# Log

• 2026-10-30 P0 contract written. P1 audit: data clean, no exclusions.
• 2026-10-30 Decision: bandwidth = ceil(Andrews 1991 AR(1) plug-in, Bartlett) computed on slope score (x-xbar)u -> 9 lags; NW1994 rule (5) and grid reported as sensitivity. Normal reference, no small-sample correction.
• 2026-10-30 P2 baseline (iid SE) reproduces memo. P3 HAC done. P4 checks all pass. P5 report written.