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st: RE: statalist-digest V4 #1570


From   Trinh Le <[email protected]>
To   [email protected]
Subject   st: RE: statalist-digest V4 #1570
Date   Sat, 10 Apr 2004 16:51:04 +1200

Hi Nick
Thank you kindly

Trinh
------------------------------

Date: Sat, 3 Apr 2004 17:15:02 +0100
From: "Nick Cox" <[email protected]>
Subject: st: RE: dagumfit

I guess you're using Stata 8 and the -dagumfit- 
program published by Stephen Jenkins in STB-48
or available on SSC. 

As is documented in its help, -dagumfit- leaves
behind estimates of its parameters in global 
macros S_b, S_d, S_h. Therefore you can superimpose
a density estimate on a histogram by doing something 
like this: 

u auto
dagumfit mpg 
histogram mpg , plot(function /// 
	(($S_b*$S_d*$S_h)*x^(-$S_d-1)]/[1 + $S_h*x^(-$S_d))^($S_b+1), ra(mpg)) 

Stephen will be talking in Berlin on Monday on his work 
on income distribution fitting: see
http://www.stata.com/support/meeting/2german/abstracts.html#jenkins

The work now includes 4 parameter distributions. I can't say at what
point all related programs will be made public. 

Nick 
[email protected] 

V�n Tr�nh

> I'd like to impose a dagum fitted curve on my histogram (of an income
> variable). Would you adivise me how to to that please?
> 
> To Stepehn and Nick - thanks very much for having written the 
> programmes on
> dagumfit and pdagum, qdagum. Have you written a similar 
> programme on the 4
> parameter Dagum model at all?

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