Measures a buying firm's intentions to expand future purchases and increase the share of business allocated to a focal supplier. Higher scores indicate stronger future purchase expansion intentions. Used as the key relational performance outcome in the study.
Likert
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CR = .93, AVE = .78. 5-point strongly agree–strongly disagree scale. One item is reverse-scored. Validated on combined US and German manufacturing sample (n=478). Study found all three types of customer costs (direct product, acquisition, and operations) significantly predict expansion intentions.
Cannon, J.P. & Homburg, C. (2001). Buyer–supplier relationships and customer firm costs. Journal of Marketing, 65(1), 29–43.
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