The Rasmussen poll on elites[0] has a nice working definition of "those having a postgraduate degree, a household income of more than $150,000 annually, and living in a zip code with more than 10,000 people per square mile" as well as a fascinating material difference in the beliefs of that 1% of the population as compared to the rest.

If I may editorialize, perhaps we can also posit that if someone does not meet these criteria but nevertheless shares the same opinions as the elite, then they are desiring to join the elite.

[0]: https://committeetounleashprosperity.com/wp-content/uploads/...