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title: "Labor Drops: Experimental Evidence on the Return to Additional Labor in Microenterprises"
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[Suresh de Mel; David McKenzie; Christopher Woodruff (2019)](https://doi.org/10.1257/app.20170497). *American Economic Journal: Applied Economics*.

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

[Extension index](development.html) · [Provisional eligibility log](development.html#eligibility-log) · [Assessment JSON](aeraej-535.json) · [QMD](aeraej-535.qmd) · [Reproduction code](collection-code.zip)

## Source design and template applicability

The wage-subsidy voucher is randomly assigned. Voucher-by-round dynamic effects remain experimental even though the data contain pre/during/post periods and firm effects.

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

**2 distinct nonmissing values** in `treatment`.

Observed support in the indicated source frame; missing values excluded. N=4,879; missing=0. Frame: selected_source_data. Source: AEJ-Applied/de_Mel_McKenzie_Woodruff_AEJ-Applied_2019_113732/R/535_demel_mckenzie_woodruff_replicate.R.

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.

- `AEJ-Applied/de_Mel_McKenzie_Woodruff_AEJ-Applied_2019_113732/R/535_demel_mckenzie_woodruff_figure.R` (95 lines)
- `AEJ-Applied/de_Mel_McKenzie_Woodruff_AEJ-Applied_2019_113732/R/535_demel_mckenzie_woodruff_replicate.R` (281 lines)
- `AEJ-Applied/de_Mel_McKenzie_Woodruff_AEJ-Applied_2019_113732/verdict.md` (76 lines)
- `AEJ-Applied/de_Mel_McKenzie_Woodruff_AEJ-Applied_2019_113732/aeraej-535.md` (89 lines)