Subsequent enterprise adoption studies incorporated these three forces and provided significant empirical support for their relevance. (Wilkins, Castleman, & Swatman, 2001), for example, highlighted the impact of customers and suppliers on the ICT adoption decision, while (Ginsberg & Venkatraman, 1992) showed that vendor support and marketing efforts played an important role as well. In general, external influences were shown to be important forces that had to be considered in the enterprise adoption literature.