Advanced chemicals / Fine chemicals / Basic and process materials Sub-industry and Supply-chain Study

Filter-difference study

Against the 401-record Advanced materials / Fine chemicals / Basic and process materials Supply-chain Study, this 267-record cohort shares 260 records. Only 7 occur here and 141 only in the reference; the union contains 408. These are filter-membership differences, not company entries or exits.

An ID-deduplicated archive snapshot, not the whole market, current recognition or operating results.

The largest recorded reporting jurisdiction participation gap is for Jiangsu: 24/267 here versus 52/401 in the reference, an absolute difference of 4.0 percentage points. The cohorts have overlapping company IDs and are not independent samples.

Zero means no recorded label, not no business; multi-label cells overlap.

Multi-label counts can overlap; filter compliance is not industrial advantage.

Existing excerpts do not certify entire old reports; list linkage is not final recognition. Full definitions are on the series page.

Shared records with Advanced materials / Fine chemicals / Basic and process materials Supply-chain Study: 260; records in this cohort but outside that set: 7. The intersection/union ratio is 63.7%, a measure of label overlap rather than business collaboration. Read comparison

Shared records with Fine chemicals / Basic and process materials Supply-chain Study: 267; records in this cohort but outside that set: 0. The intersection/union ratio is 36.1%, a measure of label overlap rather than business collaboration. Read comparison