{"id":"W4407881460","doi":"10.1002/nvsm.70011","title":"Why Larger Signatures on Solicitation Letters Increase Donations","year":2025,"lang":"en","type":"article","venue":"Journal of Philanthropy","topic":"Sharing Economy and Platforms","field":"Business, Management and Accounting","cited_by":2,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Manitoba; University of Winnipeg; University of Ottawa","funders":"Social Sciences and Humanities Research Council of Canada","keywords":"Advertising; Business","routes":{"ca_aff":true,"ca_fund":true,"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":[0.0002635453,0.00008341674,0.0001296561,0.000470873,0.0001155507,0.0001564838,0.0001462952,0.00004142538,0.0002262735],"category_scores_gemma":[0.0001444612,0.00006436435,0.00008688361,0.0002176008,0.00002684255,0.0008086082,0.00002264584,0.0001808298,0.00003283377],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00002559067,"about_ca_system_score_gemma":0.00001689101,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0001038082,"about_ca_topic_score_gemma":0.00003226334,"domain_scores_codex":[0.9994403,0.000004456722,0.0002453259,0.00007477691,0.000127579,0.0001076185],"domain_scores_gemma":[0.9994513,0.00008454738,0.0002636352,0.0000784827,0.000113679,0.000008405786],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"not_applicable","study_design_gemma":"not_applicable","study_design_scores_codex":[0.0002477123,0.0002189388,0.0101606,0.0001002115,0.0001717952,0.00004384315,0.00006230933,0.001856704,0.003616599,0.120649,0.8600494,0.002822952],"study_design_scores_gemma":[0.001553288,0.00003348133,0.06453603,0.0003737996,0.0001465935,0.000007414306,0.0001641145,0.001939568,0.0007642154,0.03495611,0.8952617,0.0002636923],"study_design_candidate":"not_applicable","study_design_consensus":"not_applicable","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9269373,0.0001989992,0.003124313,0.04860203,0.002071045,0.0001310094,0.000004241935,0.00007068617,0.0188604],"genre_scores_gemma":[0.9622294,0.00001431634,0.0001426392,0.03632068,0.001219472,0.000002488819,0.000008106222,0.000009750917,0.00005317652],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.08569288,"threshold_uncertainty_score":0.2624702,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.01186949426303843,"score_gpt":0.2432500038262755,"score_spread":0.2313805095632371,"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."}}