This study shows that strikes in construction have, by most measures, increased during the years since 1949, a period during which strike activity tended to decline in American industry as a whole. The authors demonstrate that this increase has resulted not from an increase in the number of wage disputes but from a growing number of jurisdictional strikes and the increasing severity of economic and union-organizing strikes. They also show that the number of strikes in construction does not vary significantly with the unemployment rate in that industry nor with the presence of wage controls, but both of those factors have a significant impact on the composition of strike activity in construction.