There is no study that's been done. We have a doctoral student who's doing a PhD on this issue because we couldn't find any literature. There's a lot of literature on two issues. There's literature on whether money buys happiness: if you win the lottery, does it buy happiness in the general population, and does it buy happiness if you have mental illness and poverty?
There's very little to no information in military samples. As you're aware, disability and benefits and those kinds of issues have a big impact.