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Mechanism is inspected with trader-level data and narrative evidence.",28 "key_assumptions": [29 "Parallel trends in trade shares between Le Havre coffee and control harbors/commodities absent the CCP",30 "Timing of CLAM creation was not driven by anticipated trade-flow changes",31 "Control commodities are unaffected by central clearing"32 ],33 "threats_addressed": [34 "Pre-trends in Le Havre trade flows",35 "Anticipation by traders, argued against through the contemporaneous debate",36 "Alternative mechanisms, discussed in a dedicated subsection",37 "Generalizability, checked with other commodities"38 ],39 "causal_language_strength": 4,40 "uses_causal_claim": true41 },42 "abstract_moves": {43 "question": {44 "present": true,45 "sentence_index": 046 },47 "gap": {48 "present": false,49 "sentence_index": -150 },51 "method": {52 "present": true,53 "sentence_index": 254 },55 "results": {56 "present": true,57 "sentence_index": 258 },59 "magnitude": {60 "present": false,61 "sentence_index": -162 },63 "contribution": {64 "present": false,65 "sentence_index": -166 }67 },68 "introduction": {69 "moves": [70 {71 "paragraph_index": 0,72 "move": "motivation"73 },74 {75 "paragraph_index": 0,76 "move": "literature_gap"77 },78 {79 "paragraph_index": 1,80 "move": "preview_of_approach"81 },82 {83 "paragraph_index": 1,84 "move": "contribution_statement"85 },86 {87 "paragraph_index": 1,88 "move": "identification_defense"89 },90 {91 "paragraph_index": 2,92 "move": "contribution_statement"93 },94 {95 "paragraph_index": 2,96 "move": "mechanism_or_theory_sketch"97 },98 {99 "paragraph_index": 3,100 "move": "preview_of_results"101 },102 {103 "paragraph_index": 4,104 "move": "preview_of_results"105 }106 ],107 "contribution_paragraph_index": 1,108 "contribution_types": [109 "new_evidence",110 "new_data_or_measure",111 "new_identification"112 ],113 "roadmap_present": false,114 "literature_positioning_location": "inside_introduction"115 },116 "section_roles": [117 {118 "idx": 0,119 "role": "introduction"120 },121 {122 "idx": 1,123 "role": "theory"124 },125 {126 "idx": 2,127 "role": "data"128 },129 {130 "idx": 3,131 "role": "results"132 },133 {134 "idx": 4,135 "role": "results"136 },137 {138 "idx": 5,139 "role": "conclusion"140 }141 ],142 "results_presentation": {143 "economic_significance_discussed": true,144 "statistical_significance_language": "unclear",145 "magnitude_statements_in_intro": true146 },147 "robustness": {148 "location": "within_results",149 "types": [150 "alternative_measure",151 "other"152 ]153 },154 "tables": {155 "convention_notes": "Notes cite the estimating equation number, the sample (e.g., 23 French harbors or country-level samples) and the dependent variable for each column. Descriptive share tables average over the pre-event window 1877–1882. The trader pool table uses two-sample pre/post t-tests.",156 "units_stated_in_notes": true,157 "standard_errors_description": "unclear"158 },159 "figures": {160 "uncertainty_shown": "unclear"161 },162 "conclusion": {163 "bounded_claims": true,164 "policy_implications": true,165 "open_questions": true,166 "restates_contribution": true167 },168 "hedging": {169 "level": "moderate",170 "typical_devices": [171 "'arguably' for the exogeneity claim",172 "'consistent with' framing for mechanism evidence",173 "explicit caveats on external validity to modern mandatory clearing"174 ]175 },176 "claim_evidence": [177 {178 "claim": "Central clearing shifted French trade flows in coffee toward Le Havre",179 "evidence_type": "table",180 "evidence_ref": "Table II, Figure 1"181 },182 {183 "claim": "The effect extends to Europe-wide import shares from France",184 "evidence_type": "table",185 "evidence_ref": "Table V, Figure 2"186 },187 {188 "claim": "Futures volume rose sharply after CLAM creation while the low-quality trader share stayed low, indicating a missing market",189 "evidence_type": "descriptive_statistic",190 "evidence_ref": "Figure 6, Table VII"191 },192 {193 "claim": "New trader share and entry rose and turnover fell after clearing, consistent with mitigated adverse selection",194 "evidence_type": "figure",195 "evidence_ref": "Figures 5 and 7, Table VII"196 },197 {198 "claim": "Results also hold for other commodities",199 "evidence_type": "table",200 "evidence_ref": "Table III"201 }202 ],203 "structural_summary": "The introduction frames contracting innovations as remedies for financial frictions and notes that identifying them is hard. It then presents the 1882 Le Havre CCP as a natural experiment and states two contributions: a causal effect on trade flows and a mechanism. A short theory section yields the hypothesis, followed by historical background and data. The main results use triple-DiD at the French and European levels, supplemented by narrative and consumption evidence. A long mechanism section separates missing-market and adverse-selection channels and alternatives. The conclusion caveats lessons for modern mandatory clearing.",204 "writing_profile_keywords": [205 "economic history",206 "natural experiment",207 "triple difference-in-differences",208 "hand-collected archival data",209 "mechanism decomposition",210 "derivatives clearing",211 "single-author first person"212 ],213 "confidence": 0.8,214 "notes": "The role_rule labels for sections 2 (literature) and 4 (robustness) were overridden: the excerpts show these sections are background/data and mechanism results. Standard error type and significance notation are not visible in the excerpts. Quantitative statements in the introduction include the 8.2% low-quality trader share and the 303% rise in futures volume."215 },216 "deterministic_checks": {217 "roadmap_regex": false,218 "contribution_regex_in_intro": true,219 "magnitude_in_abstract": false,220 "abstract_n_sentences": 6,221 "intro_n_paragraphs": 5,222 "intro_n_words": 918,223 "causal_words_in_abstract": 0,224 "hedge_words_in_abstract": 0,225 "stars_mentioned": false,226 "clustered_se_mentioned": false,227 "internet_appendix_mentioned": false,228 "section_roles_rule": {229 "0": "introduction",230 "1": "theory",231 "2": "literature",232 "3": "other",233 "4": "robustness",234 "5": "conclusion"235 }236 },237 "schema_valid": true,238 "code_version": "87c73cd-dirty"239}