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MLP Crosswalk Files: Version 1.0

[**Version 1.0 deprecated March 2023**]

Data files

The MLP crosswalks contain IDs that link persons between census years. They are intended for use with IPUMS data extracts. See the user guide.

• 1850-1860 Stata
• 1860-1870 Stata
• 1870-1880 Stata
• 1880-1900 Stata
• 1900-1910 Stata
• 1910-1920 Stata
• 1920-1930 Stata
• 1930-1940 Stata

• 1850-1860 CSV
• 1860-1870 CSV
• 1870-1880 CSV
• 1880-1900 CSV
• 1900-1910 CSV
• 1910-1920 CSV
• 1920-1930 CSV
• 1930-1940 CSV

In addition to the HISTIDs needed to perform the linking operation, the version 1.0 crosswalks contain some basic variables to enable you to reduce the size of the file prior to the merge, depending on your population of interest. Using the 1900-1910 crosswalk as an example:

• SERIAL_1900/1910: Household identifier linking the individual to their household in public-use versions of census 1900/1910.
• AGE_1900/1910: Age of the individual according to census 1900/1910.
• SEX_1900/1910: Sex of the individual according to census 1900/1910 (variable codes).
• BPLD_1900/1910: Detailed place of birth of the individual according to census 1900/1910 (variable codes – select "detailed codes" option).
• STATEFIP_1900/1910: State of residence of the individual according to census 1900/1910 (variable codes).
• The variable ROUND indicates whether the case was linked in Step I or Step II of the linking process.
  

Note: the 1880-1900 file inadvertently included women during Step I of the linking process, unlike the other census year pairings. The version 1.1 1880-1900 crosswalk rectifies this discrepancy.

Citation and terms of use

To download these data, you must agree to IPUMS USA terms of use. To check your account status or register to use IPUMS USA, see account options.

1. Redistribution: You will not redistribute the data without permission:

You may not redistribute IPUMS MLP crosswalks. You may not redistribute any data from IPUMS-USA Full Count data that are linked to the MLP crosswalks.

2. Cite both IPUMS MLP and the Full Count IPUMS Ancestry data:

Jonas Helgertz, Steven Ruggles, John Robert Warren, Catherine A. Fitch, Ronald Goeken, J. David Hacker, Matt A. Nelson, Joseph P. Price, Evan Roberts, and Matthew Sobek. IPUMS Multigenerational Longitudinal Panel: Version 1.0 [dataset]. Minneapolis, MN: IPUMS, 2020. https://doi.org/10.18128/D016.V1.0

Steven Ruggles, Catherine A. Fitch, Ronald Goeken, J. David Hacker, Matt A. Nelson, Evan Roberts, Megan Schouweiler, and Matthew Sobek. IPUMS Ancestry Full Count Data: Version 3.0 [dataset]. Minneapolis, MN: IPUMS, 2021. https://doi.org/10.18128/D014.V3.0

Publications and research reports making use of IPUMS USA should be added to our Bibliography.

Contact us

For questions about IPUMS MLP, contact ipumsres@umn.edu.

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