Discussion of "Impact of Frequentist and Bayesian Methods on Survey   Sampling Practice: A Selective Appraisal" by J. N. K. Rao
  This comment emphasizes the importance of model checking and model fitting when making inferences about finite population quantities. It also suggests the value of using unit level models when making inferences for small subpopulations, that is, "small area" analyses [arXiv:1108.2356]. 
J. Sedransk
stat.ME