frontier lnva lntoe lnshcap lndcap if(europe==1), distribution(tnormal) from(lntoe=0.4 lnshcap=0.2 lndcap=0.3)
For some reason, I am stuck with thousands of iteration at the same log-likelihood value with a message (not concave) and this goes on and on for hours. I have referrred to the manual and understood that specifying the difficult option might help, but it's not. I have tried the gradient option as well, but isn't helpful either. The worrying thing is that I have a friend who is running the same command on his laptop using the same dataset, and his process converges after 24 iterations. The 23rd and 24th iteration have the same value, which I believe, should, at this point stop the convergence and produce the results. But the 25th and all other iterations are taking the same value as the 24th iteration, and producing the same message "(not concave)"
The only difference between me and my friend is I am using stata version 8.2 and he is using version 8.0. I tried running it under version 8.0 as well, but in vain. Can anybody please help in explaining what could be causing the problem? Could it be down to PC capabilities or some setting within my PC? I am operating stata under windows 98.
Many thanks for your help.
Dev
>>> [email protected] 06/21/04 04:40pm >>>
Almost 26,000 ado-files were downloaded from SSC in May, representing
the efforts of 141 members of the Stata user community. The details:
npkghit author package
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21. 114.50 Enzo Coviello STKERHAZ
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125. 38.00 Nicholas J. Cox DUPS
126. 38.00 Thomas Steichen METAAGGR
127. 38.00 Jon Deeks METAAGGR
128. 38.00 Matteo Bottai ROCSS
129. 38.00 Nicholas J. Cox ADJACENT
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131. 37.00 Nicholas J. Cox HBAR
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151. 32.00 Philippe Van Kerm GLCURVE7
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156. 31.00 David Clayton HOTDECK
157. 31.00 Philippe Van Kerm MCA
158. 31.00 Adrian Mander HOTDECK
159. 31.00 Stephen P. Jenkins SPSURV
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162. 30.00 Christopher F Baum OUTTABLE
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author npkghit
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2. Christopher F Baum 2619.52
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5. Stephen P. Jenkins 515.00
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12. Edwin Leuven 305.67
13. Enzo Coviello 299.17
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16. Jan Brogger 285.60
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18. Adrian Mander 253.67
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21. Dan Blanchette 231.86
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23. Gregorio Impavido 215.00
24. Patrick Royston 211.87
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28. Michael Blasnik 183.00
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32. Zhiqiang Wang 162.00
33. J. Sky David 147.00
34. Herve M. Caci 133.00
35. Charles Morris 128.00
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38. John Hendrickx 122.30
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43. Stanislav Kolenikov 97.00
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48. Silvia Montoya 94.50
49. Rory Wolfe 94.00
50. Ulrich Kohler 91.50
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52. Bill Sribney 84.33
53. Philip B. Ender 82.00
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55. Jonah B. Gelbach 75.50
56. Ian Watson 71.67
57. Paul Seed 71.50
58. Tony Brady 71.00
59. Matteo Bottai 70.00
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63. Mario Cleves 56.00
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66. Eileen Wright 52.10
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68. Fred Zimmerman 49.50
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93. Lee E. Sieswerda 25.00
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95. Jeph Herrin 25.00
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100. Kenneth Higbee 23.00
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