Share your insights or perspective on the financial matter presented in the input.

How is gold shared in worldwide economies?
You might want to read about about the Coase Theorem.  "In law and economics, the Coase theorem, attributed to Ronald Coase, describes the economic efficiency of an economic allocation or outcome in the presence of externalities. The theorem states that if trade in an externality is possible and there are no transaction costs, bargaining will lead to an efficient outcome regardless of the initial allocation of property rights. In practice, obstacles to bargaining or poorly defined property rights can prevent Coasian bargaining." This is similar to what you are asking. Each country has an endowment of gold, and they must create a set amount of money to represent their endowment of gold. This will establish an exchange rate. If I have 5 tons of gold and you have 5 tons, and I print 10 dollars and you print 20, then one of my dollars is worth two of your dollars.  Thus, the amount of money is not relevant-  it's the exchange rate between the countries. If all the nations know each other's gold endowment, then we will have a perfect exchange rate. If we don't, then currency printing will vary but arbitrage should drive it to an accurate price.  Gold and diamonds are both valuable in part due to scarcity, but gold has been used as a measure of value because it's been historically used as a medium of exchange. People just realized that swapping paper was safer and cheaper than physically transporting gold, but the idea of gold as a measure of value is present because "that's how it's always been." Nobody "creates/supervises" these procedures, but organizations like the IMF, ECB, Fed Reserve, etc implement monetary policy to regulate the money supply and arbitrage drives exchange rates to fair values.