Technical discussion of growth equations and data sources

Technical discussion of growth equations and data sources The passage contains only abstract economic formulas and references to publicly available data sets (Piketty‑Zucman, Global Financial Data). It does not mention any individuals, institutions, transactions, or controversial actions that could serve as investigative leads. Key insights: Defines free and thrift acceleration as components of economic growth.; Describes how to calculate free growth and thrift using capital and acceleration terms.; Notes that zero‑growth points recur frequently in stock index data.