# BLS survey `bd`

Source: U.S. Bureau of Labor Statistics, LABSTAT time-series database (https://download.bls.gov/pub/time.series/bd/). Public domain U.S. government data. Credit: U.S. Bureau of Labor Statistics.

Survey documentation: `bd.txt`.

`*_series.parquet` defines each series_id (labels); `*_data_*.parquet` holds series_id, year, period (M01-M12 monthly, Q0x quarterly, A01/M13 annual), value, footnote_codes; other files map codes to labels.

| file | rows | columns |
|---|---|---|
| bd.contacts | 2 | Business Employment Dynamics Program Contacts |
| bd.county | 1 | county_code, county_name |
| bd.data.0.Current | 3584256 | series_id, year, period, value, footnote_codes |
| bd.data.1.AllItems | 4598544 | series_id, year, period, value, footnote_codes |
| bd.dataclass | 8 | dataclass_code, dataclass_name, display_level, selectable, sort_sequence |
| bd.dataelement | 2 | dataelement_code, dataelement_name |
| bd.footnote | 2 | footnote_code, footnote_text |
| bd.industry | 91 | industry_code, industry_name, display_level, selectable, sort_sequence |
| bd.msa | 1 | msa_code, msa_name |
| bd.ownership | 1 | ownership_code, ownership_name |
| bd.periodicity | 2 | periodicity_code, periodicity_name |
| bd.ratelevel | 2 | ratelevel_code, ratelevel_name |
| bd.seasonal | 2 | seasonal_code, seasonal_text |
| bd.series | 34464 | series_id, seasonal, msa_code, state_code, county_code, industry_code, unitanalysis_code, dataelement_code, sizeclass_code, dataclass_code, ratelevel_code, periodicity_code, ownership_code, series_title, footnote_codes, begin_year, begin_period, end_year, end_period |
| bd.sizeclass | 32 | sizeclass_code, sizeclass_name |
| bd.state | 54 | state_code, state_name |
| bd.unitanalysis | 1 | unitanalysis_code, unitanalysis_name |