Across 35 years, the cost of computing, communications, energy and transportation collapsed by 99.97%. Money supply rose 576%. Consumer prices rose 150%. The Deflation Index puts all three on one chart so the divergence is visible at a glance.
The index (v4.0) is a weighted geometric mean of four technology-cost series, each a single sourced metric starting when measurement starts: computing (compute/storage/memory blend, since 1990), communications (wholesale IP transit, since 1998, −99.99%), energy (IRENA solar LCOE, since 2010, −89%), and transportation (BloombergNEF battery packs, since 2010, −91%). Methodology, sources, the audit that produced this revision, and all data are open on GitHub.