此文件为SAS软件下关于债务期限结构影响因素研究的相关代码。包含两个文件，一个为问题说明，一个为代码。主要侧重金融数据处理领域。-This file is SAS code about the research of effects of debt maturity structure related factors . Contains two files, one describes question,the other is code.main focus is financial dat