The impact of final-state radiation (FSR) on the radiative return method for
the extraction of the e+e- hadronic cross section is discussed in detail.
Possible experimental tests of the model dependence of FSR are proposed for the
pi+pi- hadronic final state. The importance of the (pi+pi-photon) final state
contribution to the muon anomalous magnetic moment is investigated, and a
method based on the radiative return is proposed to extract these contributions
from data.Comment: Presented by H. Czyz at XXVII International Conference of Theoretical
Physics, `Matter To The Deepest', Ustron, 15-21 September 2003, Poland. To
appear in Acta Physica Polonica B: http://th-www.if.uj.edu.pl/act
