1 Some studies (Cabral and Hortascu 2002, Eaton 2002, Jin and Kato 2002, Livingston 2002, Resnick and Zeckhauser 2002, and Bajari and Hortascu 2003) have shown that the more positive (or less negative) a feedback profile the greater the probability of sale.
2 In the context of our regression model, the impact of experience is estimated assuming the proportion of positive responses constant, so an increase in the number of negative feedback responses would come with a ( generally substantial) increase in the number of positive responses. For example, if the proportion of positive responses were 95%, an increase in the number of negative responses by one would be accompanied by an increase of 19 in the number of positive feedback responses.