{"id":"W2133909707","doi":"10.20955/wp.2000.024","title":"Gravity Model Specification and the Effects of the Canada-U.S. Border","year":2000,"lang":"en","type":"report","venue":"","topic":"Global trade and economics","field":"Economics, Econometrics and Finance","cited_by":70,"is_retracted":false,"has_abstract":true,"ca_institutions":"","funders":"","keywords":"Specification; Gravity model of trade; Geography; Computer science; Business; Econometrics; Economics; International trade","routes":{"ca_aff":false,"ca_fund":false,"ca_venue":false,"about_ca":true,"invisible_to_affiliation_only":true},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0004295751,0.0001764646,0.0005414382,0.00003902155,0.00009268952,0.00003467981,0.0003320039,0.0001619066,0.0001131047],"category_scores_gemma":[0.0001197083,0.0001181605,0.0001428859,0.00008527592,0.0001353747,0.00004444293,0.00005900783,0.0002180056,0.00001128932],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0002406371,"about_ca_system_score_gemma":0.0004360139,"about_ca_topic_candidate":true,"about_ca_topic_consensus":true,"about_ca_topic_score_codex":0.4439398,"about_ca_topic_score_gemma":0.1986752,"domain_scores_codex":[0.9988182,0.00001221268,0.0006170039,0.0003138717,0.0000601,0.000178607],"domain_scores_gemma":[0.9987199,0.00008749208,0.0005178467,0.0006009752,0.0000334984,0.00004025416],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"theoretical_or_conceptual","study_design_gemma":"not_applicable","study_design_scores_codex":[0.00007233284,0.0001148604,0.02449987,0.0009620673,0.0005469637,0.000002198645,0.0002743333,0.001657056,0.000001750927,0.6506414,0.3145421,0.006685098],"study_design_scores_gemma":[0.000988526,0.00001363925,0.05630678,0.00005265614,0.00006295425,0.00001167786,0.00001843999,0.00604334,0.00003873284,0.0661262,0.8699062,0.0004307874],"study_design_candidate":"not_applicable","study_design_consensus":null,"genre_codex":"other","genre_gemma":"empirical","genre_scores_codex":[0.05279868,0.01189006,0.0001255591,0.002181798,0.001709398,0.0008893432,0.0005201799,0.00001290257,0.9298721],"genre_scores_gemma":[0.9456555,0.02257606,0.00006876731,0.0005075295,0.0001537631,0.00003192628,0.00002678464,0.00003015324,0.03094953],"genre_candidate":"empirical","genre_consensus":null,"teacher_disagreement_score":0.8989226,"threshold_uncertainty_score":0.8159469,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.03577119888378786,"score_gpt":0.2091832388369079,"score_spread":0.1734120399531201,"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."}}