Increasing numbers of fast food takeaways are springing up close to schools in England, with pupils in the most socially deprived areas exposed to five times as many outlets as their richest peers.
So, where do you put schools? In areas of decent enough population density.
Where do you put shops? In areas of decent enough population density.
You would also prefer to have both in those areas of high population density where the land is a bit cheaper. The “deprived” areas.
Thus this finding is like discovering that the water companies put the sewage pipes in where people live.