DOI: 10.3886/icpsr03894.v2
title: Survey of Income and Program Participation (SIPP) 2001 Panel
title: Version 2

description: This data collection is part of a longitudinal survey
designed to provide detailed information on the economic situation of
households and persons in the United States. These data examine the
distribution of income, wealth, and poverty in American society and
gauge the effects of federal and state programs on the well-being of
families and individuals.
There are three basic elements contained in the survey. The
first is a control card that records basic social and demographic
characteristics for each person in a household, as well as changes in
such characteristics over the course of the interviewing period. These
include age, sex, race, ethnic origin, marital status, household
relationship, education, and veteran status. Limited data are provided
on housing unit characteristics such as units in structure, tenure,
access, and complete kitchen facilities. The second element is the core
portion of the questionnaire, with questions repeated at each interview
on labor force activity, types and amounts of income, and participation
in various cash and noncash benefit programs for each month of the four-
month reference period. Data for employed persons include number of
hours and weeks worked, earnings, and weeks without a job. Nonworkers
are classified as unemployed or not in the labor force. In addition to
providing income data associated with labor force activity, the core
questions cover nearly 50 other types of income. Core data also include
postsecondary school attendance, public or private subsidized rental
housing, low-income energy assistance, and school breakfast and lunch
participation. The third element consists of topical modules, which are
a series of supplemental questions asked during selected household
visits. Topical modules include some core data to link individuals to
the core files.

The Wave 1 Topical Module covers recipiency and employment
history.
The Wave 2 Topical Module includes work disability, education
and training, marital, migration, and fertility histories, and
household relationships.
The Wave 3 Topical Module covers medical expenses and
utilization of health care, work-related expenses and child support,
assets and liabilities, real estate, shelter costs, dependent care,
vehicles, value of business, interest earning accounts, rental
properties, stocks and mutual fund shares, mortgages, and other
assets.
The Wave 4 Topical Module covers work schedule, taxes,
child care, and annual income and retirement accounts.
Data in the Wave 5 Topical Module describe child support
agreements, school enrollment and financing, support for non-household
members, adult and child disability, and employer-provided health
benefits.
The Wave 6 Topical Module covers medical expenses and
utilization of health care, work related expenses, child support
paid and child care poverty, assets and liabilities, real estate,
shelter costs, dependent care, vehicles, value of business,
interest earning accounts, rental properties, stock and mutual
fund shares, mortgages, and other financial investments.
The Wave 7 Topical Module covers informal caregiving,
children's well-being, and annual income and retirement
accounts.
The Wave 8 Topical Module and Wave 8 Welfare Reform Topical
Module cover child support agreements, support for nonhousehold
members, adult disability, child disability, adult well-being, and
welfare reform.
The Wave 9 Topical Module covers medical expenses and
utilization of heath care (adults and children), work related
expenses, child support paid and child care poverty, assets and
liabilities, real estate, shelter costs, dependent care, vehicles,
value of business, interest earnings accounts, rental properties,
stocks and mutual fund shares mortgages, and other financial
investments
description: A multistage stratified sampling design was used.
 One-fourth of the sample households were interviewed each month, and
 households were interviewed at four-month intervals. All persons at
 least 15 years old who were present as household members at the time
 of the first interview were included for the entire study, except
 those who joined the military, were institutionalized for the entire
 study period, or moved from the United States. Original household
 members who moved during the study period were followed to their new
 residences and interviewed there. New persons moving into households
 of members of the original sample were also included in the survey,
 but were not followed if they left the household of an original sample
person.
description: Datasets: 
DS0: Study-Level Files
DS1: Wave 1 Core Microdata File
DS2: Wave 1 Topical Module Microdata File
DS3: Wave 2 Core Microdata File
DS4: Wave 2 Topical Module Microdata File
DS5: Wave 3 Core Microdata File
DS6: Wave 3 Topical Module Microdata File
DS7: Wave 4 Core Microdata File
DS8: Wave 4 Topical Module Microdata File
DS9: Wave 5 Core Microdata File
DS10: Wave 5 Topical Module Microdata File
DS11: Wave 6 Core Microdata File
DS12: Wave 6 Topical Module Microdata File
DS13: Wave 7 Core Microdata File
DS14: Wave 7 Topical Module Microdata File
DS15: Wave 8 Core Microdata File
DS16: Wave 8 Topical Module Microdata File
DS17: Wave 8 Welfare Reform Topical Module Research Microdata File
DS18: Wave 9 Core Microdata File
DS19: Wave 9 Topical Module Microdata File
description: The resident population of the United States, excluding
persons living in institutions and military barracks.