We show that at the critical point of chiral random matrix models, novel sc
aling laws for the inverse moments of the eigenvalues are expected, We eval
uate explicitly the pertinent microscopic spectral density, and find it in
agreement with numerical calculations. We suggest that similar sum rules ar
e of relevance to QCD at the critical temperature, and even above if the tr
ansition is amenable to a Ginzburg-Landau description. (C) 1999 Elsevier Sc
ience B.V. All rights reserved.