Introduction:
In credit money, the money value is less than the commodity value. This means that the purchasing power of money decreases when credit is used as a form of payment. This concept is important to understand in economics as it has implications for inflation and the overall value of money.

Explanation:
- Credit money refers to money that is created through loans and credit transactions, rather than being backed by a physical commodity like gold or silver.
- When credit is used, it allows individuals and businesses to spend more money than they currently have, which increases the overall money supply in the economy.
- However, this increase in the money supply does not correspond to an increase in the production of goods and services, leading to a situation where there is more money chasing the same amount of goods.
- This imbalance between the money supply and the supply of goods and services results in inflation, which is the general increase in prices over time.
- As prices increase, the purchasing power of money decreases because the same amount of money can buy fewer goods and services.
- Therefore, the money value is less than the commodity value in credit money, as the increase in the money supply through credit does not result in a proportional increase in the supply of goods and services.

Example:
- Let's say there is an economy where the total money supply is $1,000 and the total supply of goods and services is 100 units.
- In this case, the average price of goods and services would be $10 ($1,000 / 100 units).
- Now, if credit is introduced and the money supply increases to $2,000 while the supply of goods and services remains the same, the average price of goods and services would increase to $20 ($2,000 / 100 units).
- This means that the purchasing power of money has decreased, as the same $10 that could previously buy one unit of goods and services can now only buy half a unit.
- Thus, the money value is less than the commodity value in credit money.

Conclusion:
In conclusion, in credit money, the money value is less than the commodity value due to the imbalance between the money supply and the supply of goods and services. This leads to inflation and a decrease in the purchasing power of money. Understanding this concept is important in analyzing the effects of credit on the economy and the value of money.