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Article Critique–Proactive Postsales Service When and Why Does It Pay off Essay Preview: Article Critique–Proactive Postsales Service When and Why Does It Pay off Report this essay Article ReviewedChallagalla, G., Venkatesh, R. and Kohli, A. “Proactive Postsales Service: When and Why Does It Pay Off?”, Journal of Marketing, 2009, Vol.73, No. 2, pp.70-87.Critique of research.