Let W be a complex analytic
manifold and V a divisor with normal crossings, and consider the Leray spectral
sequence associated to the inclusion map of W −V into W. We give two homological
reformulations for any of the drp,q to be the zero map for r ≧ 2. These conditions are
shown to be satisfied if W is compact Kähler, but it is easy to give examples when
it does not degenerate at E3 if W is only a differentiable manifold. The
nondegeneracy at E3 for arbitrary V in a compact Kähler manifold is interpreted in
terms of reiterated residues.