1 An Overview Gregory D. Weyland Current Population Survey (CPS)
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Transcript of 1 An Overview Gregory D. Weyland Current Population Survey (CPS)
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An Overview
Gregory D. Weyland
Current Population Survey (CPS)
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Current Population Survey
• Purpose and Uses
– Monthly Labor Force Data
– Supplements
• Annual Social and EConomic Survey (ASEC)
• Other Supplements
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Current Population Survey
• Basic CPS Information– Unemployment Rate– Hours Worked/Absent– Reasons for Absence– Full-Time/Part-Time– Industry and Occupation– Job Search Methods– Usual Weekly Earnings– Union Membership
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Current Population Survey
• ASEC Data
– Income
– Poverty
– Health Insurance
– Other Reports
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Current Population Survey
• Other Supplements– January Displaced Workers
– April Child Support
– June Fertility
– August Veterans
– September Volunteers
– October School Enrollment
– November Voting and Registration
– December Food Security
– Other Topics as appropriate
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Current Population Survey
• Sample Design
– Rotation Pattern
– Sample Sources
– State Based Sample
– PSU Creation and Selection
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Current Population Survey
• Rotation Pattern
– 4-8-4 Pattern– In sample for 4 consecutive months this year– Off 8 months– In for the same 4 months next year– 75 percent month-to-month overlap– 50 percent year-to-year overlap
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Current Population Survey
• Sample Sources
– Address Lists
– Area Mapping Operation
– New Construction (Building Permits)
– Special Places
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Current Population Survey
• State Based Sample Design
– 53 Separate Samples• 48 States• District of Columbia• New York
– New York City– Balance of State
• California– Los Angeles County– Balance of State
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Current Population Survey
• PSU (Primary Sampling Units) Creation and Selection– Like Counties Grouped Together to form PSUs
• Metropolitan Areas formed into Single PSUs• Rural Areas Grouped as appropriate
– Selection Criteria-Stratification• With Certainty—Self Representing—only one PSU within
the stratum• Selection proportional to population—multiple PSUs per
stratum—Non-Self Representing• Only one PSU selected per stratum
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Current Population Survey
• Field Structure
– Headquarters– 12 Regional Offices– 3 CATI Centers– Supervisory Field Representatives (Interviewers) – Field Representatives (FRs) /Interviewers
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Current Population Survey
• FR/Interviewer Initial Training
– 2 days of home study– 4 day classroom training– First day observation– Second day alone– Third day observation– Second Month Procedures– Sixth Month Procedures
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Current Population Survey
• Ongoing Quality Control and Training
– Monthly home studies– Monthly Feedback
• Household Nonresponse• Item Nonresponse
– Annual Observation– Special Needs Observation– Reinterview
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Current Population Survey
• Monthly Data Collection
– First Month—Personal Visit– Months 2-4—Telephone or Personal– Fifth Month—Attempt One Personal Visit First,
Telephone Calls permissible after that– Months 6-8—Telephone or Personal
– Overall—67 percent collected by telephone– MIS 2-4 and 6-8—85 percent telephone
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Current Population Survey
• Monthly Data Collection
– Demographics—only in MIS1 or replacement households, updates in other months
– Most labor force data collected each month, though some is dependently captured
• Industry and Occupation• Duration of Unemployment• Retired/Disabled Status
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Current Population Survey
• Industry and Occupation Data
– Initial Collection
– Dependent Collection—if possible
– Coding Procedures
• Coding Operations
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Current Population Survey
• Data Processing
– Edits
– Weighting
– File Creation
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Current Population Survey
• Edit Types
– Consistency Edits
– Longitudinal Edits
– “Hot Deck” Edits
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Current Population Survey
• Edit Modules
– Household– Demographics– Labor Force– Industry and Occupation– School Enrollment– Earnings
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Current Population Survey
• Weighting Steps
– Base Weights
– Noninterview Adjustment
– First Stage
– Second Stage
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Current Population Survey
• Second Stage Weighting
– Source of Controls
– Controls used
– Raking Procedures
• Compositing
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Current Population Survey
• Basic CPS Data Collection Cycle
– Interviewing begins Sunday of the Week containing the 19th (12th)
– Every evening the CATI Centers and all FRs transmit all completed cases
– Interviewing Ends Tuesday/Wednesday of the next week
– Production Processing Starts as soon as all data are transmitted to HQ
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Current Population Survey
– Data transferred to BLS on Thursday/Friday– BLS writes/reviews report on Monday/Tuesday– Wednesday/Thursday, BLS fine tunes the report– Friday: Release Day
• Date Released to the press and general public at 8:30• The Commissioner of BLS reports on the findings to the
Joint Economic Committee of Congress at 9:30
• Overall time from start of data capture to release: 20 days
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Current Population Survey
• ftp sites to access CPS data:
– http://www.bls.census.gov/ferretftp.htm
– http://www.nber.org/cps/
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Current Population Survey
• For more information:
– Greg Weyland (301) 763-3790