LEHD Public Use CSV Naming Schema V4.2a-draft

Important

This document is not an official Census Bureau publication. It is compiled from publicly accessible information by Lars Vilhuber (Labor Dynamics Institute, Cornell University). Feedback is welcome. Please write us at lars.vilhuber@cornell.edu.

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 V4.1.0, for files released as of R2016Q4

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.
lehd_shp_[geocat].zip	shapefiles	ZIP files containing data for shapefiles
version_[demo]_[fas].txt	metadata	Machine-readable text files with metadata on geographic and temporal coverage for QWI
version\_[type].txt	metadata	Machine-readable text files with metadata on geographic and temporal coverage for J2J
j2jod_[geography]_avail.csv	metadata	Complex metadata (used only in J2JOD) - see below

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. Metadata for QWI data files (version.txt)

Metadata accompanies the data files, identifying provenance, geographic and temporal coverage. These files follow the following naming convention:

version_[demo]_[fas].txt

where each name component is described in more detail below.

5.3. Metadata for J2J data files (version.txt)

Metadata accompanies the data files, identifying provenance, geographic and temporal coverage. These files follow the following naming convention:

version_[type].txt

where each name component is described in more detail below.

5.4. Metadata for J2JOD files

Because the origin-destination (J2JOD) data link two regions, we provide an auxiliary file with the time range for which cells containing data for each geographic pairing may appear in a data release. The reference region will always be either the origin or the destination. These files follow the following naming convention:

j2jod_[geography]_avail.csv

where each name component is described in more detail below.

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
sarhe	Collection of sa-rh-se 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 (complete)
gc	Counties
gm	Metropolitan/Micropolitan (state parts)
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)

2017-04-04: Initial release

7.2. Version 4.2a-draft from 4.1.1

See github

Important

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

This revision: Tue Apr 4 15:13:45 EDT 2017

LEHD Public Use CSV Naming Schema V4.2a-draft - CSV Naming Convention

1. Purpose

2. Schema for Data File Contents

3. Extends

4. Supersedes

5. Basic Schema

5.1. QWIPU from the LED Extraction Tool

5.2. Metadata for QWI data files (version.txt)

5.3. Metadata for J2J data files (version.txt)

5.4. Metadata for J2JOD files

6. Description of Filename Components

6.1. Types

6.2. geohi

6.3. demo

6.4. fas

6.5. geocat

6.6. indcat

6.7. owncat

6.8. sa

6.9. ext

7. Changes

7.1. This version (revisions)

7.2. Version 4.2a-draft from 4.1.1