What is the impact of a child's cognitive and emotional health from a variance of socioeconomic wellbeing?

What is the general transmission of socioeconomic inequalities in the development of a child's cognitive and emotional health? How is this tied?|||You mean how those spoiled brats on "Super Sweet 16" get angry when their parent get them the wrong luxury car for their birthday? I want to jump through the screen and stab them, many times. I grew up on welfare, and I was lucky to get anything for my birthday. How's that for emotional impact?