Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: peer variable coefficient estimate nonsense
From
Nick Cox <[email protected]>
To
[email protected]
Subject
Re: st: peer variable coefficient estimate nonsense
Date
Thu, 1 Mar 2012 08:32:01 +0000
What is your story then explaining the _negative_ correlation? Have
you plotted the data in various ways to explore what is going on?
See also David Hoaglin's wise words at
http://www.stata.com/statalist/archive/2012-02/msg01269.html
Nick
On Thu, Mar 1, 2012 at 8:01 AM, Jian Zhang <[email protected]> wrote:
> Nick, thanks for your comment. the correlation between age and peer
> average age is quite high, about -0.7
>
>
> On Thu, Mar 1, 2012 at 3:56 PM, Nick Cox <[email protected]> wrote:
>> You need to think very carefully how to parameterise this. You don't
>> give any comment on how far these age variables are correlated. You
>> might be better off with a different representation, e.g. predictors
>> of
>>
>> age, (peer average - age)
>>
>> Nick
>>
>> On Thu, Mar 1, 2012 at 7:45 AM, Jian Zhang <[email protected]> wrote:
>>
>>> I was running a OLS regression of student scores on her/her own age
>>> and his/her peers' average age. The results show that the coefficient
>>> estimate of the peer average age is much much larger than own age
>>> estimate. This does not not seem to be plausible as one would believe
>>> that own age would matter much more than peer average age to own
>>> scores. any thoughts/comments? looks like whenever adding peer
>>> characteristics, the regression results does not make sense!
*
* 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/