Baalenlil7

Stefen has often said that putting a child (years 0-4) in daycare has statistically similar outcomes on the child (socio-economically and psychologically) as does abandoning the child outright. Stefen is good about citing his sources when he makes claims, but I'm having trouble tracking down a specific video where I can get to the actual cited sources. Can anyone help me find credible sources, research studies, statistics, etc on peaceful parenting?