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Published online by Cambridge University Press: 20 January 2017
Both the rate and the amount of culture change through time may be determined by comparing traits of one temporal segment of a continuum with other segments in progression from the oldest to the youngest segment. Additive and subtractive changes, or innovations and losses, must be evaluated against the time scale rather than balanced against one another, because of the time lag which may occur even if an innovation does produce a corresponding loss.