请大神帮忙看看啊~~~怎么会有时间的虚变量被dropped呢??!!
快疯了.......
e | Coef. | Std. Err. t | P>t | [95% Conf. | Interval] |
Inc_operat~g | 0.330373 | .0610091 5.42 | 0 | 0.210782 | 0.449964 |
Inc_property | 0.393818 | .039088 10.08 | 0 | 0.317197 | 0.470439 |
hzage | -190.273 | 32.10223 -5.93 | 0 | -253.2 | -127.345 |
poage | -148.954 | 28.04178 -5.31 | 0 | -203.922 | -93.9859 |
hzsex | -1099.14 | 337.7712 -3.25 | 0.001 | -1761.24 | -437.034 |
hzedu4 | 2893.684 | 421.4521 6.87 | 0 | 2067.549 | 3719.82 |
poedu4 | 2377.762 | 567.4464 4.19 | 0 | 1265.447 | 3490.077 |
year2004 | 205.6055 | 447.8801 0.46 | 0.646 | -672.334 | 1083.545 |
year2005 | 1083.361 | 430.1116 2.52 | 0.012 | 240.2509 | 1926.47 |
year2006 | 1580.238 | 427.8751 3.69 | 0 | 741.5121 | 2418.964 |
year2007 | 1910.418 | 434.5045 4.40 | 0 | 1058.697 | 2762.138 |
year2008 | 2290.258 | 434.1773 5.27 | 0 | 1439.179 | 3141.338 |
year2009 | (dropped) | ||||
_cons | 29560.98 | 1324.757 22.31 | 0 | 26964.17 | 32157.78 |
用的2003到2009年的,把03年做的基准,怎么2009年会出现dropped呢......
求解答啊~~~求解答~~~~求解答~~~~