I mistyped my response. All four of these statements are not always true.
They are not all equivalent; HOWEVER, if the converse is true, then the inverse is true.
And, if the original statement is true (p->q) then the contrapositive is true.
And, there can be a situation where all statements are true.
Example:
Statement If two angles are congruent, then they have the same measure.
Converse If two angles have the same measure, then they are congruent.
Inverse If two angles are not congruent, then they do not have the same measure.
Contrapositive If two angles do not have the same measure, then they are not congruent.
To figure out the 'truth', you would have to ask if it makessense. For instance, using your example, the economy can very well grow with a different factor. (it doesn't have to just be consumer spending -- but this gets into assumption questions etc)