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Pao-Lu Hsu
Pao-Lu Hsu (许宝騄) (September 1, 1910 – December 18, 1970) was a Chinese mathematician noted for his work in probability theory and statistics.
==Hsu's work in statistics==
In 1938, Hsu's first two statistical papers, which appeared in Vol. II of the Neyman–Pearson edited Statistical Research Memoirs, were concerned with Behrens–Fisher problem〔Hsu, P. L. (1938). "Contribution to the theory of 'Student's' t-test as applied to the problem of two samples." ''Statistical Research Memoirs.''〕 and the optimal estimate of ''σ''2 in the Gauss–Markov model.〔Hsu, P. (1938). "On the best unbiased quadratic estimate of the variance." ''Statistical Research Memoirs'', 2, 91–104.〕 The most important paper in this series is〔Hsu, P. (1941). Analysis of variance from the power function standpoint. Biometrika, 32(1), 62–69.〕 where Hsu obtains the first optimum property for the likelihood ratio test of the univariate linear hypothesis, in fact essentially the first nonlocal optimum property for any hypothesis specifying the value of more than one parameter. From 1938 to 1945, Hsu published several papers in the forefront of the development of the theory of multivariate analysis. He obtained several exact or asymptotic distributions of important statistics in the theory of multivariate analysis.〔(Academic Achievements of Professor P.L. Hsu )〕〔Lehmann, E. L. (1979). Hsu's work on inference. The Annals of Statistics, 471–473.〕
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