I am working in a text that I use the following:
"I measure the similarities between companies."
There are many companies, but I evaluate the similarity "between" 2 companies. I mean if I have 3 companies, namely A, B, C, I have to evaluate the similarities in pairs and I provide the similarity between A and B, B and C, and A and C, i.e, three measures of similarities.
My doubt is the text above should be
"I measure the similarities among companies."
Or is it correct?