Given a collection of nested closed, convex symmetric sets and a linea
r functional, we find estimates which are within a logarithm term of b
eing simultaneously asymptotically minimax. Moreover, these estimates
can be constructed so that the loss of this logarithm term only occurs
on a small subset of functions. These estimates are quasi-optimal sin
ce there do not exist estimators which do not lose a logarithm term on
some part of the parameter spaces.