A critical specification lacking from much theory and research on organizat
ions is that of time scale. Specification of the relevant time scale is as
critical as the specification of the appropriate level or unit of analysis,
a concept to which it is related. We define and explore five types of time
scales and consider their implications for both the social constructionist
and positivist approaches. Using examples from strategy and organizational
theory, we show how the choice of time scale has important implications fo
r the development of theory.