We study wage bargaining in which the union is uncertain about the fir
m's willingness to pay and threat payoffs vary over time. Strike payof
fs change as replacement workers are hired, as strikers find temporary
jobs, and as inventories or strike funds run out. We find that bargai
ning outcomes are substantially altered if threat payoffs vary. If dis
pute costs increase in the long run, then dispute durations are longer
, settlement rates are lower, and wages decline more slowly during the
short run (and ma even increase). The settlement wage is largely dete
rmined from the long-run threat, rather than the short-run threat.