@article{Mihaly:152283,
      author = {Mihaly, Kata and McCaffrey, Daniel F. and Lockwood, J. R.  and Sass, Tim R.},
      title = {{Centering and reference groups for estimates of fixed  effects: Modifications to felsdvreg}},
      journal = {Stata Journal},
      volume = {Volume 10},
      number = {Number 1},
      pages = {82. - 22},
      year = {2010},
      doi = {st0185},
}