https://phys.org/news/2018-05-massive-ai-twitter-probe-entrepreneurial.html

Professor Obschonka said the study proved a Twitter-based personality estimate is as successful in predicting local differences in actual entrepreneurial activity (e.g., local start-up rates) as regional personality data collected by means of millions of standard personality tests.

"What we have discovered here is that social media – how language is used in Twitter—is a reliable marker of economic vitality in a region," Professor Obschonka said.