
The long-run purchasing-power series that grounds gold inflation-hedge claims.
Roy Jastram assembled price data for England from 1560 and for the United States from 1800, and compared the purchasing power of gold with commodity price indices over those periods. The book is the foundational empirical study of gold as a store of value.
His finding, which gave the book its title, is that gold's purchasing power at the end of each long period was close to what it had been at the beginning. Between those points it varied substantially. What produced the long-run stability was a pattern he called the retrieval phenomenon: gold's purchasing power rose during deflations, when the nominal gold price was fixed and other prices fell, and fell during inflations, when the fixed gold price could not keep pace. Gold therefore protected purchasing power over centuries and failed to protect it during the inflationary episodes when holders most wanted protection.
Jastram's data covers periods when the gold price was officially fixed, which is the analysis's central limitation for a modern reader: the mechanism he identifies depends on that fixity. The book was published in 1977, shortly after gold began floating, and a later edition updated by Jill Leyland extends the series through the floating period, where the behaviour differs. The empirical work is careful and the finding that gold is a poor short-horizon inflation hedge and a good multi-century store of value has held up.
Investors considering gold as an inflation hedge or store of value who want the long-run empirical record rather than assertion.
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