Uncertain demand, the structure of hospital costs, and the cost of empty hospital beds

A Heteroskedasticity-Consistent Covariance Matrix Estimator and a Direct Test for Heteroskedasticity

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Empirical Finance, Econometric Model, Volatility Modeling +13

Specification Tests in Econometrics

Jerry A. Hausman · Econometrica · 1978 · 18K citations

Applied Economics, Time Series Econometrics, Instrumental Variable Test +17

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Econometric Model, Volatility Modeling, Economics +15

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De-Min Wu · Econometrica · 1973 · 1.3K citations

Dynamic Economic Model, Economics, Stochastic Regressors +14

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Roger Koenker · Journal of Econometrics · 1981 · 580 citations

Volatility Modeling, Statistics