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RE: st: growth rates
From
"Bornmann, Lutz" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
RE: st: growth rates
Date
Fri, 7 Mar 2014 14:02:36 +0000
Thanks, Marten for this first solution.
Nick, I am looking for advice on how to measure growth. Martens solution standardizes the annual changes in publication numbers. Are there other options and how can I get an overall growth value with which I can compare several countries?
Lutz
>-----Original Message-----
>From: [email protected] [mailto:owner-
>[email protected]] On Behalf Of Nick Cox
>Sent: Friday, March 07, 2014 2:24 PM
>To: [email protected]
>Subject: Re: st: growth rates
>
>I don't get this. Do you have a definition of growth rate and want
>Stata code for this or do you want advice on how to measure it?
>
>For example, if something can ever be zero or negative, then even
>
>change in value / previous value
>
>can not be a good idea, because growing from -1 to 0 gives growth rate
>of -1 and growing from 0 to 1 gives an indeterminate value.
>
>so even that is not a universal.
>Nick
>[email protected]
>
>
>On 7 March 2014 13:12, Bornmann, Lutz <[email protected]> wrote:
>> Hi,
>>
>> I do have annual publication numbers for several countries:
>>
>> ITEM_PY us' ch'
>> 1990 3759 119
>> 1991 3738 149
>> 1992 3757 149
>> 1993 3810 169
>> 1994 3920 199
>> 1995 4134 171
>> 1996 4404 211
>> 1997 4436 236
>> 1998 4513 246
>> 1999 4542 238
>> 2000 4456 275
>> 2001 4519 263
>> 2002 4602 259
>> 2003 4705 276
>> 2004 4836 310
>> 2005 4834 337
>> 2006 5150 344
>> 2007 5253 433
>> 2008 5568 466
>> 2009 5520 475
>> 2010 5690 534
>>
>> I would like to calculate growth rates. What is the best (and simplest)
>statistical procedure to do that?
>>
>> Thank you,
>>
>> Lutz
>>
>> *
>> * For searches and help try:
>> * http://www.stata.com/help.cgi?search
>> * http://www.stata.com/support/faqs/resources/statalist-faq/
>> * http://www.ats.ucla.edu/stat/stata/
>*
>* For searches and help try:
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>* http://www.stata.com/support/faqs/resources/statalist-faq/
>* http://www.ats.ucla.edu/stat/stata/
*
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* http://www.ats.ucla.edu/stat/stata/