Add measure of competitive access by Allen and Farber (2020)

[rafapereirabr]

• Allen, J., & Farber, S. (2020). A measure of competitive access to destinations for comparing across multiple study regions. Geographical analysis, 52(1), 69-86.
  • Ungated preprint.

[dhersz]

How should we name it?

[rafapereirabr]

Hey @jamaps! We would like to implement your dynamic competitive access metric in the {accessibility} package. However, it would be great to have some contribution here since you and Steve are the ones who came up with the idea. So if you have any suggestions on how we could implement the code in R (or python) it would be great.

also, if you have any suggestions to how we should name the function would be very helpful as well :)

[jamaps]

Sounds great!

If you already have a floating catchment type metric, you could expand upon that, iterating until A_i is very close to A_i from the previous iteration. I think that's how I did it originally. For the first iteration, you'll likely have to assume that L_j (access to the labour force/population) is equal everywhere.

Maybe just call it competitive?

I don't have much bandwidth to contribute at the moment - but I'm happy to give it test - it's been at least 2-3 years since I've done fancy accessibility stuff :)