If we need #Ph.D.'s #studies to show the #large #differences between #populations something is really wrong everywhere. Considering that those who can afford and have #secured #incomes can attend #schools while the others can not, an index of #affordability and #limitedopportunities shall be enough to infer about #populations #affordability #lackofsupport

#formingonline groups will #achieve a limited #success when there are #large differences in #knowledge