1{"text": "{\"genre\":\"empirical\",\"subfield\":\"asset_pricing\",\"subfield_secondary\":\"commodity futures / financial_intermediation\",\"primary_method\":\"reduced_form_regression\",\"identification\":{\"estimand\":\"Predictive relation between lagged basis-momentum and subsequent commodity nearby/spreading returns, plus the factor risk premium on basis-momentum exposure\",\"strategy\":\"Univariate and double portfolio sorts, pooled predictive regressions with fixed effects, time-series spanning regressions against benchmark factor models, and cross-sectional asset pricing tests on portfolios and individual commodities; competing explanations assessed through conditioning and interaction tests\",\"key_assumptions\":[\"Characteristic is observable ex ante, so predictive regressions avoid look-ahead bias\",\"Test assets and benchmark factor models are appropriate for the cross-sectional pricing tests\",\"Proxies for volatility, liquidity, intermediary capital and trader positions capture the intended economic channels\"],\"threats_addressed\":[\"Effect subsumed by basis, momentum or volatility characteristics\",\"Storage/inventory explanation (double sorts, non-storable financial assets)\",\"Hedging pressure explanation\",\"Transaction costs\",\"Sensitivity across maturities and portfolio composition\"],\"causal_language_strength\":2,\"uses_causal_claim\":false},\"abstract_moves\":{\"question\":{\"present\":false,\"sentence_index\":-1},\"gap\":{\"present\":false,\"sentence_index\":-1},\"method\":{\"present\":true,\"sentence_index\":0},\"results\":{\"present\":true,\"sentence_index\":1},\"magnitude\":{\"present\":false,\"sentence_index\":-1},\"contribution\":{\"present\":true,\"sentence_index\":0}},\"introduction\":{\"moves\":[{\"paragraph_index\":0,\"move\":\"preview_of_approach\"},{\"paragraph_index\":0,\"move\":\"preview_of_results\"},{\"paragraph_index\":0,\"move\":\"motivation\"},{\"paragraph_index\":0,\"move\":\"mechanism_or_theory_sketch\"},{\"paragraph_index\":1,\"move\":\"contribution_statement\"},{\"paragraph_index\":1,\"move\":\"related_literature_positioning\"},{\"paragraph_index\":1,\"move\":\"preview_of_results\"},{\"paragraph_index\":2,\"move\":\"contribution_statement\"},{\"paragraph_index\":2,\"move\":\"related_literature_positioning\"},{\"paragraph_index\":2,\"move\":\"preview_of_results\"},{\"paragraph_index\":3,\"move\":\"mechanism_or_theory_sketch\"},{\"paragraph_index\":3,\"move\":\"preview_of_approach\"},{\"paragraph_index\":4,\"move\":\"preview_of_results\"},{\"paragraph_index\":4,\"move\":\"contribution_statement\"}],\"contribution_paragraph_index\":1,\"contribution_types\":[\"new_data_or_measure\",\"new_evidence\"],\"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\":\"robustness\"},{\"idx\":6,\"role\":\"conclusion\"},{\"idx\":7,\"role\":\"appendix\"}],\"results_presentation\":{\"economic_significance_discussed\":true,\"statistical_significance_language\":\"stars_and_tstats\",\"magnitude_statements_in_intro\":true},\"robustness\":{\"location\":\"internet_appendix\",\"types\":[\"alternative_specification\",\"subsample\",\"alternative_measure\",\"other\"]},\"tables\":{\"convention_notes\":\"Table notes define each characteristic by formula, specify panels for nearby versus spreading returns, describe the portfolio construction (e.g., High4-minus-Low4, median splits) and report t-statistics in parentheses. 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It then tests whether the characteristic is a priced factor using spanning and cross-sectional asset pricing tests. Next, it adjudicates among competing economic explanations: storage, hedging pressure, volatility, liquidity, intermediary and downside risk, rejecting the classical theories in favor of a speculator/intermediary risk channel. Extensions are relegated to an internet appendix. The introduction is organized as three numbered contributions.\",\"writing_profile_keywords\":[\"new characteristic\",\"factor pricing\",\"commodity futures\",\"competing explanations\",\"numbered contributions\",\"horse race against benchmarks\",\"risk-based interpretation\"],\"confidence\":0.85,\"notes\":\"No figures. Standard-error method is not visible in the table excerpts. 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