  We show that the dynamical equations describing the collective behavior of
the model introduced by Cavagna et al. i) are not their Eqs. (5,6) but rather
ii) are the same as those of the minority game (MG). As a consequence the
analytic solution of the MG presented in [PRL, 84, 1824 (2000)] holds also for
this model. Finally we show that iii) the the large temperature behavior of the
model is different, due to small simulation times, from that discussed by
Cavagna et al.
