{"id":"W1990489876","doi":"10.1007/s13524-012-0161-5","title":"Why Is Infant Mortality Higher in Boys Than in Girls? A New Hypothesis Based on Preconception Environment and Evidence From a Large Sample of Twins","year":2012,"lang":"en","type":"article","venue":"Demography","topic":"Demographic Trends and Gender Preferences","field":"Social Sciences","cited_by":202,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Ottawa","funders":"Brown University","keywords":"Firstborn; Birth order; Demography; Infant mortality; Affect (linguistics); Biological sex; Developmental psychology; Psychology; Population; Sociology","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":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.003072411,0.0004135443,0.0006072043,0.001324537,0.0004337204,0.0008950803,0.0008453687,0.0008769204,0.003792526],"category_scores_gemma":[0.01045439,0.0002112197,0.0009737043,0.0009803015,0.001695295,0.0008936287,0.0006346079,0.0006099758,0.0004240575],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0002516324,"about_ca_system_score_gemma":0.0002821314,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.003585535,"about_ca_topic_score_gemma":0.00310627,"domain_scores_codex":[0.9983202,0.0006366157,0.0001002773,0.0006213883,0.000190777,0.0001307021],"domain_scores_gemma":[0.994165,0.0032695,0.001310258,0.0006067244,0.000295198,0.0003533316],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0003741856,0.0000265017,0.9767546,0.00007577422,0.0004623111,0.0003897167,0.001054714,0.00007759432,0.0008714102,0.001794465,0.0006071878,0.01751148],"study_design_scores_gemma":[0.00003304423,0.0001599085,0.9937187,0.00004646143,0.0001691282,0.0006351758,0.001098311,0.0003945992,0.0003163182,0.002688125,0.0007265013,0.00001359332],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9826084,0.004671297,0.002214653,0.005707297,0.0002038222,0.00002256887,0.0004974592,0.00002942137,0.004044885],"genre_scores_gemma":[0.9971226,0.0007925283,0.0006514583,0.0006333026,0.0001692564,0.00001435417,0.0001518483,0.000009670383,0.0004550619],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.003792526,"threshold_uncertainty_score":0.01624864,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.08223183904052525,"score_gpt":0.3022969945323961,"score_spread":0.2200651554918709,"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."}}