IPUMS Online Data Analysis System

The IPUMS online analysis system uses high-speed tabulation software developed at UC-Berkeley's Computer-assisted Survey Methods Program. For more information on how to use this tool, please view our guidance on working with data via SDA or view our video tutorial.

In each table below, we include links to analyze the data online, view detailed variable-level documentation through the IPUMS data access system, and access information on the sample and appropriate weights. Please view our guidance on ASEC, BMS and supplement weights.

Annual Social and Economic Supplement (ASEC) Combined Dataset
The ASEC is an annual supplement that collects information on the topics of work, income, tax, poverty, supplemental poverty, migration, disability, health insurance, health insurance unit, summary health insurance, veteran status and welfare.
SDA Dataset	Sample Level Information	Sample Weight(s)
All ASEC samples 1962-Present	ASEC Sample Notes	ASECWT ASECWTH
Considerations when using this multi-year dataset: Analyses should use the YEAR variable if you do not intend to pool all years of ASEC data for your analysis. The person weight for the 2014 ASEC uses the 3/8 file which corresponds to the redesigned income questions. See further information about the 2014 survey redesign.

Basic Monthly Survey (BMS) Combined Dataset
The BMS is a battery of labor force and demographic survey questions that are collected and released on a monthly basis.
SDA Dataset	Sample Level Information	Sample Weight(s)
All BMS samples 1976-Present	BMS Sample Notes	WTFINL HWTFINL
Considerations when using this multi-year dataset: Analyses should use the YEAR and MONTH variable if you do not intend to pool all years and months of BMS data for your analysis. This dataset includes every month of the BMS and only includes 'core' variables which include data on demographics, family interrelationships, ethnicity/nativity, work, education, disability, COVID-19 and telework. Non-core variables not included in this dataset are from BMS supplements, which are available in the table below.

BMS Supplement Combined Datasets
Use the CPS sample selection page and the CPS RoPES tool (supplement calendar) tools information on the timing of different BMS supplements.
SDA Dataset	Supplement Information	Supplement Weight(s) (Available in SDA)	Supplement Variables
Agricultural Worker Supplements	AW Sample Notes	AWSUPPWT	AW Variables
Civic Engagement Supplements	CE Sample Notes	CESUPPWT	CE Variables
Child Support Supplements	CS Sample Notes	CSSUPPWT	CS Variables
Computer and Internet Use Supplements	CI Sample Notes	CIPWT CISUPPWT	CI Variables
Displaced Worker Supplements	DW Sample Notes	DWSUPPWT	DW Variables
Education Supplements	ED Sample Notes	EDSUPPWT	ED Variables
Fertility and Marriage Supplements	FR Sample Notes	FRSUPPWT	FR Variables
Food Security Supplements	FS Sample Notes	FSSUPPWT FSSUPPWTH	P: FS Variables H: FS Variables
Job Tenure Supplements	JT Sample Notes	JTSUPPWT	JT Variables
Public Arts Supplements	PA Sample Notes	PASUPPWT *See Sample Notes*	PA Variables
Tobacco Use Supplements	TB Sample Notes	TBSUPPWT TNRWT TSRWT	TB Variables
Un(der)banked Supplements	UN Sample Notes	UBSUPPWT UBSUPPWTH	P: UB Variables H: UB Variables
Veterans Supplements	VT Sample Notes	VTSUPPWT	VT Variables
Volunteer Supplements	VL Sample Notes	VLSUPPWT	VL Variables
Voter Supplements	VO Sample Notes	VOSUPPWT	VO Variables
Work Schedules Supplement	WS Sample Notes	WSSUPPWT	WS Variables
Considerations when using this multi-year dataset: Analyses should use the YEAR and MONTH variable if you do not intend to pool all years and/or months of supplement data for your analysis. View our guidance on supplement weights. Occasionally multiple CPS supplements are fielded in the same month and year. When selecting a particular supplement to analyze in the SDA, you may therefore also have access to variables from another supplement that was fielded at the same time. Users should use the SDA to analyze variables from just one supplement at a time.