Leslie matrix was used to predict population by sex and age during 1991~2000 according to the population census data in 1990.Predicted population in 2000 was compared with the cencus data in 2000 to determine the predictive effect.

• [方法]利用北京市1990年人口普查资料,用莱斯利矩阵的方法,预测1991年~2000年年龄别、性别人口数,并将2000年的预测人口数与2000年普查的实际人口相比较,以判定预测效果。