| 步骤 | 引进的变量 | 模型中存在的变量 |
| 1 | 参加理财社团x13 | x13 |
| 2 | 父母支持x10 | x13, x10 |
| 3 | 年级x3 | x13, x10, x3 |
| 4 | 自主学习x14 | x13, x10, x3, x14 |
| 5 | 生活费x6 | x13, x10, x3, x14, x6 |
| 6 | 同学炒股x11 | x13, x10, x3, x14, x6, x11 |
| 7 | 专业x4 | x13, x10, x3, x14, x6, x11, x4 |
| 8 | 专业课程x12 | x13, x10, x3, x14, x6, x11, x4, x12 |
| 9 | 性别x1 | x13, x10, x3, x14, x6, x11, x4, x12, x1 |
| 10 | 学校x2 | x13, x10, x3, x14, x6, x11, x4, x12, x1, x2 |