Estimating the political orientation of twitter users in homophilic networks

There have been many efforts to estimate the political orientation of citizens and political actors. With the burst of online social media use in the last two decades, this topic has undergone major changes. Many researchers and political campaigns have attempted to measure and estimate the political orientation of online social media users. In this paper, we use a combination of metric learning algorithms and label propagation methods to estimate the political orientation of Twitter users. We argue that the metric learning algorithm dramatically increases the accuracy of our model by accentuating the effect of homophilic networks. Homophilic networks are user clusters formed due to cognitive motivational processes linked with cognitive biases. We apply our method to a sample of Twitter users in Germany’s six-party political sphere. Our method obtains a significant accuracy of 62% using only 40 observations of training data for each political party.