Final answer:
Between 1890 and 1914, the gold stock of the world doubled, but world prices fell during this time.
Step-by-step explanation:
Between 1890 and 1914, the gold stock of the world doubled, but world prices fell during this time. This statement is true.
During this period, countries were on the gold standard, meaning their currencies were backed by gold. As the demand for gold increased, the price of gold also increased. However, this did not translate into higher prices for goods and services because the money supply did not increase proportionally to the increase in gold stock.
Instead, there were other factors, such as improved production and transportation techniques, which led to an increase in the supply of goods and services. This increase in supply outpaced the increase in money supply, causing world prices to fall.