On Sequential Bias in Web-Based Reviews
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TL;DR
It is widely recognized that online product reviews by users in sites such as amazon.com are biased in several dimensions including those due to the sequence in which the reviews are written as well as the benefit that the reviewer gains from writing a review.
Abstract
It is widely recognized that online product reviews by users in sites such as amazon.com are biased in several dimensions including those due to the sequence in which the reviews are written as well as the benefit (monetary or otherwise) that the reviewer gains from writing a review. Although the latter is obvious and is often practiced by stakeholders wanting to promote their products (e.g., [2], [3], [4], [7]), the former is not entirely innocuous since subsequent reviews are not completely independent of preceding reviews by others.