A recession

A decline in the birth rate

The government raises the minimum school leaving age

The government raises the minimum retirement age

make all labour force participants better off.   

 none of the above (or below).

 make all labour force participants worse off. 

force business to pay a real wage that is greater than the marginal product of labour. 

result in an excess supply for labour.

None of the other answers are correct.

This economy is experiencing an increase in the level of unplanned inventories and this change in inventories will cause producers to decrease their production.

This economy is currently experiencing an economic boom.

This economy is experiencing a decrease in the level of unplanned inventories and this change in inventories will cause producers to increase their production.