before_sent:  Stage-Gate Controls, Learning Failure, and Adverse Effect on Novel New Products . Journal of Marketing, 72(1): 118. Christensen, C., Kaufman, S., & Shih, W. 2008.
before_sent_with_intent: <others>  Stage-Gate Controls, Learning Failure, and Adverse Effect on Novel New Products . Journal of Marketing, 72(1): 118. Christensen, C., Kaufman, S., & Shih, W. 2008.
after_sent:  Stage-gate controls, learning failure, and adverse effect on novel new products . Journal of Marketing, 72(1): 118. Christensen, C., Kaufman, S., & Shih, W. 2008.