{"id":"W2236929650","doi":"10.2139/ssrn.1136440","title":"Matching and Challenge Gifts to Charity: Evidence from Laboratory and Natural Field Experiments","year":2008,"lang":"en","type":"article","venue":"SSRN Electronic Journal","topic":"Experimental Behavioral Economics Studies","field":"Social Sciences","cited_by":2,"is_retracted":false,"has_abstract":false,"ca_institutions":"University of Victoria","funders":"","keywords":"Natural (archaeology); Field (mathematics); Law; Political science; Law and economics; Sociology; Geography; Mathematics; Archaeology","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.000548853,0.000118843,0.0001674904,0.00004987129,0.0009480331,0.00007079324,0.0001654034,0.00005946219,0.00001936599],"category_scores_gemma":[0.00005875691,0.0001188243,0.00002714962,0.0000650831,0.0001220667,0.0004915731,0.0001136926,0.0006565612,0.000009931432],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0005288545,"about_ca_system_score_gemma":0.0004459705,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.005339064,"about_ca_topic_score_gemma":0.009520599,"domain_scores_codex":[0.9984158,0.00008453795,0.0001606476,0.0002263851,0.0001804379,0.0009322118],"domain_scores_gemma":[0.9995774,0.00009476594,0.00006965945,0.00007640354,0.00003989184,0.0001418499],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"qualitative","study_design_gemma":"qualitative","study_design_scores_codex":[0.0003711588,0.0002900624,0.1802355,0.00001214961,0.0004280483,0.0001002,0.6031291,0.000002241242,0.06061221,0.1195697,0.0004044144,0.03484521],"study_design_scores_gemma":[0.003635713,0.003209552,0.0478075,0.0007042125,0.0001509021,0.0002873049,0.6342044,0.0000226881,0.02328298,0.2768604,0.00687037,0.00296392],"study_design_candidate":"qualitative","study_design_consensus":"qualitative","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9556812,0.04073903,0.00002411096,0.00289776,0.0002422699,0.000115227,0.000001822211,0.00002101203,0.0002775744],"genre_scores_gemma":[0.9622492,0.03685556,0.0001847904,0.0002676491,0.0002296381,0.000008581806,2.668874e-7,0.000009417185,0.000194915],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.1572908,"threshold_uncertainty_score":0.8071102,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.035628808816737,"score_gpt":0.3326567830565941,"score_spread":0.2970279742398571,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}