Online Reputation Model Using Moving Window

Abstract

Abstract-Users are increasingly dependent on decision tools to facilitate their transactions on the internet. Reputation models offer a solution to the users in supporting their purchase decisions. The reputation model takes product ratings as input and produces product quality as score. Most existing reputation models use naïve average method or weighted average method to aggregate ratings. Naïve average method is unstable when there exist a clear trend in the ratings sequence. Also, the weighted methods are influenced by unfair and malicious ratings. This paper introduces a new simple reputation model that aggregates ratings based on the concept of moving window. This approach enables us to study variability of ratings over time which allows us to investigate the trend of ratings and account for sudden changes in ratings trend. The window size can be defined by either number of ratings or duration. The proposed model has been validated against stat-ofart reputation models using Mean Absolute Error and Kendall tau correlation.

OPRC: An Online Personalized Reputation Calculation Model in Service-Oriented Computing Environments

“…In recent years, some researchers have also focused on online measurements for reputation. Azzeh et al [20] proposed an online reputation model that aggregates ratings based on a moving window that can capture the variability in the ratings over time. Gao and Zhou [21] proposed an iterative group-based ranking method to evaluate user reputation that is based on the weighted sizes of the user rating groups in online rating systems.…”

Reputational intelligence: innovating brand management through social media data

“…Even when academic studies exist that define some measurements of reputation in online contexts (Azzeh, 2017;Casimiro and Coelho, 2017;Dutot and Castellano, 2015), they do not study how the perceptions of stakeholders extracted from the internet could influence the business of organisations. These perceptions, which are very difficult to measure, are part of the so-called intangible assets of companies, while their business is framed within their tangible assets.…”