[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: RE: Obs per Group for xtregar

From   "Rodrigo Alfaro A." <>
To   <>
Subject   st: RE: Obs per Group for xtregar
Date   Wed, 26 Mar 2008 13:42:55 -0300


You could learn about the observations used by 
Stata with e(sample). For example:

sysuse auto
reg price mpg if foreign==1
list price mpg foreign if e(sample)

About the minimum 1, it is possible that you
have missing data in your x variables. If not
you could have missing values in between which
implies less available observations. For
example, you have y for t=1, 3, 5 and 6. Then 
you have 4 obs for that group but only 1 pair
is useful for the AR(1) model.



De: [] En nombre de Lisa McGuff
Enviado el: Miércoles, 26 de Marzo de 2008 12:21 p.m.
Asunto: st: Obs per Group for xtregar

I'm using xtregar and having trouble identifying which records Stata is using and which it is dropping.  The max obs per group is one less than the actual maximum number of observations in my data, which makes sense to me.  The minimum however is listed as 1 and I don't understand this.  The least number of observations in a group of my raw data is 34.  I have no missing values.  My panel is unbalanced, with gaps throughout the data if that matters.  When does Stata drop observations?



ADVERTENCIA: La  información  contenida  en  esta  transmisión, y  en  cualquier archivo  adjunto, está  sujeta a reserva legal conforme a la normativa aplicable  al  Banco  Central  de  Chile, y  no  puede  ser usada o difundida  por personas distintas  de  su o sus destinatarios. Si usted ha recibido esta transmisión por error,  por  favor  notifique  inmediatamente al remitente respondiendo por este mismo medio y elimínela de su sistema.
El  Banco Central de Chile no se hará responsable de la exactitud y veracidad de la información contenida en este mensaje, así  como  de su  modificación, copia, divulgación  o  reenvío,  total  o  parcial.   Su  uso  no  autorizado puede ser sancionado de conformidad con las leyes chilenas. 
El  Banco  Central  de  Chile  transmite  sus decisiones a través de comunicados oficiales, los  que  pone  a  disposición  del público en su página de Internet: 

DISCLAIMER: The information  contained  in  this  email or any attached file, is subject to legal  privilege  pursuant  to the laws and regulations applicable to the Central  Bank  of  Chile , and may not be used or disseminated by any person other  than  its  intended recipients. If you have received this transmission in error, please  notify  the sender immediately by reply to this email address and delete it from your system.
The Central Bank  of  Chile shall not be liable for the accuracy or authenticity of the contents of this message, whether amended, copied, forwarded or disclosed in  any  form, in  whole  or  in part.  Please note that unauthorized use may be penalized  in  conformity  with  the  Chilean law.    
The Central  Bank of Chile communicates its decisions by  official releases, and 
makes them available to the public in its WebPages:

*   For searches and help try:

© Copyright 1996–2019 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index