  In this paper we analyze six examples of birational transformations between
toric orbifolds: three crepant resolutions, two crepant partial resolutions,
and a flop. We study the effect of these transformations on genus-zero
Gromov-Witten invariants, proving the Coates-Corti-Iritani-Tseng/Ruan form of
the Crepant Resolution Conjecture in each case. Our results suggest that this
form of the Crepant Resolution Conjecture may also hold for more general
crepant birational transformations. They also suggest that Ruan's original
Crepant Resolution Conjecture should be modified, by including appropriate
"quantum corrections", and that there is no straightforward generalization of
either Ruan's original Conjecture or the Cohomological Crepant Resolution
Conjecture to the case of crepant partial resolutions. Our methods are based on
mirror symmetry for toric orbifolds.
