How much do charter schools help a city?

[Ross Sumner]

I am currently looking at a duplex in a D area. One unit is occupied and the other unit needs work. Once the second unit gets worked on, the duplex has a cap rate in the high teens. Another plus is that the city has a plan in place, and have broken ground on 17 charter schools, to improve the city. I am in the process of putting together a packet for investors and I want to put a piece in there about the city's plans to revitalize and improve. I have been looking for some figures to show how charter schools may help a city but I have had trouble finding measurable data. I see a lot of opinion pieces saying "charter schools help" basically but I can't imagine that is good enough to move the investor's needle. Does anyone know where I could go to find some useful information?