This post by Gavyn Davies has been cross-published at Gavyn’s own blog.
The work of Carmen Reinhart and Ken Rogoff (RR) on public sector debt ratios, and their relationship with GDP growth, has been extraordinarily influential in academic and policy circles since 2010. Before this week, their statistical analysis, based on a 200-year database which they had painstakingly assembled covering dozens of countries, had appeared to establish an important stylised fact: that debt ratios above 90 per cent were associated with much lower rates of GDP growth than debt ratios under 90 per cent. The sudden drop in growth at a debt ratio similar to that reached in many developed economies acted as a wake up call to governments and encouraged the adoption of austerity programmes. Read more

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2Japan's mini crash: Blame China, not just Ben
3Spain's awful unemployment
4The Nikkei: a market abducted by retail
5S&P 2,100, by Goldman Sachs
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