Abstract: The biased estimates proposed to overcome the ill-conditioned of the design matrix has made considerable headway inthe theory and method,which is used extensively in practice. The principal comconent estimate is one of the importantmethods which has been studied by many pepole. The infinite-sample properties of the principal component estimate aregiver in this paper.

Key words: principal component estimate, infinite-sample property.

摘要： 针对设计阵病态而引人的有偏估计无论从理论上和方法上都取得了较大的发展并已广泛应用于实际。而主成分估计是其中较重要的一类，有关研究已相当丰富，本文进一步讨论了它的大样本性质。

关键词: 主成分估计, 大样本性质