I'm compiling data on Germany for a video, and the Weimar inflation generated a negative number in the change operator. See Attached. CSV file to follow.
The change operator is working correctly. The data has a bodgy value for 1923 - 1E13. It's there in the CSV file. A number that huge couldn't be explained by the hyperinflation going on at that time, I don't think, assuming GDP was being denominated in marks.
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Actually maybe hyperinflation is the explanation. In Nov 2023, there were 4.21 E 12 marks to the US dollar.
In 1924, the Weimar republic introduced a new currency (the RentenMark - translates as Pensioner's mark), which would have rebased the GDP series at that point. So you'll just have to remove the 1924 figure from your series, as it is not meaningful to compare with 1923.
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CSV file
Also some peculiarities in the associated sheet.
The change operator is working correctly. The data has a bodgy value for 1923 - 1E13. It's there in the CSV file. A number that huge couldn't be explained by the hyperinflation going on at that time, I don't think, assuming GDP was being denominated in marks.
Actually maybe hyperinflation is the explanation. In Nov 2023, there were 4.21 E 12 marks to the US dollar.
In 1924, the Weimar republic introduced a new currency (the RentenMark - translates as Pensioner's mark), which would have rebased the GDP series at that point. So you'll just have to remove the 1924 figure from your series, as it is not meaningful to compare with 1923.