最近在写银行效率的论文，样本选取的是39家中国不同ownership的商业银行10年的数据，用stochastic frontier analysis求的cost efficiency，代码就是根据frontier编写的但是最后list te的时候发现数字都差不多而且都很高，本身对stata真的太会啊55555 请问一下这个是因为我数据的问题吗？？？会不会是样本量太少缺失太多的原因？？？求大家帮帮忙啊先谢谢各位啦～～～.
predict te,te
(191 missing values generated)

. list te

+----------+
| te |
|----------|
1. | . |
2. | . |
3. | . |
4. | . |
5. | . |
|----------|
6. | . |
7. | . |
8. | .9978542 |
9. | . |
10. | .9978691 |
|----------|
11. | .9978447 |
12. | . |
13. | . |
14. | . |
15. | .9978024 |
|----------|
16. | . |
17. | . |
18. | . |
19. | . |
20. |.997903 |
|----------|
21. | .9979045 |
22. | . |
23. | .9978136 |
24. | . |
25. | .9978194 |
|----------|
26. |.997842 |
27. | . |
28. | . |
29. | . |
30. | .9978967 |
|----------|
31. | . |
32. | . |
33. | . |
34. | .9978102 |
35. | . |
|----------|
36. | . |
37. | . |
38. | . |
39. | . |
40. | .9978211 |
|----------|
41. | . |
42. | . |
43. | .9977797 |
44. | . |
45. | . |
|----------|
46. | . |
47. | . |
48. | . |
49. | . |
50. | . |
|----------|
51. | . |
52. | .9977998 |
53. | . |
54. | .9978228 |
55. | . |
|----------|
56. | .9978515 |
57. | . |
58. | . |
59. | .9977592 |
60. | . |
|----------|
61. | . |
62. | .9977948 |
63. | .9977872 |
64. | .9978318 |
65. | . |
|----------|
66. | .9978441 |
67. | .9978153 |
68. | .9978352 |
69. | . |
70. | .9977916 |
|----------|
71. | . |
72. | . |
73. | . |
74. | . |
75. | . |
|----------|
76. | .9977763 |
77. | . |
78. | .9978092 |
79. | . |
80. | . |
|----------|
81. | . |
82. | .9977952 |
83. | . |
84. | .9977537 |
85. | . |
|----------|
86. | . |
87. | . |
88. | . |
89. | . |
90. |.997778 |
|----------|
91. | . |
92. | .9977462 |
93. | . |
94. | . |
95. | .9977602 |
|----------|
96. | .9978032 |
97. | .9978514 |
98. | . |
99. | .9977447 |
100. | .99774 |
|----------|
101. | .9977461 |
102. | . |
103. | .9977582 |
104. | .9977593 |
105. | . |
|----------|
106. | .9977844 |
107. | . |
108. | .9977335 |
109. | . |
110. | .9977489 |
|----------|
111. | . |
112. | . |
113. | . |
114. | . |
115. | . |
|----------|
116. | .9977814 |
117. | . |
118. | .9977982 |
119. | . |
120. | . |
|----------|
121. | . |
122. |.997807 |
123. | . |
124. | . |
125. | .9978003 |
|----------|
126. |.997819 |
127. | .9978508 |
128. | .9977613 |
129. | . |
130. | .9978321 |
|----------|
131. | .9977996 |
132. |.997835 |
133. | . |
134. | . |
135. | .9978501 |
|----------|
136. | . |
137. | . |
138. | .9977949 |
139. | .9978281 |
140. | .9978092 |
|----------|
141. | . |
142. | .9978578 |
143. | .9978254 |
144. | . |
145. | . |
|----------|
146. |.997829 |
147. | . |
148. | . |
149. | .9978449 |
150. | . |
|----------|
151. | . |
152. | .9977942 |
153. | . |
154. | .9978386 |
155. | . |
|----------|
156. | .9978083 |
157. | . |
158. | .9978018 |
159. | .9978454 |
160. | .9978791 |
|----------|
161. | .9978623 |
162. | .9977732 |
163. | . |
164. | .9978145 |
165. | . |
|----------|
166. | . |
167. | .9978095 |
168. | .9978144 |
169. | . |
170. | .9978384 |
|----------|
171. | .9978149 |
172. |.997838 |
173. | . |
174. | . |
175. | . |
|----------|
176. | .9978085 |
177. | . |
178. | . |
179. | . |
180. | . |
|----------|
181. | .9978738 |
182. | . |
183. | .9978604 |
184. | . |
185. | . |
|----------|
186. | .9978173 |
187. |.997856 |
188. | . |
189. |.997754 |
190. | .9978018 |
|----------|
191. | . |
192. | . |
193. | . |
194. | . |
195. | . |
|----------|
196. | .9977916 |
197. | .99781 |
198. | .9978471 |
199. | .9977698 |
200. | . |
|----------|
201. | .9978411 |
202. | .9978328 |
203. | . |
204. | .9978005 |
205. |.997833 |
|----------|
206. | .9978335 |
207. | . |
208. | .9977686 |
209. | . |
210. | . |
|----------|
211. | . |
212. | . |
213. | . |
214. |.997772 |
215. | .9978111 |
|----------|
216. | .9977958 |
217. | .9978339 |
218. | .9978251 |
219. | .9978151 |
220. | .9977771 |
|----------|
221. | .9978231 |
222. | . |
223. | . |
224. | .9977971 |
225. | . |
|----------|
226. | . |
227. | . |
228. | .9978367 |
229. | .9978374 |
230. | .9977773 |
|----------|
231. | .9978626 |
232. | .9977964 |
233. | .9978077 |
234. | . |
235. | .9978056 |
|----------|
236. | . |
237. | .9978071 |
238. | .9978529 |
239. | .9978108 |
240. | . |
|----------|
241. | . |
242. | . |
243. |.997824 |
244. | .9978472 |
245. | .9978251 |
|----------|
246. | . |
247. | .9978889 |
248. | . |
249. | .9978294 |
250. | .99784 |
|----------|
251. | .9978191 |
252. | .9978192 |
253. | .9978025 |
254. | . |
255. | .9978243 |
|----------|
256. | . |
257. | .9978149 |
258. | . |
259. | .9978379 |
260. | .9977903 |
|----------|
261. | . |
262. | .9978005 |
263. | . |
264. | .9978289 |
265. | . |
|----------|
266. | .9978657 |
267. | . |
268. | .9978433 |
269. | .9978412 |
270. | .9978085 |
|----------|
271. | .9978264 |
272. | . |
273. | .9978466 |
274. | . |
275. | .9978299 |
|----------|
276. | . |
277. | . |
278. | . |
279. | .9978549 |
280. | . |
|----------|
281. | .9978579 |
282. | .9978427 |
283. | .9978432 |
284. | .9978538 |
285. | . |
|----------|
286. | .9978394 |
287. | .9978108 |
288. | .9978092 |
289. | .9978231 |
290. | .9978085 |
|----------|
291. | .9978018 |
292. | . |
293. | .9978145 |
294. | .9978058 |
295. | . |
|----------|
296. | . |
297. | . |
298. | .9978288 |
299. |.997828 |
300. | . |
|----------|
301. | .9978032 |
302. | . |
303. | . |
304. | .9978389 |
305. | .9978507 |
|----------|
306. | .9978262 |
307. | . |
308. | .9977953 |
309. | .9978807 |
310. | . |
|----------|
311. | .9978597 |
312. | . |
313. | .9978688 |
314. | . |
315. | . |
|----------|
316. | .9977962 |
317. | . |
318. | .9978481 |
319. | .9977834 |
320. | .9978215 |
|----------|
321. | . |
322. | .9978006 |
323. | . |
324. |.997793 |
325. | .9978036 |
|----------|
326. | . |
327. | .9978092 |
328. | .9978709 |
329. | .9978029 |
330. | .9978178 |
|----------|
331. | . |
332. | . |
333. | .9978502 |
334. | .99784 |
335. | .9977987 |
|----------|
336. | .9978358 |
337. | .9978008 |
338. | . |
339. | . |
340. | .9977973 |
|----------|
341. | .9978225 |
342. | . |
343. | . |
344. | .9978254 |
345. |.997784 |
|----------|
346. | . |
347. | .9978063 |
348. | . |
349. | . |
350. | .9978245 |
|----------|
351. | . |
352. | .9977784 |
353. | .9977643 |
354. | .9977962 |
355. | .9978049 |
|----------|
356. | .9977652 |
357. | .9978036 |
358. | . |
359. |.997809 |
360. | . |
|----------|
361. | .9977904 |
362. | .9978369 |
363. | . |
364. | . |
365. | . |
|----------|
366. | . |
367. | . |
368. | .9978085 |
369. | .9978126 |
370. | .9978366 |
|----------|
371. | . |
372. | .9977953 |
373. | .9978065 |
374. | . |
375. | .9977995 |
|----------|
376. | .9977978 |
377. | .9977849 |
378. | .9977807 |
379. | .9978168 |
380. | . |
|----------|
381. | . |
382. | . |
383. | . |
384. | .9978138 |
385. | . |
|----------|
386. | .9977711 |
387. | .9978213 |
388. |.997777 |
389. | . |
390. | . |
+----------+

. 帖子字数有限制啊前面MLE的过程和代码我放到附件里了求会的小伙伴帮忙看看啊 感激不尽！！！