Social systems are based on________?

Suppose that the demand curve for tin is highly inelastic. If the supply curve of tin decrease and increase cyclically along the demand curve for tin then in this market the size of the price fluctuation will be ________ the size of the quantity fluctuations?

For a given level of technology, we should expect an increase in productivity within a nation when there is an increase in each of the following except?

Scientific research relates to________?

Stratification systems tend to________?

Treasury bill is used for________?