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<table width="100%" summary="page for Star"><tr><td>Star</td><td align="right">R Documentation</td></tr></table>

<h2>Effects on Learning of Small Class Sizes </h2>

<h3>Description</h3>


<p>a cross-section from 1985-89
</p>
<p><EM>number of observations</EM> :  5748
</p>
<p><EM>observation</EM> :  individuals
</p>
<p><EM>country</EM> :  United States
</p>


<h3>Usage</h3>

<pre>data(Star)</pre>


<h3>Format</h3>

<p>A dataframe containing :
</p>

<dl>
<dt>tmathssk</dt><dd><p>total math scaled score</p>
</dd>
<dt>treadssk</dt><dd><p>total reading scaled score</p>
</dd>
<dt>classk</dt><dd><p>type of class, a factor with levels (regular,small.class,regular.with.aide)</p>
</dd>
<dt>totexpk</dt><dd><p>years of total teaching experience</p>
</dd>
<dt>sex</dt><dd><p>a factor with levels (boy,girl)</p>
</dd>
<dt>freelunk</dt><dd><p>qualified for free lunch ?</p>
</dd>
<dt>race</dt><dd><p>a factor with levels (white,black,other)</p>
</dd>
<dt>schidkn</dt><dd><p>school indicator variable</p>
</dd>
</dl>



<h3>Source</h3>


<p>Project STAR <a href="http://www.heros-inc.org/star.htm">http://www.heros-inc.org/star.htm</a>.
</p>


<h3>References</h3>


<p>Stock, James H.  and  Mark W.  Watson (2003) <EM>Introduction to Econometrics</EM>, Addison-Wesley Educational Publishers, <a href="http://wps.aw.com/aw_stockwatsn_economtrcs_1">http://wps.aw.com/aw_stockwatsn_economtrcs_1</a>, chapter 11.
</p>


<h3>See Also</h3>

<p><code>Index.Source</code>, <code>Index.Economics</code>, <code>Index.Econometrics</code>, <code>Index.Observations</code></p>


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