Linked Data
| Database Name | Survey Unit | Frequency | Time Periods Available | Number of Observations | Description | Sponsor | Sector |
| Longitude Business Database (LBD) | Establishment | Annual | 1976-2005 | 24 million unique establishments | All US business establishments with paid employees from 1976 to present | Business | |
| Longitudinal Employer Household Dynamics (LEHD) | Enterprise(firm) | Quarterly | 1989-2005 | several millions | Full list of establishments Business Register associated with the business units in the crosswalk and measures of activity (e.g. employment, sales) | Bureau of the Census | Business |
| Longitude Firm Trade Transaction Database (LFTTD) | Transaction | Annual | 1992-2005 | several million | links individual trade transactions to firms in the United States | Bureau of the Census | Multiple |
