This paper presents an extensive analysis of the behavior of union and nonu
nion wages over the business cycle, using quasi-panels developed from the C
urrent Population Survey, in an attempt to resolve or reconcile competing c
laims about the cyclical behavior of union and nonunion wages. Union wages
were roughly as procyclical as nonunion wages were, prior to the early 1980
s. Substantial reductions in union wage pro cyclicality since then are asso
ciated with reductions in the procyclical ex ercise of bargaining power.