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# re: st: twoway line

 From Christopher Baum To "statalist@hsphsun2.harvard.edu" Subject re: st: twoway line Date Sun, 7 Oct 2012 12:24:33 +0000

```<>
Lynn said

I run an OLS regression regarding returns to education.There are 20 years,
each year has its coefficient on returns o education. So, I want to plot a
graph, with year on x-axis  , each year's coefficient  on y-axis, and
confidence interval marked on the graph. How to create a data set that store
all coefficients in it, so, I can plot this picture easily?

-------------------
set more off
webuse grunfeld,clear
reg invest mvalue kstock i.year
margins year
mat b = r(b)'
svmat b
g yr = 1934 + _n if !mi(b1)
line b1 yr if !mi(b1)
--------------------

It would be quite straightforward to create this graph with confidence intervals,
using the e(V) matrix returned from -margins- and -twoway rline-.

Kit

Kit Baum   |   Boston College Economics & DIW Berlin   |   http://ideas.repec.org/e/pba1.html
An Introduction to Stata Programming  |   http://www.stata-press.com/books/isp.html
An Introduction to Modern Econometrics Using Stata  |   http://www.stata-press.com/books/imeus.html

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