Consider the exposure vs. critical age hypotheses that Chetty and Hendren discuss as potential mechanisms that could explain the pattern of results they see. Describe the point/intuition of these hypotheses. Discuss whether their empirical test, aimed at providing evidence for one or the other of these hypotheses, is convincing. Irrespective of whether exposure vs. critical age holds true, propose through an example a concrete idea that demonstrates a reason whereby late movers (adolescents) may struggle and fail to benefit from moving into a better neighborhood.