( Printable version )

Important
Important

This specification is draft. Feedback is welcome. Please write us at ces.qwi.feedback@census.gov.

1. Purpose

The public-use data from the Longitudinal Employer-Household Dynamics Program, including the Quarterly Workforce Indicators (QWI) and Job-to-Job Flows (J2J), are available for download with the following data schema. These data are available as Comma-Separated Value (CSV) files through the LEHD website’s Data page at http://lehd.ces.census.gov/data/ and through LED Extraction Tool at http://ledextract.ces.census.gov/.

This document describes the file naming schema for LEHD-provided CSV files.

2. Schema for Data File Contents

The contents (schema) for LEHD data files are described in lehd_public_use_schema..html. The contents (schema) for shapefiles are described in lehd_shapefiles.html.

3. Extends

This version reimplements some features from V4.0. Many files compliant with LEHD or QWI Schema v4.0 will also be compliant with this schema, but compatibility is not guaranteed.

4. Supersedes

This version supersedes V4.0.5, for files released as of RXXXX.

5. Basic Schema

All files are preceded by a file type definition, followed by additional information on the aggregation level of the file, or some other identifier.

[TYPE]_[DETAILS].[EXT]

( naming_convention.csv )

type Used By Description

[type]_[id]

qwix

CSV files queried from the LED Extraction Tool at http://ledextract.ces.census.gov/.

[type]_[geohi]_[demo]_[fas]_[geocat]_[indcat]_[ownercat]_[sa]

qwi qwir qwiv qwivr j2j j2jr j2jod

Common convention for currently provided files.

[type]\_[geocat]

shapefiles

ZIP files containing data for shapefiles

5.1. QWIPU from the LED Extraction Tool

Files downloaded through the LED Extraction Tool at http://ledextract.ces.census.gov/ follow the following naming convention:

[type]_[id].[EXT]

where [id] is the Request ID (a unique string of characters) generated every time Submit Request'' is clicked. The ID references each query submission made to the database.

5.2. Other files

Files downloaded from the LEHD website at http://lehd.ces.census.gov/data follow the following naming convention:

[type]_[geohi]_[demo]_[fas]_[geocat]_[indcat]_[ownercat]_[sa].[EXT]

where each component is described in more detail below. Schema files detailing legal values for each component can be downloaded from this website.

6. Description of Filename Components

6.1. Types

( naming_type.csv )

type Description Explanation url

j2j

Job-to-Job Flows Counts (J2J)

Counts of hires and separations, to and from employment and non-employment, summed across all establishments

tbd

j2jod

Job-to-Job Flows Origin-Destination

Origin and destination flows and earnings, tabulated by the destination establishment

tbd

j2jr

Job-to-Job Flows Rates

Hiring and separation rates, to and from employment and nonemployment, summed across all establishments

http://lehd.ces.census.gov/data/j2j_beta.html

lodes

LEHD Origin-Destination Employment Statistics (LODES)

LEHD Origin-Destination Employment Statistics (LODES) used by OnTheMap. Version 7 and higher of LODES was enumerated by 2010 census blocks. Version 6 and lower of LODES were enumerated with 2000 census blocks.

http://lehd.ces.census.gov/data/#lodes

qwi

Quarterly Workforce Indicators Public Use Counts (QWIPU)

The Quarterly Workforce Indicators (QWI) are a set of economic indicators including employment, job creation, earnings, and other measures of employment flows. The QWI are reported using detailed firm characteristics (geography, industry, age, size) and worker demographics information (sex, age, education, race, ethnicity).

http://lehd.ces.census.gov/data/#qwi

qwir

Quarterly Workforce Indicators Public Use Rates

Rates for flow variables in the Quarterly Workforce Indicators (QWI)

tbd

qwirv

Quarterly Workforce Indicators Variability Measures for Rates

Variability measures for rates in the Quarterly Workforce Indicators (QWI)

tbd

qwiv

Quarterly Workforce Indicators Variability Measures

Variability measures for Quarterly Workforce Indicators (QWI)

tbd

lehd_shp

LEHD Shapefiles

Shapefiles are used to provide mapping functionality in QWI Explorer and Job-to-Job Explorer

lehd_shapefiles.html

6.2. geohi

( naming_geohi.csv )

This component is based on the alphabetic FIPS state code equivalent to the numeric FIPS code in label_fipsnum.csv, based on FIPS PUB 5-2. It is expanded to encompass additional codes denoting national coverage, or a collection of states.

type Description

all

Collection of all available states

us

National data (50 states + DC)

st

Any legal 2-character state postal code (see naming_geohi.csv )

6.3. demo

( naming_demo.csv )

type Description

d

No demographic detail

rh

Race by Ethnicity tabulations

sa

Sex by Age tabulations

se

Sex by Education tabulations

6.4. fas

( naming_fas.csv )

type Description

f

No firm size or age detail

fa

Tabulations by firm age

fs

Tabulations by firm size

6.5. geocat

( naming_geocat.csv )

type Description

gb

Metropolitan/Micropolitan (complete)

gc

Counties

gm

Metropolitan/Micropolitan

gn

National (50 States + DC)

gs

States

gw

Workforce Investment Areas

6.6. indcat

( naming_indcat.csv )

type Description

n

all industries

ns

NAICS sectors

n3

NAICS subsectors

n4

NAICS industry groups

6.7. owncat

( naming_owncat.csv )

type Description

of

Federal government (QWI Code A01)

op

All Private (QWI Code A05)

oslp

State, local, and private ownership categories (QWI Code A00)

6.8. sa

( naming_sa.csv )

type Description

s

Seasonally adjusted

u

Not seasonally adjusted

6.9. ext

( naming_ext.csv )

type Description

csv

Comma-Separated file

pdf

PDF file (printable)

xls

Excel file (only select output)

xlsx

Excel file (not available for larger files)

7. Changes

For a description of how schema files are versioned, see main directory.

7.1. This version (revisions)

  • 2016-08-08: Initial release

7.2. Version 4.1-rc1 from 4.0.5

  • 2016-08-08: Implemented select changes from V4.1d-draft: Key changes are

  • Changed structure of state-level geography labels (flat directory structure) e5dbe97

  • Describes National QWI files and J2J files (both of which are still in beta), added J2J, National QWI spec

  • added additional geo_level for CBSA (complete), additional description, sources in label_geo_level.csv 1eb399f,27a2674

  • 2016-08-31: adjusted AL, AR, GA, IA, KY, LA, MN, MS, NM, PA, TN, TX metropolitan areas for 2016 geo vintage

7.2.1. In more detail

  • added geohi category of ALL, US, add naming_geohi.csv 89617e3

  • added naming convention for additional filesb

  • added agg_level variable 89617e3, 2149623

  • Changes to name of variable schema files (qwipu → qwi), addition of variability and rate variable schema files. 89617e3

  • Addition of a column identifying the type of variable on QWI 89617e3

  • Renamed file from QWIPU_Data_Schema.pdf to lehd_public_use_schema.pdf 89617e3

  • Addition of variable schema description for J2J 1a57250

  • Added a extension component [ext] to the file naming convention to reflect availability of Excel files (and PDF files) d9f8387 f7cc524

  • Updated documentation-generating scripts to the latest. Documents are now identified by date, not revision 8136f0c

  • Added a concatenation of geography files as label_geography.csv. 8136f0c, 39ecfc9

  • Added a column geo_level to all label_geography_* files a32bb4c

  • Changed fipsnum to force readin of FIPS as character, include geo_level, US. a32bb4c

  • Added additional legal values for firmage and firmsize, as used by J2J a32bb4c

  • Added Federal government to files (for National QWI) 942dd0a, 1654288

  • Clarified description of filenaming components 8888529, 8d580f6

  • Sundry small additional changes, building out the schema 28d7c6f

  • Changing of naming convention for to-be-released files based on federal government from fg → of. At this time, no such files have been released. 3a0975e

7.3. Version 4.1-rc2 from 4.1-rc1

  • 2016-08-10: Added description,definition of SHP files

  • 2016-08-11: Modified Indicator Names for J2J variable metadata.

7.4. Version 4.1-rc3 from 4.1-rc2

  • 2016-08-31: adjusted AL, AR, GA, IA, KY, LA, MN, MS, NM, PA, TN, TX metropolitan areas for 2016 geo vintage

For additional details, please consult the previous draft versions:

Important
Important

Some of the data products noted above do not exist yet.

This revision: Mon Sep 26 20:39:47 EDT 2016