28% of boys ages 3-17 have mental, emotional, behavioral or developmental problems versus 23% of girls.
Is this new, though? Or has it always been the case? Especially among adolescents, testosterone can do quite a number on their thinking, especially with as yet under-developed frontal cortexes.
Labor force participation...
Ah, so men still participate at a higher rate than women, 89% to 78%. How is this falling behind?
Additionally, 19% of men ages 25-34 now live with parents, compared to 13% of women.
Sure, but how many of the 87% of women who don't live with parents are still economically dependent on someone else they're living with? I bet a higher proportion than men.
Male suicide rates for ages 15-24 have nearly doubled...
This is indeed a disturbing statistic. I think it has to do with unrealistic expectations and conflicting messages given by society to young men (just as women are given unrealistic expectations about body image, for example.)
The contemporary American economy is not rewarding a lot of the characteristics associated with men and masculinity
"Characteristics associated with men and masculinity" are stereotypes. Men and women can both be gentle, kind, nurturing, and other "feminine" things, and men and women can both be rough, assertive, cruel and aggressive and other "masculine" things. Men should forget about these stereotypes and not try to live up to them, but just be themselves.