2018 Data User Notes

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2018 Data User Notes

Assets

User Notes

2018 SIPP: Changes to Asset Questions

August 18, 2020

User note concerning changes made to the asset section of the SIPP questionnaire.
User Notes

2018 SIPP: Errors in Debt Allocation Flag Variable Names

September 25, 2023

User note concerning variable names for allocation flags associated with EDEBT_CC, EDEBT_ED, EDEBT_OT, TDEBT_CC, TDEBT_ED, and TDEBT_OT.
User Notes

2018 SIPP: Jointly Held Assets and Unsecured Debts Universes

August 14, 2023

User note concerning the universes for jointly held assets and unsecured debts.
User Notes

2018 SIPP: Metadata for Rental Properties and Other Real Estate

February 11, 2022

User note concerning originally published metadata for rental properties and other real estate owned jointly with a spouse.
User Notes

2018 SIPP: Model-based Imputation of Asset Variables

August 14, 2020

User note concerning changes to the imputation of asset variables.

Attainment

Certifications & Licenses

User Notes

2018 SIPP: Hot Deck Issues for ECERT, EPROCERT, EWHOCERT

User note concerning corrections applied to the hot decks for ECERT, EPROCERT, and EWHOCERT.

Child & Dependent Care

Data Collection

User Notes

2018 SIPP: Inconsistent Estimates Due to Unit Nonresponse

June 08, 2020

User note regarding impact of unit nonresponse rates on 2018 SIPP Estimates.

Demographics

Demographics (language spoken at home)

User Notes

2018 SIPP: ESPEAK Errors Affecting the Other Three Language Variables

User note concerning misclassified ESPEAK observations affecting TLANG1, EHOWWELL, and RLNGISOL.

Disability

Employment

Fertility History

Food Security

User Notes

2018 SIPP: Hot-deck Allocation Error

January 03, 2025

User note concerning 2014-2022 SIPP Food Security hot-deck error.

Health Care

User Notes

2018 SIPP: Health Insurance Premium Expenditure Question Note

December 13, 2022

User note concerning health insurance premium expenditures and Social Security deductions.

Health Insurance

Health Insurance & Expenses

Income Recodes

User Notes

2018 SIPP: THTOTINCT2 Missing Type 2 Income for Unrelated Household Members

July 10, 2024

User note concerning missing Type 2 income for unrelated household members

Language

User Notes

2018 SIPP: Data Issue Concerning ESPEAK and TLANG1

July 10, 2024

User note concerning errors affecting observations of ESPEAK and TLANG1

Marital History

Nativity & Citizenship

User Notes

2018 SIPP: Citizenship Coding Change for American Samoans

August 18, 2020

User not concerning a change in citizenship coding for people born in American Samoa as of the 2018 SIPP.

Poverty & Income

User Notes

2018 SIPP: Social Security Processing Error and its Impact on Poverty

August 14, 2023

User note regarding impact of error affecting calculation of monthly Social Security amounts on poverty rates.

Programs

Residences

Social Security

User Notes

2018 SIPP: Social Security Parent-Child Linkage Variables

July 10, 2024

User note concerning variables that can be used to link children with adults receiving Social Security on behalf of a child.

Uninsured Care

User Notes

2018 SIPP: Processing Error Effects on Uninsured Care

User note concerning effects of processing error in monthly health insurance variables on Uninsured Care.

Page Last Revised - July 24, 2025

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