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

<h2>
Wagner's Hannover Employment Growth Data
</h2>

<h3>Description</h3>


<p>Wagner (1994) investigates the rate of employment growth (<code>y</code>) as
function of percentage of people engaged in <B>p</B>roducation
<B>a</B>ctivities (<code>PA</code>) and <B>h</B>igher <B>s</B>ervices
(<code>HS</code>) and of the <B>g</B>rowth of these percentages (<code>GPA</code>,
<code>GHS</code>) during three time periods in 21 geographical regions of
the greater Hannover area.
</p>


<h3>Usage</h3>

<pre>data(wagnerGrowth)</pre>


<h3>Format</h3>


<p>A data frame with <i>21 * 3 = 63</i> observations
(one per <code>Region x Period</code>) on the following 7 variables.
</p>

<dl>
<dt><code>Region</code></dt><dd><p>a <code>factor</code> with 21 levels, denoting
the corresponding region in Hannover (conceptually a &ldquo;block
factor&rdquo;).</p>
</dd>
<dt><code>PA</code></dt><dd><p>numeric: percent of people involved in production activities.</p>
</dd>
<dt><code>GPA</code></dt><dd><p><B>g</B>rowth of <code>PA</code>.</p>
</dd>
<dt><code>HS</code></dt><dd><p>a numeric vector</p>
</dd>
<dt><code>GHS</code></dt><dd><p>a numeric vector</p>
</dd>
<dt><code>y</code></dt><dd><p>a numeric vector</p>
</dd>
<dt><code>Period</code></dt><dd><p>a <code>factor</code> with levels <code>1:3</code>,
denoting the time period, 1 = 1979-1982, 2 = 1983-1988, 3 = 1989-1992.</p>
</dd>
</dl>



<h3>Source</h3>


<p>Hubert, M. and Rousseeuw, P. J.  (1997).
Robust regression with both continuous and binary regressors,
<EM>Journal of Statistical Planning and Inference</EM> <B>57</B>, 153&ndash;163.
</p>


<h3>References</h3>


<p>Wagner J. (1994).
Regionale Beschäftigungsdynamik und höherwertige
Produktionsdienste: Ergebnisse für den Grossraum Hannover (1979-1992).
<EM>Raumforschung und Raumordnung</EM> <B>52</B>, 146&ndash;150.
</p>


<h3>Examples</h3>

<pre>
data(wagnerGrowth)
## maybe
str(wagnerGrowth)


require(lattice)
(xyplot(y ~ Period | Region, data = wagnerGrowth,
         main = "wagnerGrowth: 21 regions @ Hannover"))

(dotplot(y ~ reorder(Region,y,median), data = wagnerGrowth,
         main = "wagnerGrowth",
         xlab = "Region [ordered by  median(y | Region) ]"))
</pre>


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