Signaling in medical residencies in the upcoming 2023 season

 One approach that is being adopted in applications for medical residencies is to allow signals of interest.

Here's an announcement from ERAS, the Electronic Residency Application Service® :

Supplemental ERAS® application for the ERAS 2023 cycle

"With the support of their specialty leadership organizations, programs from the following specialties may participate in the supplemental ERAS application for the 2023 ERAS season. "

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Here's a 2010 paper that includes some of the experience of signaling in the Economics Ph.D. market. We used (and still use) only 2 signals, and we definitely rejected the idea of gold and silver signals...

The Job Market for New Economists: A Market Design Perspective, by Peter Coles, John Cawley, Phillip B. Levine, Muriel Niederle, Alvin E. Roth, and John J. Siegfried (Journal of Economic Perspectives—Volume 24, Number 4—Fall 2010—Pages 187–206)