Yeah, that was always my understanding of what PBG meant - it's P * 10^(Pop). But you could do (P+0.5) or whatever.

10^(Pop+P/10) could work I guess maybe but that seems hard.

On Wed, Jan 17, 2018 at 4:47 PM, Kenneth Barns <xxxxxx@gmail.com> wrote:

Oh, I agree that the PBG officially represents a 2nd significant figure. But it does mean that the Pop represents a log scale, and the PBG represents an arithmetic scale. Messy. :(