The main result of this paper is
(a slightly stronger form of) the following theorem: let T be a countable complete
first-order theory which is stable. If, for some α ≥ 1, the Malitz quantifier Qα2 is
eliminable in T then all Malitz quantifiers Qβm(β ≥ 0,m ≥ 1) are eliminable in T.
This complements results of Baldwin-Kueker [1] and Rothmaler-Tuschik
[3].