Across 35 years, the cost of computing, communications, energy and transportation collapsed by 96.5%. 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 is a weighted average of four technology-cost series, each rebased to 1990 = 100: computing ($/GFLOPS, −99.9%), communications ($/GB, −99.4%), energy (solar $/kWh, −98.5%), and transportation (lithium-ion battery $/kWh, −86.5% since 2010). Methodology, sources, and all data are open on GitHub.