Original collectionUnder development

Under development — library extension. This report is part of the expanded-library work, not the original collection. Source preparation, methods and results are subject to revision.

Provisional eligibility assessment — under development. Deep DiD follow-up: The binary ever-installed group is interacted with installation-relative time, with boiler and year effects. Earlier lines 241–278 define actual installation and never-treated timing. Outcome preparation carries forward sparse early emissions and fills missing emissions with zero; preserve and disclose these authored conventions rather than silently using raw annual outcomes. This working assessment is not fully vetted and may change. See the report below for its recorded replication or assessment status. Provisional eligibility log

Adaptation to Environmental Change: Agriculture and the Unexpected Incidence of the Acid Rain Program

Nicholas J. Sanders; Alan I. Barreca (2022). American Economic Journal: Economic Policy.

Under development — community extension. This is a provisional source-design assessment, not a new successful replication or a final eligibility ruling.

Extension index · Provisional eligibility log · Assessment JSON · QMD · Reproduction code

Source design and template applicability

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.

No DiD estimates, uncertainty intervals or homogeneity-test decision were computed in this tranche. No point is added to the calibration plots. This is not a zero effect or a failed statistical test.

Recorded treatment-column measurement

5 distinct nonmissing values in SO2_Phase.

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.

These are the existing data-measured counts, not counts inferred from design labels. A binary instrument, group indicator or interaction component need not be the treatment of interest; the source-design assessment above takes precedence for template applicability.

Replication status

This tranche: unsupported design; source code/documentation inspected, no estimator run.

Supplied library: partial; verification: verified with blocked rows; preparation: needs_restricted_data. These are the library’s labels, not new verification claims. Missing data and unsupported designs are separate issues.

Evidence and provenance

The following files in the supplied library were inspected. Their SHA-256 digests are recorded in the downloadable assessment JSON. Source archives and microdata are not redistributed.

• AEJ-Policy/Sanders_Barreca_AEJ-Policy_2022_128541/R/149_sanders_barreca_replicate.R (209 lines)
• AEJ-Policy/Sanders_Barreca_AEJ-Policy_2022_128541/verdict.md (118 lines)
• AEJ-Policy/Sanders_Barreca_AEJ-Policy_2022_128541/aeraej-149.md (229 lines)