{
  "paper": {
    "rank": 19,
    "paper_id": "aeraej-149",
    "title": "Adaptation to Environmental Change: Agriculture and the Unexpected Incidence of the Acid Rain Program",
    "authors": "Nicholas J. Sanders; Alan I. Barreca",
    "year": 2022,
    "journal": "American Economic Journal: Economic Policy",
    "doi": "10.1257/pol.20190060",
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    "source_specification": "",
    "selection_stratum": "did_continuous"
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    "assessment_status": "unsupported_design",
    "unsupported": "The main agriculture targets are IV/OLS effects of continuous predicted sulfate exposure. Public binary Phase-1 emissions event studies are supplementary policy figures, not substitutes for the main crop-yield estimand; prepared agricultural analysis panels are missing."
  },
  "status": "unsupported_design",
  "reason": "The main agriculture targets are IV/OLS effects of continuous predicted sulfate exposure. Public binary Phase-1 emissions event studies are supplementary policy figures, not substitutes for the main crop-yield estimand; prepared agricultural analysis panels are missing.",
  "reviewed_at": "2026-10-12",
  "eligibility": {
    "category": "instrumental_variables",
    "decision": "excluded",
    "reason": "The main agriculture targets are IV/OLS effects of continuous predicted sulfate exposure. Public binary Phase-1 emissions event studies are supplementary policy figures, not substitutes for the main crop-yield estimand; prepared agricultural analysis panels are missing."
  },
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    "variable": "SO2_Phase",
    "scope": "Deposited EPA facility-year SO2 phase categories, before aggregation and event-time interactions. CSV trailing empty fields excluded. N=90,710; missing=0. Frame: source_treatment_data. Source: data/power_plants/ARP_data/EPA_facility_data.csv.",
    "variables_counted": 1,
    "specification": "Underlying EPA Acid Rain Program phase classification"
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    "verification_outcome": "verified with blocked rows",
    "code_readiness": "needs_restricted_data",
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}