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From |
"Martin Weiss" <martin.weiss1@gmx.de> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: AW: Calculating area under a curve |

Date |
Fri, 27 Nov 2009 15:27:37 +0100 |

<> Would the -qqplot- recently advertised by NJC not be a good alternative? See http://www.stata.com/statalist/archive/2009-11/msg01157.html HTH Martin -----Ursprüngliche Nachricht----- Von: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Padmakumar Sivadasan Gesendet: Freitag, 27. November 2009 15:23 An: statalist@hsphsun2.harvard.edu Betreff: st: Calculating area under a curve Dear All, I am analyzing the performance of companies indicated by a variable v1. Variable v1 has a range 0-10 where higher values indicate poorer performance. I am attempting to compare the performance of companies for the country as a whole and to that at the local level (Metropolitan Statistical Area). I am interested not only in the mean value of v1 but also the variability of v1. One suggestion I got was to compute the cumulative probabilities at the national and local levels and then compare the area under the cumulative probability distributions at the local level to that at the national level. I understand that I can use the ?cumul- function in Stata to calculate the cumulative probabilities but I couldn?t find a method to calculate the area under the cumulative probability curve. I have two questions in this regard (1) Is there a way in Stata to calculate the area under cumulative probability curve? (2) Could someone point me to reference that I can use to read up on this method? Thanks Padmakumar * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**st: RE: AW: Calculating area under a curve***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

**References**:**st: Calculating area under a curve***From:*Padmakumar Sivadasan <pmathru2@illinois.edu>

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