Here is a quote from this Washington Post article (I did not read the whole article):
Parents lack confidence in their instincts and in their judgment. Previous generations had no trouble making hard and fast rules. Parents in those days looked like and conducted themselves as adults and role models; kids and teenagers wanted to grow up and get the perks of adult life as soon as possible. Therapists see the inverse today. There are lots of parents who are uncomfortable with their grownup role and want to be young again; their kids don’t want to grow up, or wish to postpone it as long as possible.
I originally saw the link here and the post here.