. . . . . "1.37653E0"^^ . "7.2E1"^^ . "1.21841E-1"^^ . "4.11368E-2"^^ . "https://data.cooperationdatabank.org/vocab/prop/expectationsLevel" . "Anatol Rapoport" . "1988-09-01:00"^^ . . . "5.0E-1"^^ . "72"^^ . "72"^^ . "5.27778E-1"^^ . . . . . "2"^^ . "2.5E-1"^^ . . "2"^^ . . "1988"^^ . "Published Article" . "Prisoner's Dilemma Game" . "Lab" . "Monetary" . "Stranger" . "One-shot" . . "2020-12-17T00:18:09.338Z"^^ . . . . "2020-12-01T00:00:00.000Z"^^ . .