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Companies have been automating or offshoring an increasing proportion of their production and manufacturing (transformational) activities and their clerical or simple rule-based (transactional) activities. As a result, a growing proportion of the labor force in developed economies engages primarily in work that involves negotiations and conversations, knowledge, judgment, and ad hoc collaboration - or tacit interactions. By 2015, employment in jobs primarily involving such interactions will account for about 44% of total US employment, up from 40% today.

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