Replication Files for Twins-Based Education Return Study

Comprising replication code and files for a published study on the return to education in the mid-20th century using evidence from twins. The data is restricted and requires approval from IPUMS and NBER for access. The author is James J. Feigenbaum, and the associated study was published in the Journal of Economic History in 2020.

Use Cases

• Run the provided replication code to generate figures and tables for the published study after setting the `project_path` variable.
• Analyze the relationship between education and earnings using the restricted census data, contingent on researcher approval from IPUMS and NBER.
• Study the economic returns to education in the mid-20th century using the twins-based methodology outlined in the replication project.

Strengths

• Replication files are directly associated with a peer-reviewed publication in the Journal of Economic History (2020).
• The underlying data source is the complete count census, a high-quality and detailed historical record.
• The project includes all necessary code to regenerate the study's analytical outputs.

Limitations

• The primary census data is restricted and not included; access requires a separate approval process from IPUMS and NBER.
• The dataset's size, row count, column structure, and specific variables are unknown from the provided description.
• The replication files are dependent on external, restricted data that may not be accessible to all users.

Provenance

Source

ICPSR Harvested Dataverse, associated with author James J. Feigenbaum.

Collection Method

Replication files for a published academic study; primary data is from the complete count census accessed via NBER.

Time Range

Mid-20th century (specific years not provided).

Freshness

The replication files were last updated on 2026-02-23.

Geography

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