{"id":"W2146863011","doi":"10.1080/10800379.2007.12106437","title":"South Africa Exports of Metal and Articles of Base Metal: A Gravity Model Approach","year":2007,"lang":"en","type":"article","venue":"Studies in Economics and Econometrics","topic":"Global trade and economics","field":"Economics, Econometrics and Finance","cited_by":19,"is_retracted":false,"has_abstract":true,"ca_institutions":"","funders":"","keywords":"Gravity model of trade; Base metal; Economics; Population; International trade; International economics; Business; Demography; Engineering","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":[0.0002746819,0.0004787965,0.0003672846,0.001652785,0.0003791364,0.0009130129,0.0003232361,0.0004179183,0.002474814],"category_scores_gemma":[0.0009614062,0.0002883631,0.001101387,0.001839493,0.0002571883,0.0008688159,0.0005182617,0.0003472761,0.0003225419],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.001070015,"about_ca_system_score_gemma":0.0006927506,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.04095116,"about_ca_topic_score_gemma":0.01861694,"domain_scores_codex":[0.9998782,0.00004198716,0.000005217615,0.00002824888,0.00001448547,0.00003174227],"domain_scores_gemma":[0.9997712,0.00009583285,0.00007826462,0.0000157436,0.00001917642,0.00001971574],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"simulation_or_modeling","study_design_gemma":"simulation_or_modeling","study_design_scores_codex":[0.0002831882,0.0001266864,0.3414981,0.0001582474,0.0006026612,0.001589917,0.0008075702,0.5803715,0.002138742,0.04284489,0.004033589,0.02554496],"study_design_scores_gemma":[0.0001072178,0.0002070947,0.1629129,0.0001224095,0.0002961353,0.000606034,0.001781866,0.8052284,0.0009402807,0.01559875,0.0121387,0.00006013754],"study_design_candidate":"simulation_or_modeling","study_design_consensus":"simulation_or_modeling","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9898897,0.0002608016,0.004896348,0.000265141,0.000006036131,0.00002244642,0.0006407438,0.00003307292,0.00398569],"genre_scores_gemma":[0.9954345,0.0004989766,0.002024709,0.00001759447,0.000006311427,0.00002255829,0.0006038296,0.000008705228,0.001382784],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.04095116,"threshold_uncertainty_score":0.08142561,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.1913169692449285,"score_gpt":0.2427188404799309,"score_spread":0.05140187123500239,"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."}}