We thought that it might be useful if we ran through several themes that Guan Jie and I noticed, and that you might have noticed too. Note that this list is not comprehensive — it merely covers the themes that most leapt out to us as the case writers. If your conclusions differ, that's perfectly fine.
This is a companion discussion topic for the original entry at https://commoncog.com/c/cases/observations-on-scale-economies