{"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":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.002102505,0.0006963488,0.0006399156,0.001156579,0.001082696,0.002299127,0.001223979,0.000746935,0.00664448],"category_scores_gemma":[0.00795433,0.0002610743,0.001118882,0.003100614,0.001123163,0.0007899657,0.001226148,0.001256127,0.000439324],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.008844023,"about_ca_system_score_gemma":0.01285099,"about_ca_topic_candidate":true,"about_ca_topic_consensus":true,"about_ca_topic_score_codex":0.9030068,"about_ca_topic_score_gemma":0.8232018,"domain_scores_codex":[0.9986589,0.0004650095,0.00004662371,0.00016098,0.0002724112,0.0003960525],"domain_scores_gemma":[0.9967952,0.001346357,0.0005530026,0.0002869605,0.0007819682,0.0002364393],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"simulation_or_modeling","study_design_scores_codex":[0.0005024169,0.000183876,0.3777801,0.0001815306,0.0006051091,0.0009002661,0.0008119075,0.3323618,0.001100025,0.2257245,0.02063419,0.03921436],"study_design_scores_gemma":[0.0004118284,0.0002808728,0.2748218,0.0002117434,0.001028775,0.000290911,0.002682896,0.629698,0.001741973,0.05311391,0.03556926,0.0001480502],"study_design_candidate":"simulation_or_modeling","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9043058,0.001582091,0.02735053,0.00418298,0.0001894142,0.0002345241,0.004759969,0.0005599405,0.05683485],"genre_scores_gemma":[0.9881088,0.0006696173,0.003530716,0.0001666919,0.00001849356,0.00002886787,0.001315954,0.00004364105,0.00611723],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.09699321,"threshold_uncertainty_score":0.1951288,"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."}}