Sorry economists, you don't do science, no matter how much envy you have.  Nor you, mathematicians, and social psychologists surveying undergraduates are disqualified too. 

In order to be a science you have to be scientifically rigorous - that doesn't mean just using some statistics. Obviously, even getting funding from the National Science Foundation doesn't qualify as science, though it should.

Writing on RealClearScience, Drs. Alex Berezow and Ross Pomeroy lay out the 5 criteria you need to separate the science from the non-science.