So I'm a tall skinny guy and have always heard that long arms makes bench more difficult, certainly the longer your arms the farther you have to push the weight etc...

My question is: has anyone done any sort of scientific or mathematical evaluation of this concept?

For instance "we theorize based on our research that for every inch in arm length completing a bench press of x lbs is increased in difficulty by %Y."

...or maybe there's a rule of thumb that gym guys use like say "every 2 inches in arm length = minus 10 lbs on bench"

It's probably the case that people are so different that the above wouldnt' be applicable, and I wonder if bench press would correlate more with body weight than length but if it were possible I would like to see some statistics on both.