DOI: 10.3886/icpsr02917.v2
title: Survey of Program Dynamics (SPD), 1998: Public Use File
title: Version 2

description: The Survey of Program Dynamics (SPD) provides estimates of
 the economic status and activities of the population of the United
 States. SPD provides monthly labor force data and, in addition,
 supplies supplemental data on work experience, income, and noncash
 benefits. Comprehensive work experience information is given on the
 employment status, occupation, and industry of persons 15 years old
 and older, as well as weeks worked and hours per week worked, reasons
 for not working full-time, total income, and income components.
 Information is available not only for persons currently in the labor
 force but also for those who are outside the labor force. Variables
 cover unemployed respondents' current desire for work, their past work
 experience, and their intentions for job-seeking. SPD also provides
 data covering nine noncash income sources: food stamps, school lunch
 programs, employer-provided group health insurance plans,
 employer-provided pension plans, personal health insurance, Medicaid,
 Medicare, CHAMPUS or military health care, and energy assistance. Basic
 demographic, social, and economic characteristics are supplied for each
 member of the household surveyed, including age, sex, race, ethnic
 origin, marital status, household relationship, education, and veteran
 status. Limited data are provided on housing unit characteristics, such
as number of units in structure and tenure.
description: The SURVEY OF PROGRAM DYNAMICS (SPD), 1997: BRIDGE SURVEY
 (ICPSR 2797) interviewed approximately 29,619 households from retired
 1992 and 1993 Survey of Income and Program Participation (SIPP)
 panels, which were scientifically selected on the basis of area of
 residence to represent the nation as a whole. From the households
 interviewed in 1997, a subsample of 19,129 households was selected for
 the continuing sample. Low-income households and households with
 children were selected with certainty or near certainty. Middle- and
 high-income households without children had a 1-in-4 chance of being
selected for the sample.
description: Datasets: 
DS0: Study-Level Files
DS1: Main Data File
DS2: Codebook, Volume I
DS3: Codebook, Volume II
DS4: Codebook, Volume III
description: Population of the United States, including children, who
 resided in civilian and military households and in group quarters in
 March 1992 and March 1993, except those living in military barracks
and institutions such as prisons and nursing homes.
description: (1) The 1998 SPD is an unedited file. It is intended
 as an experimental file to allow experienced users to conduct
 longitudinal analyses by matching to the SURVEY OF PROGRAM DYNAMICS
 (SPD), 1997: BRIDGE SURVEY (ICPSR 2797) and the SURVEY OF INCOME AND
 PROGRAM PARTICIPATION (SIPP) 1992 PANEL (ICPSR 2037) and 1993 PANEL
 (ICPSR 2421) longitudinal files on the following keys at the person
 level: SIPP panel number, sample unit identification number, person
 number, and entry ID (SIPP_PNL, PP_ID, PP_PNUM, and PP_ENTRY). (2) The
 1998 SPD file is a rectangular person-level file with household
 variables included on each person record (there are no family-level
 variables in the file). In contrast, the 1997 SPD Bridge file was
 structured as a hierarchical file. (3) The database dictionary is
 provided as an ASCII text file, and the codebook is provided by the
 principal investigator as a Portable Document Format (PDF) file. The
 PDF file format was developed by Adobe Systems Incorporated and can be
 accessed using PDF reader software, such as the Adobe Acrobat
 Reader. Information on how to obtain a copy of the Acrobat Reader is
provided on the ICPSR Web site.