Meritocratic Matching Can Dissolve the Efficiency-Equality Tradeoff: the Case of Voluntary Contributions Games

Nax, Balietti, Murphy, Helbing (submitted -- 2015)

Quiz

Subjects were given a quiz after instructions to test their understanding of the game. Only after passing the quiz were subjects allowed to begin play.

Quiz Questions

Q.1 - Coins: How many coins do you get every of the 40 rounds ?
Available answers: [20, 10, 5, Other / Not clear from instructions]
Q.2 - Lowest: If you transfer 5 coins to the group account, what is the minimum amount of coins that you can win in this round ?
Available answers: [5, 17.5, 10, Other / Not clear from instructions]
Q.3 - Guarantee: If you transfer 5 coins to the group account, and all others do the same, what is the minimum amount of coins that you can win in this round ?
Available answers: [7.5, 25, 20 ,Other / Not clear from instructions]
Q.4 (Perfect, High, Low) - Scenario: Given the setup below, what will your position in the ranking be ?
Number of PlayersTransfer to Group Account
40
8 (including you)5
410
Availble answers: [I am equally likely to take any rank, I will always be ranked between the 5th and 12th positions (all equally likely for me), and never a higher or lower rank, On average I will be ranked in the middle (my expected rank is 8.5), Other / Not clear from instructions]
Q.4 (Random) - Scenario: Are you more likely to be matched in a group with other high-contributers if you also put in a large amount than if you put in only a small amount ?
Available answers: [Yes, No, Only if I put more than 10, Other / Not clear from instructions]

Quiz Results