  Welcome to the fourth edition of the AI Index Report. This year we
significantly expanded the amount of data available in the report, worked with
a broader set of external organizations to calibrate our data, and deepened our
connections with the Stanford Institute for Human-Centered Artificial
Intelligence (HAI). The AI Index Report tracks, collates, distills, and
visualizes data related to artificial intelligence. Its mission is to provide
unbiased, rigorously vetted, and globally sourced data for policymakers,
researchers, executives, journalists, and the general public to develop
intuitions about the complex field of AI. The report aims to be the most
credible and authoritative source for data and insights about AI in the world.
