What Can Laboratory Experiments Teach Us About Emissions Permit Market Design?

The laboratory provides a test bed to inform many design choices for emissions permit markets. Experiments are sometimes strongly motivated and structured by specific theoretical models and predictions, but in other cases the experiment itself can be the model of the market and regulatory environment. We review specific experimental applications that address design issues for permit auction rules, permit expiration dates and banking, liability rules, and regulatory enforcement.cap-and-trade, auctions, liability, regulation, compliance, banking, Environmental Economics and Policy, Institutional and Behavioral Economics,

Recommended Play and Correlated Equilibria: An Experimental Study

This study reports a laboratory experiment wherein subjects play a hawk-dove game. We try to implement a correlated equilibrium with payoffs outside the convex hull of Nash equilibrium payoffs by privately recommending play. We find that subjects are reluctant to follow certain recommendations. We are able to implement this correlated equilibrium, however, when subjects play against robots that always follow recommendations, including in a control treatment in which human subjects receive the robot "earnings." This indicates that the lack of mutual knowledge of conjectures, rather than social preferences, explains subjects' failure to play the suggested correlated equilibrium when facing other human players.Game Theory ; Experiments ; Coordination ; Common Knowledge

A Market with Frictions in the Matching Process: An Experimental Study

We construct a laboratory market with the structure of the theoretical model of Burdett, Shi, and Wright (2001). The model is a simple and natural way to represent a market in which there is a friction in the matching process between buyers and sellers. Sellers first simultaneously post prices at which they are willing to sell their single unit of a good. Buyers then simultaneously choose a seller from whom to attempt to purchase a unit. If more than one buyer chooses the same seller, the good is randomly sold to one of the buyers. If a seller is not chosen by any buyer, his unit is not sold. Our experimental results show a broad consistency with the model of Burdett et al. and less support for an alternative model, which is analogous to the model of Montgomery (1991), and which has different assumptions on the strategic interaction between sellers. The main departures that we observe from the Burdett et al. model are that (a) price dispersion exists and is slow to decay, (b) prices exceed the equilibrium level when there are only two sellers, and (c) buyers’ purchase probabilities are insufficiently responsive to price differences when there are two sellers.

An Experimental Study of Compliance and Leverage in Auditing and Regulatory Enforcement

Evidence suggests that a large majority of firms and individuals comply with regulations and tax laws even though the frequency of inspections and audits is often low. Moreover, fines for noncompliance are also typically low when regulatory violations are discovered. These observations are not consistent with static compliance models. Harrington (1988) modified these static models by specifying a dynamic game in which some agents have an incentive to comply even when the cost of compliance each period is greater than the expected penalty. This paper reports a laboratory experiment based on the Harrington model framework, in which subjects move between two inspection groups that differ in the probability of inspection and severity of fine. Subjects decide to comply or not in the presence of low, medium or high compliance costs. Enforcement leverage arises in the Harrington model from movement between the inspection groups based on previous observed compliance and noncompliance. Our results indicate that consistent with the model, violation rates increase when compliance costs become higher and as the probability of switching groups becomes lower. Behavior does not change as sharply as the model predicts, however, since violation rates do not jump from 0 to 1 as parameters vary across critical thresholds. A simple model of bounded rationality explains these deviations from optimal behavior.Regulatory Compliance, Laboratory Experiments, Tax.

A LABORATORY COMPARISON OF UNIFORM AND DISCRIMINATIVE PRICE AUCTIONS FORREDUCING NON-POINT SOURCE POLLUTION

Land use changes to reduce non-point source pollution, such as nutrient runoff to waterways from agricultural production, incur opportunity costs that are privately known to landholders. Auctions may permit the regulator to identify those management changes that have greater environmental benefit and lower opportunity cost. This paper reports a testbed laboratory experiment in which landowner/sellers compete in sealed-offer auctions to obtain part of a fixed budget allocated by the regulator to subsidize pollution abatement. One treatment employs uniform price auction rules in which the price is set at the lowest price per unit of environmental benefits submitted by a seller who had all of her offers rejected. Another treatment employs discriminative price rules in which successful sellers receive their offer price. Our results indicate that subjects recognize the cost-revelation incentives of the uniform price auction, as a majority of offers are within 2 percent of cost. By contrast, a majority of offers in the discriminative price auction are at least 8 percent greater than cost. Nevertheless, the regulator spends more per unit of environmental benefit in the uniform price auction, and the discriminative price auction has superior overall market performance.Uniform Price Auctions, Discriminative Price Auctions, Land Use Change,Laboratory Experiments, Environmental Policy.

Emissions Variability in Tradable Permit Markets with Imperfect Enforcement and Banking

Unexpected variation in emissions can have a substantial impact on the prices and efficiency of tradable emission permit markets. In this paper we report results from a laboratory experiment in which subjects participate in an emissions trading market in the presence of emissions uncertainty. Subjects face exogenous, random positive or negative shocks to their emission levels after they make production and emission control plans. In some sessions we allow subjects to bank their unused permits for future use. In all sessions, subjects can trade in a reconciliation period to buy or sell extra permits following the shock realization. Subjects then report their emissions to the regulatory authority and they are placed in different inspection groups depending on their compliance history. The design of our experiment allows us to identify important interactions between emission shocks, banking, compliance and enforcement. We find that the relationship between emission shocks and price changes is significantly stronger without banking, so banking helps smooth out the price variability arising from the imperfect control of emissions. This greater price stability comes at a cost, however, since noncompliance and emissions are significantly greater when banking is allowed.Emissions Trading, Correlated Shocks, Banking, Laboratory Experiments.

COMMUNICATION AND COORDINATION IN THE LABORATORY COLLECTIVE RESISTANCE GAME

This paper presents a laboratory collective resistance (CR) game to study how different forms of non-binding communication among responders can help coordinate their collective resistance against a leader who transgresses against them. Contrary to the predictions of analysis based on purely self-regarding preferences, we find that non-binding communication about intended resistance increases the incidence of no transgression even in the one-shot laboratory CR game. In particular, we find that the incidence of no transgression increases from 7 percent with no communication up to 25-37 percent depending on whether communication occurs before or after the leader’s transgression decision. Responders’ messages are different when the leaders can observe them, and the leaders use the observed messages to target specific responders for transgression.Communication, Cheap Talk, Collective Resistance, Laboratory Experiment, Social Preferences

Communication and Coordination in the Laboratory Collective Resistance Game

This paper presents a laboratory collective resistance (CR) game to study how different forms of non-binding communication among responders can help coordinate their collective resistance against a leader who transgresses against them. Contrary to the predictions of analysis based on purely self-regarding preferences, we find that non-binding communication about intended resistance increases the incidence of no transgression even in the one-shot laboratory CR game. In particular, we find that the incidence of no transgression increases from 7 percent with no communication up to 25-37 percent depending on whether communication occurs before or after the leader’s transgression decision. Responders’ messages are different when the leaders can observe them, and the leaders use the observed messages to target specific responders for transgression.Communication ; Cheap Talk ; Collective Resistance ; Laboratory Experiment ; Social Preferences

COORDINATING COLLECTIVE RESISTANCE THROUGH COMMUNICATION AND REPEATED INTERACTION

This paper presents a laboratory collective resistance (CR) game to study how different forms of repeated interactions, with and without communication, can help coordinate subordinates' collective resistance to a ???divide-and-conquer??? transgression against their personal interests. In the one-shot CR game, a first???mover (the ???leader???) decides whether to transgress against two responders. Successful transgression increases the payoff of the leader at the expense of the victim(s) of transgression. The two responders then simultaneously decide whether to challenge the leader. The subordinates face a coordination problem in that their challenge against the leader's transgression will only succeed if both of them incur the cost to do so. The outcome without transgression can occur in equilibrium with standard money-maximizing preferences with repeated interactions, but this outcome is not an equilibrium with standard preferences when adding non-binding subordinate ???cheap talk??? communication in the one-shot game. Nevertheless, we find that communication (in the one-shot game) is at least as effective as repetition (with no communication) in reducing the transgression rate. Moreover, communication is better than repetition in coordinating resistance, because it makes it easier for subordinates to identify others who have social preferences and are willing to incur the cost to punish a violation of social norms.Communication, Cheap Talk, Collective Resistance, Divide-and-Conquer, Laboratory Experiment, Repeated Games, Social Preferences

Uncertainty and Resistance to Reform in Laboratory Participation Games

This paper presents a participation game experiment to study the impact of uncertainty and costly political participation on the incidence of reform. Fernandez and Rodrik (1991) show that uncertainty about who will ultimately gain or lose as a result of a reform can prevent its adoption. We introduce intra-group conflict into this framework by incorporating costly political participation, which creates a natural incentive for free-riding on fellow group members’ efforts to influence policy outcomes. An agent, however, may still be willing to participate if her participation is likely to affect the policy outcome given the probabilities of participation by others. Our experimental findings show that uncertainty reduces the incidence of reform even with costly political participation, and that an increase in the cost of participation reduces the participation of all agents, regardless of whether they belong to the majority and minority. This second result cannot be reconciled with the standard mixed strategy Nash equilibrium, but is consistent with the quantal response equilibrium.Reform, Uncertainty, Experiment, Participation Game, Bounded Rationality, Quantal Response Equilibrium