[jasonwatkinspdx]

Well, it's arguable either way IMHO. I'd give priority to Bagwell because he first published his work academically in 2000. At the time he worked for Odersky, the author of the Scala language. So these structures were in Scala's implementation first, then adapted and improved for Clojure.

[modersky]

Phil Bagwell was loosely associated with my group in 2000 but did not work for me then. His work at the time was theoretical; the first practical implementation is Clojure's. Scala's implementations only appeared in version 2.8, in 2010.

[jasonwatkinspdx]

Awesome, thanks for the correction.

[brudgers]

Since Rich Hickey isn't in academia, but instead a working programmer, using publication dates doesn't feel like it is the best criterion for determining who did what when.