These 2 Words Will Make You More Selfish

These 2 Words Will Make You More Selfish
**FILE** In this Oct. 25, 1929 file photo, stock brokers are seen at the New York Stock Exchange as panic seeking continues from the previous day. (AP Photo)
**FILE** In this Oct. 25, 1929 file photo, stock brokers are seen at the New York Stock Exchange as panic seeking continues from the previous day. (AP Photo)

Students were twice as likely to betray their partner in a Prisoner's Dilemma if told they were playing a game called "Wall Street."

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