That is very interesting. Since Heckscher wrote this in 2021, was he perhaps one of the "one or two very good economists in Sweden" mentioned by F.A. Hayek below?

If yes, I'd be most interested in more detail to the following episode. It is actually quite a crucial matter for the monetisation of Bitcoin.

“During World War I the great paper money inflation in all the belligerent countries brought down not only the value of paper money but also the value of gold, because paper money was in the large measure substituted for gold, and the demand for gold fell. In consequence, the value of gold fell and prices in gold rose all over the world.

That affected even the neutral countries. Particularly Sweden was greatly worried: because it had stuck to the gold standard, it was flooded by gold from all the rest of the world that moved to Sweden which had retained its gold standard; and Swedish prices rose quite as much as prices in the rest of the world.

Now, Sweden also happened to have one or two very good economists at the time, and they repeated the advice which the Austrian economists had given concerning the silver in the 1870s, “Stop the free coinage of gold and the value of your existing gold coins will rise above the value of the gold which it contains.

The Swedish government did so in 1916 and what happened was again exactly what the economists had predicted: the value of the gold coins began to float above the value of its gold content and Sweden, for the rest of the war, escaped the effects of the gold inflation.”

"A Free-Market Monetary System" (1977) Friedrich A. Hayek