Bi-proportional Matrix Balancing - RAS for Stata

[Niágara Rodrigues]

I am looking for Stata functions that implement a procedure called "Bi-proportional Matrix Balancing" which is also referred to as "RAS". The technique adjusts the elements of an arbitrary matrix so that the row and column sums of the matrix equate to user-supplied initial "control total" or "margin" row and column vectors. The RAS technique is commonly applied to economic input-output matrices as a way of updating an inter-industry transactions matrix from one year to the next. I have found several examples of RAS programs using GAMS but I'm hoping someone has implemented RAS for Stata to spare me the job of writing my own code.

[Nick Cox]

There are old programs of mine on SSC.

mstdize (2006)

mstdizem (part of matodd) (1998)

Both predate Mata, but should still work.