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# AW: st: re: Inequality of education: ineqdec0?

 From "Martin Weiss" To Subject AW: st: re: Inequality of education: ineqdec0? Date Fri, 19 Feb 2010 15:50:34 +0100

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Mind http://www.stata.com/statalist/archive/2010-02/msg00840.html

HTH
Martin

-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Francesco
Burchi
Gesendet: Freitag, 19. Februar 2010 15:48
An: statalist@hsphsun2.harvard.edu
Betreff: Re: st: re: Inequality of education: ineqdec0?

Dear Martin,

Than you for the interesting point you raise. However, this does not
seem to be an issue in my case because I am analyzing the changes in
inequality in Peru during the crisis of end 1980s-beginning of 1990s. It
seems that the average years of education fall for most of the groups
and inequality slightly raises. My idea was to use different inequality
indices, such as the Gini, Entropy, as well as the coefficient of
variation, which, as you suggest, takes into consideration the average
years of education since it is given by the standard deviation divided
by the mean. My question is: can I simply use the "ineqdec0 EDU" command
to compute the Gini for years of schooling? Any suggestion on other
indices?

Thanks,
Francesco

--- On Thu, 18/2/10, Francesco Burchi wrote:
> I am using individual data to calculate inequality of
> educational participation across people in a country
> in 3 different year. I would like to compute the Gini
> coefficient and possibly other indices of inequality
> on the variable "years of schooling". Can I use the
> simple command:
> Ineqdec0 EDU ?
>
> The problems is that years of schooling is a discrete
> variable, which presents many 0-values, and I am not
> sure whether I can use the same procedure used for
> computing income inequality. Moreover, can I compare
> directly the indices for the three years?
...[show rest of quote]

One problem you would need to consider is that any
changes in inequality over time will be influenced by
educational expansion, i.e. more recent cohorts get more
education than older cohorts. So what usualy happens is
that initially there isn't much inequality because a
large portion of the population was bunched at the lowest
level (i.e. everybody is equally misserable). In later
cohorts people get more education, which means that there
is more possibility to differ from one another, and thus
inequality increases. So, if you see an increase in
inequality over time you need to ask yourself, do I see
an increase in inequality or an increase in the average
level of education? In my sub-discipline such an increase
in inequality would be considered a trivial consequence of
educational expansion. At least you would need to discuss
the relation between inequality and changes the average
level of education. One way to do so is to show how the
distribution of education changes over time. You could a
stacked bar chart for that.

Hope this helps,
Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------

Dear Statalisters,

I am using individual data to calculate inequality of educational
participation across people in a country in 3 different year. I would
like to compute the Gini coefficient and possibly other indices of
inequality on the variable "years of schooling". Can I use the simple
command:
Ineqdec0 EDU ?

The problems is that years of schooling is a discrete variable, which
presents many 0-values, and I am not sure whether I can use the same
procedure used for computing income inequality. Moreover, can I compare
directly the indices for the three years?

Thanks,
Francesco

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