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LDB - Longitudinal Data Base
The LDB is a database of business establishments based on the micro data submitted quarterly by the States on the EQUI name and address files. Included on the database is information on:
* 1. Monthly employment
- 2. Quarterly wages
- 3. Business name and addresses
- 4. Industry and area codes
- 5. Other administrative data
Every unit on the database contains a unique identifier that allows tracking of individual establishments across quarters. The LDB is the sampling frame for many Bureau of Labor Statistics surveys, and serves as an important resource for labor market research. It is used to produce tabulations on business births and deaths, and job creation and destruction.
The LDB is a master database, maintained at BLS for establishment-level data over multiple years (i.e. for "longitudinal" (time series) tracking).
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