How to Measure Acceleration on Twitter

There's this big heterogeneity in how people use the platform, and they have different levels of engagement with the platform. The question for me was, what am I going to measure on Twitter that's going to tell me something about how things change? And I basically gave up because I couldn't think of anything. But then a young scientist, Philip Lohan, who came to visit and talk about his work on something that I had done, or related to something I had done on network side. He showed his finger about how hashtags kind of increased in popularity, and then decreased in popularity again. When I saw that, I realized that this was it. This was the thing that could be