Forskningsrön genom politiskt prisma. Intervju med 3 nationalekonomer

Hösten 2017 intervjuade jag tre nationalekonomer om spänningen mellan politik och forskning. Det var kul. Publicerad i Dagens ETC 25 december 2017.

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Notes on Acemoglu & Robinson: “The End of General Laws of Capitalism”

Acemoglu & Robinson (AR) published a text 2015 that was kind of like a comment on Piketty, but more a general comment on a lot of big things, Marx and other stuff. Strongly recommended reading. Here’s some notes, which is mostly quotes from AR.

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Ny rapport om a-kassa & arbetslöshet

Ragnar Bengtsson & jag har skrivit en rapport för Sveriges a-kassor/Nätverket Unga utredare om sambandet mellan a-kassa och arbetslöshet. Det är en relativt lättläst introduktion till lite forskning och vi gör även lite beräkningar, utifrån metoden i den liknande rapporten av Harbo-Hansen m.fl. från 2013.

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Notes on Piketty, capital and labor, theory and data

Notes on Piketty, capital and labor, theory and data

Piketty’s (2014) book Capital and associated articles contains a lot of fascinating stuff and has inspired a lot of interesting debate. Here are some summary notes. Please comment on errors. If you want to change the world, you need to know how it works.

The critique: Data and theory don’t support the r > g story, Piketty’s 2nd law, that low growth and high returns on capital will make K/Y increase in the future.

  • Net savings rate does not seem to be stable in the long run and does not seem to correlate negatively with growth.
  • Adjusted for valuation, K/Y doesn’t seem to have increased in the last decades, contrary to some of Piketty’s main findings.
  • Piketty means that the elasticity of substitution between K and L (\sigma) is above 1, based on, among other things, data on K/Y. But if K/Y hasn’t increased, Piketty might also be wrong about \sigma. A lot of earlier empirical analysis indicates \sigma< 1. Also, for Piketty’s theory to hold, \sigma might need to be much higher than Piketty suggests.

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