  We present studies of the SU(2) gauge theory with 4, 6 and 10 fermion
flavors. These models are expected to lie on both sides of the edge of the
conformal window, where the theory has an infrared fixed point. We observe that
the coupling grows with the length scale at four flavors, implying QCD-like
behavior. At ten flavors the results are compatible with a Bank-Zaks type fixed
point. The results at six flavors remain inconclusive: the running is slow
towards the infrared but the range and accuracy of the study are insufficient
for determining the existence of a fixed point.
