3.
A market

5.
The extent of the change of demand for a commodity to a given change in . . . . . . . ., other demand determinants remaining constant, is termed as the . . . . . . . . of demand.

6.
The difference in return between a chosen investment and a necessary one passed up in the law of variable proportion indicates:

8.
Put these concepts in chronological order of their development.
1. Law of demand
2. Law of indifference
3. Law of DMU
4. Revealed preference theory
5. Indifference curve

9.
In a market economy, the allocation of resources between different productive activities is determined mainly by: