Illustration: Allie Carl/AxiosToday's AI users employ the technology more as a collaborator than as an autonomous helper, according to a new study of real-world AI use by Anthropic, shared exclusively with Axios.Why it matters: The new Anthropic Economic Index is an ambitious effort to track the impact of AI adoption by directly analyzing anonymized data on how people are using Claude, Anthropic's chatbot.The big picture: Today, only AI providers have a direct view of what people are actually do...