请教前辈，不放回随机抽样，相同组别的样本算一个一同提取，该怎样的命令呢？谢谢！

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请教前辈，下面是我的两年的企业数据，i_id_in_source是企业的唯一识别符号，id识别是否是同一个企业，如果id相同，则为同一家企业，newid是group id生成的变量，indicate识别企业是否是处理组。我想在indicate等于0的样本中进行不放回随机抽样，每次抽50个样本，抽10次，每次抽取的50个样本中要包含100条数据，也就是抽取50个id在2005、2006两年的数据。请问这样的stata命令是怎样的呢，万分感谢！

1. * Example generated by -dataex-. To install: ssc install dataex
   
2. clear
   
3. input str11 i_id_in_source float year str15 id float(newid indicate)
   
4. "2005_13010" 2005 "05403779X"  1 0
   
5. "2006_12364" 2006 "05403779X"  1 0
   
6. "2005_177"   2005 "100013968"  2 0
   
7. "2006_184"   2006 "100013968"  2 0
   
8. "2005_4357"  2005 "104322397"  3 0
   
9. "2006_3802"  2006 "104322397"  3 0
   
10. "2005_4358"  2005 "104323197"  4 0
    
11. "2006_3803"  2006 "104323197"  4 0
    
12. "2005_4360"  2005 "104323242"  5 0
    
13. "2006_3805"  2006 "104323242"  5 0
    
14. "2005_4361"  2005 "104323402"  6 0
    
15. "2006_3806"  2006 "104323402"  6 0
    
16. "2005_4362"  2005 "104326080"  7 0
    
17. "2006_3807"  2006 "104326080"  7 0
    
18. "2005_4363"  2005 "104333096"  8 0
    
19. "2006_3808"  2006 "104333096"  8 0
    
20. "2005_4365"  2005 "104336393"  9 1
    
21. "2006_3810"  2006 "104336393"  9 1
    
22. "2005_4367"  2005 "104360166" 10 0
    
23. "2006_3812"  2006 "104360166" 10 0
    
24. "2005_4370"  2005 "104364503" 11 0
    
25. "2006_3815"  2006 "104364503" 11 0
    
26. "2005_4371"  2005 "104365389" 12 0
    
27. "2006_3816"  2006 "104365389" 12 0
    
28. "2005_4372"  2005 "104365522" 13 0
    
29. "2006_3817"  2006 "104365522" 13 0
    
30. "2005_4374"  2005 "104365784" 14 0
    
31. "2006_3819"  2006 "104365784" 14 0
    
32. "2005_4375"  2005 "104367181" 15 0
    
33. "2006_3820"  2006 "104367181" 15 0
    
34. "2005_4377"  2005 "104380570" 16 0
    
35. "2006_3822"  2006 "104380570" 16 0
    
36. "2005_4381"  2005 "104383237" 17 0
    
37. "2006_3826"  2006 "104383237" 17 0
    
38. "2005_4384"  2005 "104401132" 19 0
    
39. "2006_3830"  2006 "104401132" 19 0
    
40. "2005_4385"  2005 "104406005" 20 0
    
41. "2006_3831"  2006 "104406005" 20 0
    
42. "2005_4386"  2005 "104406064" 21 0
    
43. "2006_3832"  2006 "104406064" 21 0
    
44. "2005_4387"  2005 "104406152" 22 0
    
45. "2006_3833"  2006 "104406152" 22 0
    
46. "2005_4388"  2005 "104406275" 23 0
    
47. "2006_3834"  2006 "104406275" 23 0
    
48. "2005_4389"  2005 "104406312" 24 0
    
49. "2006_3835"  2006 "104406312" 24 0
    
50. "2005_4392"  2005 "104407032" 25 0
    
51. "2006_3837"  2006 "104407032" 25 0
    
52. "2005_4396"  2005 "104407876" 27 0
    
53. "2006_3841"  2006 "104407876" 27 0
    
54. "2005_4397"  2005 "10440849X" 28 0
    
55. "2006_3842"  2006 "10440849X" 28 0
    
56. "2005_4399"  2005 "104408908" 29 1
    
57. "2006_3844"  2006 "104408908" 29 1
    
58. "2005_4402"  2005 "104409695" 30 1
    
59. "2006_3847"  2006 "104409695" 30 1
    
60. "2005_4403"  2005 "104409775" 31 0
    
61. "2006_3848"  2006 "104409775" 31 0
    
62. "2005_4408"  2005 "104410661" 32 0
    
63. "2006_3851"  2006 "104410661" 32 0
    
64. "2005_4409"  2005 "104410813" 33 0
    
65. "2006_3852"  2006 "104410813" 33 1
    
66. "2005_4410"  2005 "104410848" 34 0
    
67. "2006_3853"  2006 "104410848" 34 0
    
68. "2005_4411"  2005 "104410880" 35 0
    
69. "2006_3854"  2006 "104410880" 35 0
    
70. "2005_4415"  2005 "104412042" 36 0
    
71. "2006_3857"  2006 "104412042" 36 0
    
72. "2005_4417"  2005 "104413248" 37 0
    
73. "2006_3859"  2006 "104413248" 37 0
    
74. "2005_4418"  2005 "104414144" 38 0
    
75. "2006_3860"  2006 "104414144" 38 0
    
76. "2005_4422"  2005 "104416932" 39 1
    
77. "2006_3864"  2006 "104416932" 39 1
    
78. "2005_4425"  2005 "104423067" 40 0
    
79. "2006_3868"  2006 "104423067" 40 0
    
80. "2005_4426"  2005 "104424131" 41 0
    
81. "2006_3869"  2006 "104424131" 41 0
    
82. "2005_4431"  2005 "104435383" 42 0
    
83. "2006_3874"  2006 "104435383" 42 0
    
84. "2005_4432"  2005 "104436183" 43 1
    
85. "2006_3875"  2006 "104436183" 43 1
    
86. "2005_4435"  2005 "104442372" 44 0
    
87. "2006_3878"  2006 "104442372" 44 0
    
88. "2005_4436"  2005 "104442604" 45 0
    
89. "2006_3879"  2006 "104442604" 45 0
    
90. "2005_4437"  2005 "104450460" 46 0
    
91. "2006_3880"  2006 "104450460" 46 0
    
92. "2005_4438"  2005 "104475975" 47 1
    
93. "2006_3881"  2006 "104475975" 47 1
    
94. "2005_71549" 2005 "104501336" 48 1
    
95. "2006_69156" 2006 "104501336" 48 1
    
96. "2005_4440"  2005 "104503219" 49 1
    
97. "2006_3882"  2006 "104503219" 49 1
    
98. "2005_4443"  2005 "104507535" 50 0
    
99. "2006_3885"  2006 "104507535" 50 0
    
100. "2005_4444"  2005 "104530479" 51 0
     
101. "2006_3886"  2006 "104530479" 51 0
     
102. "2005_4445"  2005 "104531797" 52 0
     
103. "2006_3887"  2006 "104531797" 52 0
     
104. end

复制代码

------------------ copy up to and including the previous line ------------------

Listed 100 out of 5944 observations
Use the count() option to list more

.

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关键词：企业数据 随机抽样 识别符 企业数 条数据

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