{"id":"W4414171846","doi":"10.1007/s10479-025-06746-x","title":"Comparisons of mean-variance analysis and entropy-based approaches to portfolio selection under asymmetric returns in bear and bull markets","year":2025,"lang":"en","type":"article","venue":"Annals of Operations Research","topic":"Financial Markets and Investment Strategies","field":"Economics, Econometrics and Finance","cited_by":1,"is_retracted":false,"has_abstract":false,"ca_institutions":"Dalhousie University","funders":"","keywords":"Portfolio; Portfolio optimization; Post-modern portfolio theory; Sharpe ratio; Autoregressive model; Capital asset pricing model; Rate of return on a portfolio; Replicating portfolio; Financial market","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":[0.001609804,0.00008555969,0.0003708116,0.002629295,0.000123589,0.00009015389,0.0001119039,0.00007254334,0.00005654013],"category_scores_gemma":[0.0003182906,0.00009366266,0.00005043151,0.00395574,0.0001348521,0.0001622075,0.00005691503,0.0001503949,0.000002415086],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00002710081,"about_ca_system_score_gemma":0.00009691109,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.002223748,"about_ca_topic_score_gemma":0.001337445,"domain_scores_codex":[0.9988063,0.0000893145,0.0004945488,0.0003094948,0.00007823848,0.0002221096],"domain_scores_gemma":[0.999407,0.0001378302,0.00005874435,0.0001877919,0.0001529493,0.00005571797],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"theoretical_or_conceptual","study_design_gemma":"observational","study_design_scores_codex":[0.0000914957,0.0002611348,0.1972413,0.00008613292,0.0001912008,5.326557e-7,0.0001842346,0.009273726,0.0001153192,0.7901207,0.001975825,0.0004584233],"study_design_scores_gemma":[0.0003054221,0.0001684497,0.9304723,0.00003459565,0.00001469859,1.708378e-7,0.0002596795,0.05928269,0.001336743,0.006649742,0.001364621,0.0001109659],"study_design_candidate":"observational","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9654199,0.002461046,0.007799597,0.005996749,0.00002838303,0.0004699145,0.0000994028,0.00000637323,0.01771859],"genre_scores_gemma":[0.9963557,0.0006540242,0.002120137,0.000123299,0.000008494123,0.0000395923,0.00001578204,0.000005187336,0.0006778339],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.783471,"threshold_uncertainty_score":0.3819453,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.2414877066128224,"score_gpt":0.3554903035305996,"score_spread":0.1140025969177772,"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."}}