Efficient Estimation of Time-Invariant and Rarely Changing Variables in Finite Sample Panel Analyses with Unit Fixed Effects

Plumberadn Troeger(2006) Efficient Estimation of Time-Invariant and Rarely Changing Variables in Finite Sample Panel Analyses with Unit Fixed Effects.
(1)時間をつうじて変化しない、もしくは緩慢にしか変化しない説明変数を採用する場合の、固定効果モデルの解説
(2)