I would also be curious to know if there are statistics available regarding children who have departed this earth too early. (i.e. run over by car accidentally, parent accidentally rolled over while sleeping... I mean unintentional or intentional fatal injuries ) What could statistics show are the most common reasons an 11 year old would die.
This was the most interesting article I could find:
Cinderella effect - Wikipedia, the free encyclopedia
Also this (regarding New York, but still contains some general statistics)
http://www.nyc.gov/html/doh/downloads/pdf/episrv/episrv-childfatality-book09.pdf
"Alternative hypotheses
It has been noted by multiple researchers that child abuse is an intricate issue and is affected by other factors.[15][37][38] Daly and Wilson state, however, that even if evolutionary psychology cannot account for every instance of stepparental abuse, this does not invalidate their empirical findings.[34]
Burgess and Drais propose that child maltreatment is too complex to be explained fully by genetic relatedness alone and cite other reasons for child maltreatment, such as social factors, ecological factors and child traits such as disability and age.[15] However, they also note that these traits are simply indicative, and do not inevitably lead to child maltreatment.[15] Temrin and colleagues also suggest that there may be other factors involved with child homicide, such as prior convictions, drug abuse problems, lost custody battles and mental health problems.[37]
In 1984, Giles-Sims and David Finkelhor categorized and evaluated five possible hypotheses that could explain the Cinderella effect: “social-evolutionary theory,” “normative theory,” “stress theory,” “selection factors” and “resource theory”. The social-evolutionary theory is based on the proposal that non-genetically related parents will invest less in costly parental duties, due to the fact that their genes are not being passed on by that individual. The normative theory proposes that, due to genetic repercussions, incest among genetically related individuals is a widespread taboo and would thus be less common among biological relatives. They propose that incest among stepfamilies would be less taboo, since there is no risk of genetic degradation. The stress theory proposes that increased stressors, which are inherently more common among stepfamilies, cause an increased risk of abuse. The selection factors theory proposes that individuals who are likely to be stepparents (divorcees) are likely to be inherently more violent due to emotional disturbances, aggressive impulses, and self-esteem issues. Due to this, stepparents as a group would have a higher proportion of individuals with violent-prone characteristics, which would suggest that the abuse is happening due to personality factors, rather than the stepparental relationship directly. Finally, according to resource theory, individuals who contribute resources are granted authority, while individuals that lack resources are denied authority and more likely to resort to violence to obtain authority. It is therefore hypothesized that stepparents who are able to contribute resources to a family and have those resources be accepted by the family are less likely to be abusive. However, this hypothesis had yet to be tested directly on stepfamilies.[38] This paper of Giles-Sims and Finkelhor predates however practically all empirical studies on the Cinderella effect."