Which innovative market research technique revolutionized the publishing industry in the 2010s by allowing publishers to predict bestsellers with significantly higher accuracy?

The publishing industry relies heavily on market research to determine which books will succeed in an increasingly competitive market. From focus groups to sales analytics, publishers have developed sophisticated methods to predict reader preferences. How well do you understand the market research strategies that shape the books that reach our shelves? Test your knowledge of how data drives decisions in the literary world!

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Sentiment analysis of social media discussions about similar titles
Random sampling of readers in bookstores
Analysis of library borrowing records
Monitoring of author website traffic