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

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

Subject |
st: AW: Stata gives no result for Std. Err, t, P>|t| or Conf. Interval. (Master Thesis - help needed) |

Date |
Thu, 6 Aug 2009 12:06:31 +0200 |

<> As Eric rightly said http://www.stata.com/statalist/archive/2009-08/msg00110.html : You seem to have a perfect fit. Note the list policy on reposts, though... Try the code below to see that this could well be the source of all your troubles... ************* clear* set obs 10000 //generate perfect fit gen x= rnormal() //so no error // in the data //generating process... gen y=3+2*x //regress cannot give ses reg y x //graphic representation twoway (scatter y x) /* */ (lfit y x) ************* HTH Martin -----Ursprüngliche Nachricht----- Von: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Bianca Claassen Gesendet: Donnerstag, 6. August 2009 12:03 An: statalist@hsphsun2.harvard.edu Betreff: st: Stata gives no result for Std. Err, t, P>|t| or Conf. Interval. (Master Thesis - help needed) Hello, I would like to ask for some help with my master thesis since I do not have a lot of Stata experience. I would really appreciate your help! I am trying to run regressions with my data but somehow it does give me the coefficient but no result for Std. Err, t, P>|t| or Conf. Interval. The regression is: (O_giz-O_niz )=α+ β_n (X_gz-X_nz )+∑_(z=1)^Z〖γ_z c_z 〗+ε_n reg delta_sic delta_age delta_quality delta_rba id_*, robust Where the depended variable (delta_sic) is the difference between the square footage a certain industry occupies in green building g, as a percentage of the total occupied space in the building, compared to the fraction of the total occupied space it rents in control building n in cluster z. A vector of the differences in hedonic characteristics of the green sample versus the control sample, (X_gz-X_nz), accounts for differences in building size, quality and age. c_z is a dummy variable with a value of one if a building is located within a specific building cluster z and zero otherwise. Clusters were formed for each one of the green building and includes all conventional office buildings within a quarter mile radius of it. Finally, α, β_n and γ_z are estimated coefficients and ε_n the error term. This means that: delta_sic = is a value between 0 and 1 delta age, delta_quality and delta_rba are the characteristics and take values between -100 and 100 which are multiplied by dummy variables (that are there to identify the cluster the buildings belong to) id_* = the cluster identification variable (every green id has a related dummy variable so that the control variables can be linked to it) What am I doing wrong that my regression does not yield any Std. Err, t, P>|t| or Conf. Interval? I would really appreciate help because I am trying to write my master thesis and do not have much experience with Stata. Thank you in advance. Bianca ---------------------------------------------------------- reg delta_sic6 delta_age delta_quality delta_rba id_*, robust Linear regression Number of obs = 798 F( 0, 0) = . Prob > F = . R-squared = 1.0000 Root MSE = 0 ------------------------------------------------------------------------------ | Robust delta_sic6 | Coef. Std. Err. t P>|t| [95% Conf. Interval] -------------+---------------------------------------------------------------- delta_age | -.0000587 . . . . . delta_qual~y | -.0186775 . . . . . delta_rba | .0142273 . . . . . id_109 | -.0749682 . . . . . id_110 | -.0081043 . . . . . id_111 | -.0358519 . . . . . id_112 | .300693 . . . . . id_113 | -.0222221 . . . . . id_114 | -.0213012 . . . . . id_116 | .079335 . . . . . id_117 | .0213555 . . . . . id_118 | (dropped) id_119 | -.0012657 . . . . . id_120 | -.0064438 . . . . . id_121 | -.000078 . . . . . id_122 | (dropped) id_123 | (dropped) id_124 | -.043714 . . . . . id_125 | .0054831 . . . . . id_126 | .0061213 . . . . . id_127 | -.0099928 . . . . . id_128 | (dropped) id_130 | .0058896 . . . . . id_131 | .0341311 . . . . . id_132 | (dropped) id_133 | -.1664293 . . . . . id_134 | -.1653741 . . . . . id_135 | -.1742016 . . . . . id_136 | .0058644 . . . . . id_137 | -.0024823 . . . . . id_138 | -.0077241 . . . . . id_139 | -.0080733 . . . . . id_140 | .0030768 . . . . . id_141 | .0066013 . . . . . Etc. * * 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/

**References**:**st: Stata gives no result for Std. Err, t, P>|t| or Conf. Interval. (Master Thesis - help needed)***From:*Bianca Claassen <thesis.bu@gmail.com>

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