PSL_TPI_filt
IPO Tripole Index, 13-yr filtered (PSL)
TPI low-pass filtered (13-yr Chebyshev); the filter ends leave recent years provisional. — Henley et al. 2015 · base 1971–2000
DATA THROUGH 2026-10-12 · UPDATED 2026-10-13 11:02 UTC
TPI low-pass filtered (13-yr Chebyshev); the filter ends leave recent years provisional. — Henley et al. 2015 · base 1971–2000