Mapping the Underlying Social Structure of Reddit

Reddit is a popular website for opinion sharing and news aggregation. The site consists of thousands of user-made forums, called subreddits, which cover a broad range of subjects, including politics, sports, technology, personal hobbies, and self-improvement. Given that most Reddit users contribute to multiple subreddits, one might think of Reddit as being organized into many overlapping communities. Moreover, one might understand the connections among these communities as making up a kind of social structure.

Building a Recommendation System with Beer Data

Beer culture in the United States has changed dramatically in the past decade or so. One reflection of this is that the number of small-scale breweries has increased in every state in the country. This trend is also reflected in the development of a vibrant community of people who rate, review, and share information about beers online. Websites like BeerAdvocate, RateBeer, and Untappd provide forums for beer drinkers to discuss their favorite beers with each other.