The price of every thing rises and falls from time to time and place to place; and with every such change the purchasing power of money changes so far as that thing goes. Alfred Marshall Finance
But if inventions have increased man's power over nature very much, then the real value of money is better measured for some purposes in labour than in commodities. Alfred Marshall Money
The price of every thing rises and falls from time to time and place to place; and with every such change the purchasing power of money changes so far as that thing goes. Alfred Marshall Money