{"text": "{\"genre\":\"empirical\",\"subfield\":\"asset_pricing\",\"subfield_secondary\":\"market_microstructure\",\"primary_method\":\"reduced_form_regression\",\"identification\":{\"estimand\":\"Incremental share of variation in corporate bond yield spread changes, and in their common unexplained component, accounted for by systematic OTC friction proxies\",\"strategy\":\"Bond-by-bond time-series regressions extending the CDGM structural-variable model with marketwide proxies for inventory, search and bargaining frictions; principal component analysis of residuals to assess the common factor\",\"key_assumptions\":[\"Constructed proxies capture the intensity of systematic inventory, search and bargaining frictions\",\"CDGM structural variables adequately control for fundamental drivers\"],\"threats_addressed\":[\"stale dealer quotes, handled by using transaction prices\",\"crisis-period dominance, handled by excluding the crisis\",\"other potential drivers of yield spread changes\",\"alternative definitions of CDGM variables\"],\"causal_language_strength\":2,\"uses_causal_claim\":false},\"abstract_moves\":{\"question\":{\"present\":true,\"sentence_index\":0},\"gap\":{\"present\":true,\"sentence_index\":0},\"method\":{\"present\":true,\"sentence_index\":1},\"results\":{\"present\":true,\"sentence_index\":1},\"magnitude\":{\"present\":true,\"sentence_index\":1},\"contribution\":{\"present\":true,\"sentence_index\":4}},\"introduction\":{\"moves\":[{\"paragraph_index\":0,\"move\":\"motivation\"},{\"paragraph_index\":0,\"move\":\"tension_or_puzzle\"},{\"paragraph_index\":0,\"move\":\"preview_of_approach\"},{\"paragraph_index\":0,\"move\":\"preview_of_results\"},{\"paragraph_index\":1,\"move\":\"mechanism_or_theory_sketch\"},{\"paragraph_index\":1,\"move\":\"preview_of_results\"},{\"paragraph_index\":2,\"move\":\"mechanism_or_theory_sketch\"},{\"paragraph_index\":2,\"move\":\"preview_of_results\"},{\"paragraph_index\":3,\"move\":\"preview_of_results\"},{\"paragraph_index\":4,\"move\":\"related_literature_positioning\"},{\"paragraph_index\":5,\"move\":\"related_literature_positioning\"},{\"paragraph_index\":6,\"move\":\"roadmap\"}],\"contribution_paragraph_index\":0,\"contribution_types\":[\"new_evidence\",\"new_data_or_measure\"],\"roadmap_present\":true,\"literature_positioning_location\":\"inside_introduction\"},\"section_roles\":[{\"idx\":0,\"role\":\"introduction\"},{\"idx\":1,\"role\":\"data\"},{\"idx\":2,\"role\":\"empirical_design\"},{\"idx\":3,\"role\":\"data\"},{\"idx\":4,\"role\":\"results\"},{\"idx\":5,\"role\":\"conclusion\"}],\"results_presentation\":{\"economic_significance_discussed\":true,\"statistical_significance_language\":\"unclear\",\"magnitude_statements_in_intro\":true},\"robustness\":{\"location\":\"mixed\",\"types\":[\"alternative_sample_period\",\"alternative_specification\",\"alternative_measure\"]},\"tables\":{\"convention_notes\":\"Notes spell out the regression equation and its variable vectors, the sample filter (bonds with at least 25 monthly observations) and the data source and period. Results come from bond-level regressions summarized across bonds.\",\"units_stated_in_notes\":true,\"standard_errors_description\":\"unclear\"},\"figures\":{\"uncertainty_shown\":\"no\"},\"conclusion\":{\"bounded_claims\":true,\"policy_implications\":false,\"open_questions\":false,\"restates_contribution\":true},\"hedging\":{\"level\":\"moderate\",\"typical_devices\":[\"'consistent with' theory\",\"'suggests'/'indicates'\",\"'associated with'\",\"'support the implications of'\"]},\"claim_evidence\":[{\"claim\":\"Systematic inventory, search and bargaining frictions explain 23.4% of the variation in the common component of yield spread changes\",\"evidence_type\":\"table\",\"evidence_ref\":\"Table IX\"},{\"claim\":\"The CDGM model on transaction prices leaves a large common unexplained factor\",\"evidence_type\":\"table\",\"evidence_ref\":\"Tables II, III\"},{\"claim\":\"Higher interdealer network connectivity and longer intermediation chains are associated with narrower yield spreads\",\"evidence_type\":\"table\",\"evidence_ref\":\"Table VII\"},{\"claim\":\"Search frictions capture 6.3% of the common component\",\"evidence_type\":\"table\",\"evidence_ref\":\"Table VII\"},{\"claim\":\"Results hold when the crisis period is excluded\",\"evidence_type\":\"table\",\"evidence_ref\":\"Table X\"}],\"structural_summary\":\"The paper opens with the puzzle of a large unexplained common factor in yield spread changes and introduces OTC friction theory as a candidate explanation. It then previews the friction proxies and results, theory by theory, and positions itself against the liquidity and market-making literatures. The body describes the TRACE data, replicates the CDGM benchmark, and constructs systematic friction measures. It then tests each friction group separately and jointly, followed by robustness checks. A brief conclusion restates the key magnitudes.\",\"writing_profile_keywords\":[\"puzzle-driven\",\"benchmark replication\",\"theory-guided proxies\",\"explained variance\",\"OTC frictions\",\"network measures\"],\"confidence\":0.8,\"notes\":\"Sections III and IV are labelled 'other' by the role rule; Section III is mainly measure construction, so it is coded as data. Standard error conventions are not visible in the table notes.\"}", "json": {"genre": "empirical", "subfield": "asset_pricing", "subfield_secondary": "market_microstructure", "primary_method": "reduced_form_regression", "identification": {"estimand": "Incremental share of variation in corporate bond yield spread changes, and in their common unexplained component, accounted for by systematic OTC friction proxies", "strategy": "Bond-by-bond time-series regressions extending the CDGM structural-variable model with marketwide proxies for inventory, search and bargaining frictions; principal component analysis of residuals to assess the common factor", "key_assumptions": ["Constructed proxies capture the intensity of systematic inventory, search and bargaining frictions", "CDGM structural variables adequately control for fundamental drivers"], "threats_addressed": ["stale dealer quotes, handled by using transaction prices", "crisis-period dominance, handled by excluding the crisis", "other potential drivers of yield spread changes", "alternative definitions of CDGM variables"], "causal_language_strength": 2, "uses_causal_claim": false}, "abstract_moves": {"question": {"present": true, "sentence_index": 0}, "gap": {"present": true, "sentence_index": 0}, "method": {"present": true, "sentence_index": 1}, "results": {"present": true, "sentence_index": 1}, "magnitude": {"present": true, "sentence_index": 1}, "contribution": {"present": true, "sentence_index": 4}}, "introduction": {"moves": [{"paragraph_index": 0, "move": "motivation"}, {"paragraph_index": 0, "move": "tension_or_puzzle"}, {"paragraph_index": 0, "move": "preview_of_approach"}, {"paragraph_index": 0, "move": "preview_of_results"}, {"paragraph_index": 1, "move": "mechanism_or_theory_sketch"}, {"paragraph_index": 1, "move": "preview_of_results"}, {"paragraph_index": 2, "move": "mechanism_or_theory_sketch"}, {"paragraph_index": 2, "move": "preview_of_results"}, {"paragraph_index": 3, "move": "preview_of_results"}, {"paragraph_index": 4, "move": "related_literature_positioning"}, {"paragraph_index": 5, "move": "related_literature_positioning"}, {"paragraph_index": 6, "move": "roadmap"}], "contribution_paragraph_index": 0, "contribution_types": ["new_evidence", "new_data_or_measure"], "roadmap_present": true, "literature_positioning_location": "inside_introduction"}, "section_roles": [{"idx": 0, "role": "introduction"}, {"idx": 1, "role": "data"}, {"idx": 2, "role": "empirical_design"}, {"idx": 3, "role": "data"}, {"idx": 4, "role": "results"}, {"idx": 5, "role": "conclusion"}], "results_presentation": {"economic_significance_discussed": true, "statistical_significance_language": "unclear", "magnitude_statements_in_intro": true}, "robustness": {"location": "mixed", "types": ["alternative_sample_period", "alternative_specification", "alternative_measure"]}, "tables": {"convention_notes": "Notes spell out the regression equation and its variable vectors, the sample filter (bonds with at least 25 monthly observations) and the data source and period. Results come from bond-level regressions summarized across bonds.", "units_stated_in_notes": true, "standard_errors_description": "unclear"}, "figures": {"uncertainty_shown": "no"}, "conclusion": {"bounded_claims": true, "policy_implications": false, "open_questions": false, "restates_contribution": true}, "hedging": {"level": "moderate", "typical_devices": ["'consistent with' theory", "'suggests'/'indicates'", "'associated with'", "'support the implications of'"]}, "claim_evidence": [{"claim": "Systematic inventory, search and bargaining frictions explain 23.4% of the variation in the common component of yield spread changes", "evidence_type": "table", "evidence_ref": "Table IX"}, {"claim": "The CDGM model on transaction prices leaves a large common unexplained factor", "evidence_type": "table", "evidence_ref": "Tables II, III"}, {"claim": "Higher interdealer network connectivity and longer intermediation chains are associated with narrower yield spreads", "evidence_type": "table", "evidence_ref": "Table VII"}, {"claim": "Search frictions capture 6.3% of the common component", "evidence_type": "table", "evidence_ref": "Table VII"}, {"claim": "Results hold when the crisis period is excluded", "evidence_type": "table", "evidence_ref": "Table X"}], "structural_summary": "The paper opens with the puzzle of a large unexplained common factor in yield spread changes and introduces OTC friction theory as a candidate explanation. It then previews the friction proxies and results, theory by theory, and positions itself against the liquidity and market-making literatures. The body describes the TRACE data, replicates the CDGM benchmark, and constructs systematic friction measures. It then tests each friction group separately and jointly, followed by robustness checks. A brief conclusion restates the key magnitudes.", "writing_profile_keywords": ["puzzle-driven", "benchmark replication", "theory-guided proxies", "explained variance", "OTC frictions", "network measures"], "confidence": 0.8, "notes": "Sections III and IV are labelled 'other' by the role rule; Section III is mainly measure construction, so it is coded as data. Standard error conventions are not visible in the table notes."}, "model": "claude-opus-5-5", "stop_reason": "end_turn", "latency_s": 15.15, "usage": {"input": 7427, "output": 1849, "cache_read": 3968, "cache_write": 0}, "cost_usd": 0.067482, "request_id": "req_011CggqbdrpRSgxehFaNq2LC", "cached": false, "ts": "2026-11-03T23:10:35+00:00", "effort": "medium"}