1{"text": "{\"genre\":\"empirical\",\"subfield\":\"corporate_finance\",\"subfield_secondary\":\"shareholder activism / M&A risk arbitrage / corporate governance\",\"primary_method\":\"reduced_form_regression\",\"identification\":{\"estimand\":\"Association between activist arbitrageur involvement and deal outcomes (completion probability, premium revision, duration) and arbitrage returns.\",\"strategy\":\"Cross-sectional regressions comparing activist-involved deals with passive-arbitrage and no-arbitrage control deals. Supplemented by determinants regressions for selection, manual classification of the contributors to deal failure, and CAR/calendar-time portfolio return analysis.\",\"key_assumptions\":[\"Observable deal characteristics capture activists' selection of targets\",\"Passive-arbitrage and no-arbitrage deals form valid comparison groups\"],\"threats_addressed\":[\"Selection of deals by activists (selection effect section)\",\"Attributing deal failure to activists versus other causes (direct manual classification)\",\"Risk adjustment of returns (four-factor model, calendar-time portfolios, deal-characteristic adjustment)\"],\"causal_language_strength\":2,\"uses_causal_claim\":false},\"abstract_moves\":{\"question\":{\"present\":true,\"sentence_index\":0},\"gap\":{\"present\":false,\"sentence_index\":-1},\"method\":{\"present\":false,\"sentence_index\":-1},\"results\":{\"present\":true,\"sentence_index\":2},\"magnitude\":{\"present\":false,\"sentence_index\":-1},\"contribution\":{\"present\":true,\"sentence_index\":3}},\"introduction\":{\"moves\":[{\"paragraph_index\":0,\"move\":\"motivation\"},{\"paragraph_index\":0,\"move\":\"literature_gap\"},{\"paragraph_index\":1,\"move\":\"preview_of_results\"},{\"paragraph_index\":2,\"move\":\"preview_of_results\"},{\"paragraph_index\":3,\"move\":\"preview_of_results\"},{\"paragraph_index\":3,\"move\":\"contribution_statement\"},{\"paragraph_index\":3,\"move\":\"related_literature_positioning\"}],\"contribution_paragraph_index\":3,\"contribution_types\":[\"new_evidence\",\"new_data_or_measure\"],\"roadmap_present\":false,\"literature_positioning_location\":\"inside_introduction\"},\"section_roles\":[{\"idx\":0,\"role\":\"introduction\"},{\"idx\":1,\"role\":\"data\"},{\"idx\":2,\"role\":\"results\"},{\"idx\":3,\"role\":\"results\"},{\"idx\":4,\"role\":\"results\"},{\"idx\":5,\"role\":\"conclusion\"},{\"idx\":6,\"role\":\"appendix\"}],\"results_presentation\":{\"economic_significance_discussed\":true,\"statistical_significance_language\":\"unclear\",\"magnitude_statements_in_intro\":true},\"robustness\":{\"location\":\"mixed\",\"types\":[\"alternative_measure\",\"alternative_specification\"]},\"tables\":{\"convention_notes\":\"Table notes state the sample size and period (2000–2015 deals) and refer readers to the Appendix for variable definitions. They also describe how control samples are constructed and which methodological sources are followed, such as Hsieh–Walkling for identifying passive arbitrageurs and Cao et al. for calendar-time portfolios. Standard-error treatment is not visible in the excerpts.\",\"units_stated_in_notes\":true,\"standard_errors_description\":\"unclear\"},\"figures\":{\"uncertainty_shown\":\"unclear\"},\"conclusion\":{\"bounded_claims\":true,\"policy_implications\":false,\"open_questions\":false,\"restates_contribution\":true},\"hedging\":{\"level\":\"moderate\",\"typical_devices\":[\"'are associated with' phrasing\",\"'appear to play a role'\",\"'conditional on the deals they select'\",\"'suggest'\"]},\"claim_evidence\":[{\"claim\":\"Activists target deals with low premiums and deals exposed to managerial conflicts of interest.\",\"evidence_type\":\"table\",\"evidence_ref\":\"Tables II, III, IV\"},{\"claim\":\"Activist presence is associated with lower completion probability and higher premium revisions (3.4 pp across all deals, 4.3 pp among completed deals).\",\"evidence_type\":\"table\",\"evidence_ref\":\"Table V\"},{\"claim\":\"A negative ISS recommendation is associated with a 21 pp lower probability of deal completion.\",\"evidence_type\":\"none_stated\",\"evidence_ref\":\"Introduction paragraph 1\"},{\"claim\":\"Activist arbitrage earns four-factor CARs of 4.9–5.4% per deal, versus 2.2% for passive arbitrage.\",\"evidence_type\":\"table\",\"evidence_ref\":\"Table VII\"},{\"claim\":\"The calendar-time monthly alpha is 1.60% for activist arbitrage versus 0.51% for passive arbitrage.\",\"evidence_type\":\"table\",\"evidence_ref\":\"Table VIII\"},{\"claim\":\"Deal failures are classified manually by their underlying contributors to assess activists' direct impact.\",\"evidence_type\":\"table\",\"evidence_ref\":\"Table VI\"}],\"structural_summary\":\"The introduction defines the phenomenon and documents its rise, then previews results on ISS's intermediary role, deal outcomes and returns, before positioning the paper within the takeover-governance literature. The data section builds a hand-collected sample of activist events alongside SDC M&A deals and identifies passive arbitrageurs. Three results sections follow: target selection, deal resolution (with a selection-effect discussion and a direct classification of deal failures), and returns (long-only, long-short, calendar-time, and characteristic-adjusted). A brief conclusion restates the findings in hedged terms.\",\"writing_profile_keywords\":[\"phenomenon-defining\",\"first-study claim\",\"hand-collected sample\",\"associational language\",\"returns analysis\",\"governance framing\",\"control-sample comparisons\"],\"confidence\":0.8,\"notes\":\"The section labeled 'Appendix' contains only a pointer to the Internet Appendix. Robustness checks appear within the results sections, and further material is likely in the Internet Appendix. One result is significant at 5%, but the significance notation style is not visible in the excerpts.\"}", "json": {"genre": "empirical", "subfield": "corporate_finance", "subfield_secondary": "shareholder activism / M&A risk arbitrage / corporate governance", "primary_method": "reduced_form_regression", "identification": {"estimand": "Association between activist arbitrageur involvement and deal outcomes (completion probability, premium revision, duration) and arbitrage returns.", "strategy": "Cross-sectional regressions comparing activist-involved deals with passive-arbitrage and no-arbitrage control deals. Supplemented by determinants regressions for selection, manual classification of the contributors to deal failure, and CAR/calendar-time portfolio return analysis.", "key_assumptions": ["Observable deal characteristics capture activists' selection of targets", "Passive-arbitrage and no-arbitrage deals form valid comparison groups"], "threats_addressed": ["Selection of deals by activists (selection effect section)", "Attributing deal failure to activists versus other causes (direct manual classification)", "Risk adjustment of returns (four-factor model, calendar-time portfolios, deal-characteristic adjustment)"], "causal_language_strength": 2, "uses_causal_claim": false}, "abstract_moves": {"question": {"present": true, "sentence_index": 0}, "gap": {"present": false, "sentence_index": -1}, "method": {"present": false, "sentence_index": -1}, "results": {"present": true, "sentence_index": 2}, "magnitude": {"present": false, "sentence_index": -1}, "contribution": {"present": true, "sentence_index": 3}}, "introduction": {"moves": [{"paragraph_index": 0, "move": "motivation"}, {"paragraph_index": 0, "move": "literature_gap"}, {"paragraph_index": 1, "move": "preview_of_results"}, {"paragraph_index": 2, "move": "preview_of_results"}, {"paragraph_index": 3, "move": "preview_of_results"}, {"paragraph_index": 3, "move": "contribution_statement"}, {"paragraph_index": 3, "move": "related_literature_positioning"}], "contribution_paragraph_index": 3, "contribution_types": ["new_evidence", "new_data_or_measure"], "roadmap_present": false, "literature_positioning_location": "inside_introduction"}, "section_roles": [{"idx": 0, "role": "introduction"}, {"idx": 1, "role": "data"}, {"idx": 2, "role": "results"}, {"idx": 3, "role": "results"}, {"idx": 4, "role": "results"}, {"idx": 5, "role": "conclusion"}, {"idx": 6, "role": "appendix"}], "results_presentation": {"economic_significance_discussed": true, "statistical_significance_language": "unclear", "magnitude_statements_in_intro": true}, "robustness": {"location": "mixed", "types": ["alternative_measure", "alternative_specification"]}, "tables": {"convention_notes": "Table notes state the sample size and period (2000–2015 deals) and refer readers to the Appendix for variable definitions. They also describe how control samples are constructed and which methodological sources are followed, such as Hsieh–Walkling for identifying passive arbitrageurs and Cao et al. for calendar-time portfolios. Standard-error treatment is not visible in the excerpts.", "units_stated_in_notes": true, "standard_errors_description": "unclear"}, "figures": {"uncertainty_shown": "unclear"}, "conclusion": {"bounded_claims": true, "policy_implications": false, "open_questions": false, "restates_contribution": true}, "hedging": {"level": "moderate", "typical_devices": ["'are associated with' phrasing", "'appear to play a role'", "'conditional on the deals they select'", "'suggest'"]}, "claim_evidence": [{"claim": "Activists target deals with low premiums and deals exposed to managerial conflicts of interest.", "evidence_type": "table", "evidence_ref": "Tables II, III, IV"}, {"claim": "Activist presence is associated with lower completion probability and higher premium revisions (3.4 pp across all deals, 4.3 pp among completed deals).", "evidence_type": "table", "evidence_ref": "Table V"}, {"claim": "A negative ISS recommendation is associated with a 21 pp lower probability of deal completion.", "evidence_type": "none_stated", "evidence_ref": "Introduction paragraph 1"}, {"claim": "Activist arbitrage earns four-factor CARs of 4.9–5.4% per deal, versus 2.2% for passive arbitrage.", "evidence_type": "table", "evidence_ref": "Table VII"}, {"claim": "The calendar-time monthly alpha is 1.60% for activist arbitrage versus 0.51% for passive arbitrage.", "evidence_type": "table", "evidence_ref": "Table VIII"}, {"claim": "Deal failures are classified manually by their underlying contributors to assess activists' direct impact.", "evidence_type": "table", "evidence_ref": "Table VI"}], "structural_summary": "The introduction defines the phenomenon and documents its rise, then previews results on ISS's intermediary role, deal outcomes and returns, before positioning the paper within the takeover-governance literature. The data section builds a hand-collected sample of activist events alongside SDC M&A deals and identifies passive arbitrageurs. Three results sections follow: target selection, deal resolution (with a selection-effect discussion and a direct classification of deal failures), and returns (long-only, long-short, calendar-time, and characteristic-adjusted). A brief conclusion restates the findings in hedged terms.", "writing_profile_keywords": ["phenomenon-defining", "first-study claim", "hand-collected sample", "associational language", "returns analysis", "governance framing", "control-sample comparisons"], "confidence": 0.8, "notes": "The section labeled 'Appendix' contains only a pointer to the Internet Appendix. Robustness checks appear within the results sections, and further material is likely in the Internet Appendix. One result is significant at 5%, but the significance notation style is not visible in the excerpts."}, "model": "claude-opus-5-5", "stop_reason": "end_turn", "latency_s": 16.67, "usage": {"input": 6688, "output": 2040, "cache_read": 3968, "cache_write": 0}, "cost_usd": 0.068346, "request_id": "req_011Cggq83S8BAPiaB23GCfXq", "cached": false, "ts": "2026-11-03T23:04:22+00:00", "effort": "medium"}