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st: working with panel data in Stata
From
olorunfemi sola <[email protected]>
To
[email protected]
Subject
st: working with panel data in Stata
Date
Sat, 17 Mar 2012 09:03:04 +0000 (GMT)
Dear All,
Am working with panel data. The data are as follows:
id time ep dep lr
lagos 2000 10 11 12
lagos 2001 8 12 13
lagos 2002 9 9 9
lagos 2003 7 10 12
ondo 2000 10 8 10
ondo 2001 8 12 13
ondo 2002 10 11 14
ondo 2003 7 10 11
ife 2000 9 11 12
ife 2001 8 8 11
ife 2002 9 10 12
ife 2003 10 9 12
But when i give this command --------" tsset id time " it gave the following error:
tsset id time
varlist: id: string variable not allowed
r(109)
Expecting your assistance.
***********************************************************************
SOLA OLORUNFEMI Ph.D
SENIOR LECTURER
DEAPARTMENT OF ECONOMICS
ADEKUNLE AJASIN UNIVERSITY
AKUNGBA AKOKO
ONDO STATE NIGERIA
official e-mail: [email protected]
TEL NO +234 803 581 0893
**********************************************************************
________________________________
From: Nick Cox <[email protected]>
To: [email protected]
Sent: Friday, 16 March 2012, 23:46
Subject: Re: st: Confirming whether a variable is binary or continuous
My wording was sloppy. That test is satisfied also by one distinct
value. For there to be precisely two distinct values, it is also
necessary for -var[1]- to differ from -var[_N]-.
Similarly the test -inlist(var, 0, 1)- is satisfied if -var- is always
0 or if -var- is always 1.
Nick
On Sat, Mar 17, 2012 at 7:05 AM, Nick Cox <[email protected]> wrote:
> Variations on this are often used inside Stata commands
>
> sort var
> assert var == var[1] | var == var[_N]
>
> Here -var- must be one of two distinct values, but nothing specifies
> what they are precisely.
>
> Nick
>
> On Fri, Mar 16, 2012 at 11:39 PM, daniel klein
> <[email protected]> wrote:
>> Nick,
>>
>> very smart solution, thanks. Seems it is often the simple solutions
>> that are so hard to find.
>>
>> The difference to the "-tabulate- solution" is that <var> is allowed
>> to be a constant here, which is perfectly alright for a binary
>> variable. It is for Bert to decide whether the indicators are allowed
>> to be constant or have to vary.
>>
>> Daniel
>>
>> --
>> You can also do this by e.g.
>>
>> assert inlist(var, 0. 1)
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