最近在做毕业论文，其中一个模型是检验资产证券化对美国银行市场的影响，样本是过去十年美国银行的季度数据，因变量是是否资产证券化，证券化1 不证券化0，如果使用xtlogit啊？我的结果如下：

. xtlogit  rconprob rconlnta rconloanratio deltarconcap rcon7205totalriskbasedcapitalrat
Fitting comparison model:
Iteration 0:   log likelihood = -14774.255
Iteration 1:   log likelihood =  -12491.77
Iteration 2:   log likelihood = -12056.747
Iteration 3:   log likelihood = -12017.744
Iteration 4:   log likelihood = -12016.607
Iteration 5:   log likelihood = -12014.766
Iteration 6:   log likelihood = -12012.758
Iteration 7:   log likelihood = -12012.183
Iteration 8:   log likelihood = -12012.117
Iteration 9:   log likelihood = -12012.097
Iteration 10:  log likelihood = -12012.092
Iteration 11:  log likelihood = -12012.091
Iteration 12:  log likelihood = -12012.091
Fitting full model:
tau =  0.0     log likelihood = -12012.091
tau =  0.1     log likelihood = -10512.407
tau =  0.2     log likelihood = -9392.3869
tau =  0.3     log likelihood = -8517.2918
tau =  0.4     log likelihood = -7852.9822
tau =  0.5     log likelihood = -7394.2665
tau =  0.6     log likelihood =  -7126.719
tau =  0.7     log likelihood = -7010.9586
tau =  0.8     log likelihood = -7096.3569
Iteration 0:   log likelihood = -7005.4819

stata运算到这里就不动了........这些都是什么含义啊？
再问一个小问题
设完面板数据之后，运行xtdes命令，结果如下：
. xtdes
   _TS_p_delta_getnumb():  3499  strtoreal() not found
_TS_p_delta_increment():     -  function returned error
           _TS_p_delta():     -  function returned error
                 <istmt>:     -  function returned error
r(3499);
是啥意思啊？
先谢谢大家了.......