Abstract
The influence of six organizationalfactors on the adoption of three types of innovations was examined in public libraries. It wasfound that (a) all factors together were a better predictor of technological than administrative or ancillary innovations, and (b) specialization and organizational slack had a stronger effect on technological innovations than the other two types, whereas administrative intensity and organizational size had a stronger effect on administrative innovations. It is concluded that differentiation between types of innovations and stages of adoption is essential in developing realistic theories of organizational innovations.