New revision, November 2013.
Vox column: “The Riksbank is wrong about the debt: Higher policy rates increase rather than decrease the household-debt ratio,” September 3, 2013.
Abstract
“Leaning against the wind” — a tighter monetary policy than necessary for stabilizing inflation
around the inflation target and unemployment around a long-run sustainable rate — has been
justified as a way of reducing household indebtedness. But, under realistic assumptions, it
actually has the opposite effect; it leads to higher real household debt and a higher household
debt-to-GDP ratio. The reason is that a tighter policy than a baseline induces a relatively slow
fall below the baseline of total nominal (mortgage) debt but a faster fall in the nominal price
level and nominal GDP. There is then first a rise in real debt and the debt-to-GDP ratio relative
to the baseline, a rise that is almost as large and as fast as the fall in the price level and nominal
GDP. Then, real debt and the debt-to-GDP ratio slowly fall back to the baseline during a few
additional years. Therefore, “leaning against the wind” as a way of reducing the household
debt-to-GDP ratio is counterproductive.