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Context Effects in a Negatively Framed Social Dilemma Experiment

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Abstract

A number of studies of the positively-framed voluntary contribution mechanism (VCM) public goods game have examined the role of context on participant behavior. Relatively little attention, however, has been given to the effects of context in negatively-framed VCM games even though this setting is relevant to a wide array of real world challenges, such as common pool resource use and pollution externalities. This study uses a carefully-controlled laboratory experiment to investigate the degree to which the context in which decisions are made influences decision making in a negatively-framed VCM laboratory experiment. The context treatments that we evaluate vary communication, voting, and the status quo of the initial endowment. Results indicate that providing groups the opportunity to communicate and vote significantly reduces choices that impose external costs. Importantly, the pro-social effects of communication and voting are strongest when the status quo endowment is the private account, which generates costs on other participants. This result suggests that the effect of the status quo endowment is a function of whether the social dilemma is framed positively or negatively when communication between participants is allowed.

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Notes

  1. The typical distinction between a CPR and a public good is whether use of the good reduces the quantity or quality of the good available to other users. By altering the framing of resource use, however, one could express conservation in the use of a CPR as improving resource availability for all other users, or free-riding in a public good situation as reducing the quantity of the good available to others.

  2. Note that this is functionally equivalent to the payoff function used in Messer et al. (2007)

    $$\begin{aligned} \pi _{i} =x_i +\frac{1.5}{7}g_i +\frac{1.5}{7}\sum _{j\ne i} g_{j}, \text{ where} x_i +g_i =1. \end{aligned}$$

    .

  3. To provide a concrete example of the payoff calculations in the negative and positive frame, suppose that each of the seven participants in a group chooses to allocate half of their experimental dollar to the private account and half to the public account. In the negative frame that we utilize in the experiments, each participant would receive 1.25 in earnings from the private account (\(2.5*0.5=1.25\)), 0.75 in earnings from the public account (\(1.5*0.5=0.75\)), and would be assessed a 0.75 loss from the aggregate allocations to the private account (\(0.214*0.5*7=0.75\)). Each participant’s earnings for that round would therefore be 1.25 experiment dollars (\(1.25+0.75-0.75=1.25\)). This is equivalent to the 1.25 experimental dollar payout from the positively-framed experiment under the same contribution conditions. In this case each participant would earn 0.50 from the allocation to their private account, 0.107 from their allocation to the public account (\(0.214*0.5=0.107\)), and 0.643 from the contributions to the public account from other members of the group (\(0.214*0.5*6=0.643\)).

  4. The actual terminology used in the instructions for the communication sessions stated that the “discussion is free and open, except that no deals or threats are allowed.” While this could potentially be interpreted as precluding any form of verbal agreement regarding the allocation of endowments, the actual discussions between participants in the communication sessions suggests that participants did not interpret the word “deal” in this broad a fashion.

  5. The OLS model was estimated using the cluster option in STATA 11.

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Correspondence to Kent D. Messer.

Appendix: Experiment Instructions and Screenshot

Appendix: Experiment Instructions and Screenshot

1.1 Instructions: Treatment 1 (baseline)

Welcome to an experiment in the economics of decision making. In the course of the experiment, you will have opportunities to earn money. Any money earned during this experiment is yours to keep. Please read these instructions carefully and do not communicate with any other participants during the experiment.

In today’s experiment, you will participate in a number of rounds. The number of rounds has been determined prior to the start of the experiment. Throughout the experiment, you will be in a group of seven participants.

At the start of reach round, you and everyone else in your group will initially have $1.00 allocated to your Account B. Therefore, initially $7.00 has been allocated to Account B in total ($1.00 \(\times \) 7 subjects). You, and everyone else in your group, will need to decide whether to give a contribution of this allocation by moving some or all of the $1.00 from Account B to Account A. For each round, three different items will determine the payoff for you and everyone else in your group:

The Account A Payoff is the amount of money that you contribute to Account A multiplied by 3/2 (=1.5).

The Account B Payoff is the amount of money that you do not give as a contribution to Account A, and thus keep in Account B, multiplied by 5/2 (=2.5).

The Account B Loss is the total amount of money that your group keeps in Account B multiplied by 3/14 (\(\sim \)0.214). The table on the right shows how the Account B Loss varies depending upon the total amount of money in Account B at the end of the round.

In summary, your earnings in each round are equal to your Account A Payoff, plus your Account B Payoff, minus the Account B Loss.

To give a contribution from Account B to Account A, enter the amount, if any, into the yellow cell in your spreadsheet, hit “Enter” on the keyboard, and then click the “Submit” button. After every participant has submitted their decision, the administrator will calculate the Account B Loss, which you can view once you are instructed to click the “Update” button.

Your earnings will be calculated automatically. You will then proceed to the next round and follow the same procedures.

At the end of the experiment, your earnings will be converted to US dollars with an exchange rate of 2. (If you make $30 in the experiment, you will get $15 US dollars).

1.2 Instructions: Treatment 2 (Status Quo)

Welcome to an experiment in the economics of decision making. In the course of the experiment, you will have opportunities to earn money. Any money earned during this experiment is yours to keep. Please read these instructions carefully and do not communicate with any other participants during the experiment.

In today’s experiment, you will participate in a number of rounds. The number of rounds has been determined prior to the start of the experiment. Throughout the experiment, you will be in a group of seven participants.

At the start of reach round, you and everyone else in your group will initially have $1.00 allocated to your Account A. Therefore, initially $7.00 has been allocated to Account A in total ($1.00 \(\times \) 7 subjects). You, and everyone else in your group, will need to decide whether to request a refund of this allocation by moving some or all of the $1.00 from Account A to Account B. For each round, three different items will determine the payoff for you and everyone else in your group:

The Account A Payoff is the amount of money that you do not request as a refund to Account B, and thus keep in Account A, multiplied by 3/2 (=1.5).

The Account B Payoff is the amount of money that you request as a refund from Account A to Account B, multiplied by 5/2 (=2.5).

The Account B Loss is the total amount of money that your group requests as a refund from Account A to Account B multiplied by 3/14 (\(\sim \)0.214). The table on the right shows how the Account B Loss varies depending upon the total amount of money in Account B at the end of the round.

In summary, your earnings in each round are equal to your Account A Payoff, plus your Account B Payoff, minus the Account B Loss.

To request a refund from Account A to Account B, enter the amount, if any, into the yellow cell in your spreadsheet, hit “Enter” on the keyboard, and then click the “Submit” button. After every participant has submitted their decision, the administrator will calculate the Account B Loss, which you can view once you are instructed to click the “Update” button.

Your earnings will be calculated automatically. You will then proceed to the next round and follow the same procedures.

At the end of the experiment, your earnings will be converted to US dollars with an exchange rate of 2. (If you make $30 in the experiment, you will get $15 US dollars)

1.3 Instructions: Treatment 5 (Communication/Voting)

(Other parts of instructions are the same as treatment 1)

\(\ldots \)

In today’s experiment, you will participate in a number of rounds. The number of rounds has been determined prior to the start of the experiment. Throughout the experiment, you will be in a group of seven participants. First, you will have the opportunity to vote on which market rules will be used for your group for the proceeding trading periods. A majority vote will determine which market rules will be implemented. Your vote will be confidential and will not be shared with any other members of the experiment. Before the vote, you will be given up to 5 min to discuss your opinions about the vote and donations to Account A with other subjects in your group. This discussion is free and open, except that no deals or threats are allowed. After the discussion, you will select your preference in your spreadsheet and click the “Submit Vote” button. After all of the votes have been submitted, the administrators will announce the outcome. There are two possible sets of market rules:

  1. (1)

    Private Lottery. Initially, you and everyone else in your group will be given a lottery ticket in each round. At the start of each round, you will need to decide whether you would like to keep the lottery ticket or sell it. If you decide to sell the lottery ticket, you will be paid $1.00. If you keep the lottery ticket, a coin toss will determine the payoff for this lottery ticket. If the coin toss is heads, the payoff is $2.00. If the coin toss is tails, the payoff is $0.00. The coin will be provided and flipped by a volunteer subject; therefore the odds for either a heads or a tails are equal.

  2. (2)

    Group Activity. At the start of reach round, you and everyone else in your group will initially have $1.00 allocated to your Account B. Therefore, initially $7.00 has been allocated to Account B in total ($1.00 \(\times \) 7 subjects). You, and everyone else in your group, will need to decide whether to give a contribution of this allocation by moving some or all of the $1.00 from Account B to Account A. For each round, three different items will determine the payoff for you and everyone else in your group.

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Messer, K.D., Suter, J.F. & Yan, J. Context Effects in a Negatively Framed Social Dilemma Experiment. Environ Resource Econ 55, 387–405 (2013). https://doi.org/10.1007/s10640-012-9631-x

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