  Recent ARPES measurements on the electron-doped cuprate Nd_{2-x}Ce_xCuO_4 can
be interpreted in a mean field model of uniform doping of an antiferromagnet,
with the Mott gap closing near optimal doping. Mode coupling calculations
confirm the mean field results, while clarifying the relation between the Mott
gap and short-range magnetic order. The same calculations find that hole doped
cuprates should follow a strikingly different doping dependence, involving
instability toward spiral phases or stripes. Nevertheless, the magnetic order
(now associated with stripes) again collapses near optimal doping.
