Chopsticks
I wish there was a source. It would have made for a considerable time saving
It's the result of 15+ years of reading anything that isn't behind a pay wall. Trawling through references to find out more about the stuff that is behind a pay wall. And then begging sister and BIL to help me in my quest to discover any obvious flaws in the methodology and statistics. Ferreting out the back story of authors to shine a light on any potential for cherry picking and bias. Chanting my mantra of "correlation is not causation" lest I forget it...in my excitement of finding something that appeals to my own bias.
That's not to say it would take 15 years to read a significant amount of sources in order to get a good idea of the general picture. Google and search strings like "outcomes for children of X families" throws up results that can then be waded through in days and weeks rather than a decade and a half. I just happen to be a slow reader when it comes to academic writing. 
It's thrown up some interesting ideas as to what the "crux" of the matter may be, in terms of how children can be set at an advantage or disadvantage. Especially when you look at the groups that tend to be found to have better outcomes. Because the classic, traditional mantra of "two parents good, one parent bad, this is the factor that counts !" is not upheld.
It appears to be more a case of ... the factors that may be the ones that primarily count are:
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avoiding causing trauma in children's lives
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inconsistent societal/parental attitudes towards children's pain where trauma cannot be avoided.
Which is better news than "children of single/blended parents are DOOMED!" Because eventually we may be able to create a more level playing field for children of all kinds of families by utilising findings on a practical level, once we have distilled them to identify specific stratagies/attitudes that make the majority of the difference.
I'm not saying we'll necessarily get to a point where there won't be any notable difference at all in outcomes for children from various types of families. But we might be able to make a considerable push forward in terms of mitigating the impact of significant familial events on children's futures. Potentially that is an awful lot of lives and outcomes improved.
However (IMO) there are sticking points that could significantly slow down that from happening. If the answer is recalibration of the equation of parental wants/needs/happiness v children's wants/needs/happiness and a very significant change in the validation/support of children's pain then there will be groups with a fixed ideology that will leap all over the data, cherry pick the bits they like and turn the rest into a stick to beat people they disapprove of with.
Which which slow down any progress considerably. Because the thrust in the 70s to de-stigmatise came from a good place.* Naturally people will be resistant to moving towards what they might suspect is as a return to that kind of blanket social stigma.
* I remember my 7 year old friend sobbing over the double whammy of losing her dad AND becoming a pariah in the 70s. I've never quite healed the additional wound of emerging from the rubble of my exploded family in the early 80s to discover that the conservatives had labelled the family I did not chose for myself as the "root of all evil in society". That was hardly a solution to children's pain by any stretch of the imagination.
This is an area where there are many well resourced groups with very fixed, but wildly conflicting ideology. And they all seem happy enough to chuck real live children under the bus rather than let go of the their articles of faith. Becuase from their persepctive there is no bus chucking going on. The blinkers won't let them see the big fat wheels squishing small people. And the effect of that could well be that findings struggle to gain traction in real families, in real lives.
Now I have depressed myself.