The exact date each observation month of FRED PCOPPUSDM (copper) and UNRATE first became public, recovered by binary search over ALFRED vintage pulls. Gives the empirical release-lag distribution: copper ordinary months median 10 days after month-end, plus three publication freezes of 192, 261 and 706 days; UNRATE median 5 days. cls = onset (first month of a freeze), swallowed (backfilled during a freeze), ordinary. Reconstructed 2026-09-26.
| Column | Range | Mean | Filled |
|---|---|---|---|
| series | 2 distinct | — | 100% |
| obs | 129 distinct | — | 100% |
| month_end | 129 distinct | — | 100% |
| pub | 117 distinct | — | 100% |
| days_after_month_end | 1–687 | 70.45 | 100% |
| cls | 3 distinct | — | 80% |
| as_of | 1 distinct | — | 100% |