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According to statista.com, US Q4 GDP growth rate was 2.6% over the economy in Q3. However, why is the annualized growth rate for the US therefore not be a sum of all 4 quarters if their definition of QoQ growth is basically how much the economy grew over the previous quarter? i.e. why is according to statista, the GDP growth of the US in 2018-19 only 2.9%, and not 2.6 + 3.4 + 4.2 + 2.2?

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Because those data are Seasonally adjusted annual rate: https://en.wikipedia.org/wiki/Seasonally_adjusted_annual_rate From 'more information tab'

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  • $\begingroup$ So the chart shows growth rate for that quarter, seasonally adjusted, multiplied by 4? $\endgroup$ – Evil Washing Machine Mar 13 at 17:43
  • $\begingroup$ Yes, it's like such grow would have continued for the whole year. And 2.9 is the real year grow and it's close to the averege of the quarterly gains: (2.6 + 3.4 + 4.2 + 2.2)/4 = 3.1 $\endgroup$ – Michel_T. Mar 13 at 17:50

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