Re: st: policy simulation

[Nick Winter <njgwinter@gmail.com>]

Based on a quick look, I think appropriate calls to the -margins- 
command would give you the raw materials for that table.  Producing the 
table would take some assembly.

-marginsplot-, after -margins-, might give the raw materials for an even 
better display of those basic results.  But again, it would take some 
bonding with the possibilities of the command.

- Nick


On 7/26/2012 7:29 PM, Shikha Sinha wrote:
> Thanks Nick, Dan, and Maarten.
>
> I guess there is no specific command to do this in stata. However, it
> is very common in health economics research to do some sort of policy
> simulation. For example, what would happen to child mortality if
> vaccination rate is increased by 10% or 20%.
>
> Essentially, I was trying to estimate Table 8 in the following paper:
>
>   and http://www.ifpri.org/sites/default/files/publications/dp70.pdf
>
> Thanks,
> Shikha
> On Wed, Jul 25, 2012 at 7:56 AM, Nick Winter <njgwinter@gmail.com> wrote:
> > Or,
> >
> > . regress y X1 X2 i.ORT
> >
> > . margins ORT
> >
> > --Nick Winter
> >
> > On 7/25/2012 10:12 AM, Dan Waldo wrote:
> > > Maarten's observation from yesterday is quite correct.
> > > But if you mis-spoke and you really want to look at the effect on your
> > > dependent variable of everybody having ORT=1, a clunky way to do this
> > > (assuming that X1 and X2 are uncorrelated with ORT) would be to use the
> > > predict command to generate the estimated y (say, y_hat) and then
> > >
> > > . gen policy_effect =y_hat-(b1*x1 + b2*x2 + b3) [you'd pull the
> > > coefficients from the e(b) vector ]
> > >
> > >
> > >
> > > On Tue, Jul 24, 2012 at 2:46 AM, Shikha Sinha wrote:
> > > > I want to conduct a counterfactual policy simulation in state. I
> > > > estimate the following model:
> > > >
> > > > Y = b1X1 + b2X2 +b3ORT +e
> > > >
> > > > ORT is the main independent variable and is binary. The estimated b3
> > > > coefficient is 0.06. Now I want to answer the counterfactual question:
> > > > what would have been b3 if everyone got access to ORT? How do I get
> > > > this?
> > > *
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> >
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