As a result of the current literature on the possible differences between purchasing services and purchasing materials, three hypotheses and three sub-hypotheses were established. The hypotheses were tested with a sample of 82 purchasing managers with and average of 9.8 years experience. Both qualitative and quantitative analysis was used to test the hypothesis. The results indicated that the managers believe that differences exist between purchasing services and purchasing materials; however, the perceived differences did not vary as a function of the managers' purchasing experience. The results also indicate that purchasing services was perceived as slightly more complex than purchasing materials. Finally, fifteen purchasing activities within the purchasing process were identified and differences between services and materials for these activities were analyzed. On fourteen of the activities, purchasing materials was perceived as more complex than purchasing services.
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