Experimental   economics   is   the   use   of   experimental   methods   to   evaluate
theoretical predictions of economic behaviour. It uses controlled, scientifically designed
experiments  to  test  economic  theories  under  laboratory  conditions.  Typical  empirical
research is limited by the fact that only a subset of the set of all possible influences affect
(or can be observed to be affecting) economic decision making. This inhibits or severely
limits the ability to control for certain influences. With experiments, economists can fix
some inputs and measure the effects of other inputs in a way that allows ceteris paribus
comparisons.