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r-g before and after the Great Wars 1507-2023

Kenneth Rogoff and Paul Schmelzing

No 33202, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: We present new long-run samples of r-g series over centuries for key economies in the international financial system. Across a wide variety of econometric approaches, and including duration-matched constructions, we demonstrate strong evidence of trend stationarity in these series. Although we confirm trend stationarity, we find robust evidence of a major structural break in the first third of the 20th century. A multi-century downward trend in r-g appears to have levelled off in the years around 1930, and since then r-g has shown high volatility coupled with clear upwards pressure: notably, though real interest rates may still appear favorably low, aggregate growth rates are drifting downwards in advanced economies since the interwar period, creating secular pressures on r-g and debt sustainability. Our results stand in contrast to much recent literature and suggest the need for much more caution in assuming benign trends in global public debt sustainability. At the same time, when adding riskier elements of capital returns, the data lend support for structurally increasing "dynamic efficiency". We then associate the key 1930s inflection to the establishment and growth of welfare states in advanced economies, and the surge in non-defense, non-interest expenditures.

JEL-codes: N20 (search for similar items in EconPapers)
Date: 2024-11
New Economics Papers: this item is included in nep-fdg, nep-gro and nep-his
Note: IFM ME
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