One is the impact of living in rented houseing to criminality indicators and incarceration rates. I suspect that it is 5 to 1 for people in jail to have lived in rented housing at the time of their arrest, or worse.
One factor is the ability of landlords to present "evidence" against tenants they dont like, which should be impossible since they have keys and can plant evidence any time they wish. There should be no possiblity of probable cause coming from landlord reports.
Another factor is that landlords often cause tenants to live in a constantly stressed environment, that landlords routinley break obvious laws and that the police do not respond to tenan complaints of theft, extortion or fraud, as well as invasion of privacy, assault and domestic violence. Police tend to regard renters as subordinant people of lower status than home owners and to be more agressive towards them as well. People living in this environment often feel they "have to take matters into their own hands to survive".
Another study is on women who died of ovarian cancer in the mid 90's. I just had the weird experience of looking at a picture of Barak Obama's mom and saying "she probably died of ovarian cancer" then reading the words "she died of ovarian cancer".
The other woman I know who looked like her and died of the same causes at the same time was also cremated, so it will be difficult but I belive there is a genetic/eugenic link.