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   Despite the tremendous role of online consumer reviews (OCRs) in facilitating consumer purchase decision making, the potential inconsistency between product ratings and review content could cause the uncertainty and confusions of prospect consumers toward a product. This research is aimed to investigate such inconsistency so as to better assist potential consumers with making purchase decisions. First, this study extracted a reviewer’s sentiments from review text via sentiment analysis. Then, it examined the correlation and inconsistency between product ratings and review sentiments via Pearson correlation coefficients (PCC) and box plots. Next, we compared such inconsistency patterns between fake and authentic reviews. Based on an analysis of 24,539 Yelp reviews, we find that although the ratings and sentiments are highly correlated, the inconsistency between the two is more salient in fake reviews than in authentic reviews. The comparison also reveals different inconsistency patterns between the two types of reviews. 

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3. Performance of droop-controlled microgrids with heterogeneous inverter ratings

   Oral, H. Giray ; Gayme, Dennice F. ( June 2019 , European Control Conference (ECC19))

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   https://doi.org/10.1111/ecin.12920  

   Grant, Laura E. ( March 2021 , Economic Inquiry)

   The largest charity‐ratings organization evaluates thousands of charities with combined annual donations of $100 billion. Because charities' initial rating occurs at different times, in random order, I can estimate how the introduction of the ratings affects giving. Donationsdecreaseby 5%–9%, on average. The pattern is intuitive: Donations to highest‐rated (4‐star) charities are stable. Yet for each consecutive star lower, donations decrease, with1‐starcharities losing 12%–14%. I also impute each charity's ratings for years before being rated determine the effect of prior information. Annual losses for the rated charities are approximately $2 billion. Several reasons for the losses are discussed including salience of information, donor expectations, and charity visibility.

    

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