In general, things with a higher value per mass have less price variation across countries, because transport costs are less important, but less competition and price transparency, because they’re more specialized and lower-volume.
Gold is high value per mass, but has a lot of price transparency and competition.
In general, things with a higher value per mass have less price variation across countries, because transport costs are less important, but less competition and price transparency, because they’re more specialized and lower-volume.
Gold is high value per mass, but has a lot of price transparency and competition.