
According to the NYT, if you want to know how Facebook categorizes you, just go to facebook.com/ads/preferences on your browser. (You may have to log in to Facebook first.)
Under the “Interests” header, click the “Lifestyle and Culture” tab.
Then look for a box titled “US Politics.” In parentheses, it will describe how Facebook has categorized you, such as liberal, moderate or conservative.
The NYT says Facebook makes a deduction about your political views based on the pages that you like — or on your political preference, if you stated one, on your profile page.
Even if you don’t like any candidates’ pages, if most of the people who like the same pages that you do — such as Ben and Jerry’s ice cream — identify as liberal, then Facebook might classify you as one, too.
But the system isn’t foolproof. I checked and it said I’m a liberal. Anybody who knows me knows that couldn’t be further from the truth. So much for data analysis.