the lab, it may be important to evaluate such pure framing effects in the lab if a main research goal is to compare lab and field experiment outcomes.Originality/value – Experimental economics research rarely manipulates environmental framing as a treatment variable. The substantial impact of framing on subject behavior documented in this study highlights its importance, particularly in the presence of moral concerns such as honest reporting.
Research in Experimental Economics 05/2011; 14:77-114. DOI:10.1108/S0193-2306(2011)0000014006