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: Code has binary expansion vert_exp x common binary output-cut sotan in Poisson with half-year effects, not firm FE. vert_exp denotes current expansion (not fixed ownership); both group composition and output cuts change. This supports the source specialized comparison, not an absorbing-adoption ATT. Do not strip the link function or add firm effects and call it replication. This working assessment is not fully vetted and may change. See the report below for its recorded replication or assessment status. Provisional eligibility log

Product Innovation, Product Diversification, and Firm Growth: Evidence from Japan’s Early Industrialization

Serguey Braguinsky; Atsushi Ohyama; Tetsuji Okazaki; Chad Syverson (2021). American Economic Review.

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

num_exper_upgrades_st_cum is a cumulative count of machine-upgrade trials. The firm/semiannual fixed-effects coefficient is a dose effect, not binary adoption.

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

13 distinct nonmissing values in num_exper_upgrades_st_cum.

Observed support in the indicated source frame; missing values excluded. N=2,135; missing=0. Frame: selected_source_data. Source: /Volumes/LAL_BAK/did-cardinality-work/packages/Braguinsky_Ohyama_Okazaki_Syverson_AER_2021_145421/Final-data-and-programs/main_data.dta.

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: verified; verification: verified; preparation: runs_with_shim. 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.

• AER/Braguinsky_Ohyama_Okazaki_Syverson_AER_2021_145421/R/217_braguinsky_etal_figure.R (84 lines)
• AER/Braguinsky_Ohyama_Okazaki_Syverson_AER_2021_145421/R/217_braguinsky_etal_replicate.R (234 lines)
• AER/Braguinsky_Ohyama_Okazaki_Syverson_AER_2021_145421/verdict.md (57 lines)
• AER/Braguinsky_Ohyama_Okazaki_Syverson_AER_2021_145421/aeraej-217.md (170 lines)