This volume contains all the published mathematical papers by the late Professor Pao-Lu Hsu. A volume of selected papers, including 19 items, six of which were in Chinese, was published by the Science Press in China in 1981. At the request of Beijing University, I took charge of the present, more complete compilation. My task was made easy by a previous list of Hsu's publications in the memorial article in the Annals 01 Statistics, Vol. 7, No. 3 (1979). The list has now been revised to contain 40 items instead of 37. Seven of the papers, Nos. 30, 31, 32, 33, 35, 38, and 40 on the new list,...