Analyzing review efficacy on Amazon.com: Does the rich grow richer?

Highlights：

• Review efficacy is conceptualized as review readership and review helpfulness.

• Review efficacy on Amazon.com is examined as a function of reviewer reputation.

• Properties of titles and descriptions of reviews are related to review efficacy.

• Antecedents of review readership are not identical to those of review helpfulness.

• Antecedents of review efficacy are different for reputed and novice reviewers.