>a panel of 6 observations  from 1970  to 1984
</p>
<p><em>number of observations</em> :  90
</p>
<p><em>observation</em> :  production units
</p>
<p><em>country</em> :  United States
</p>


<h3>Usage</h3>

<pre><code class='language-R'>data(Airline)</code></pre>


<h3>Format</h3>

<p>A dataframe containing :
</p>

<dl>
<dt>airline</dt><dd><p>airline</p>
</dd>
<dt>year</dt><dd><p>year</p>
</dd>
<dt>cost</dt><dd><p>total cost, in $1,000</p>
</dd>
<dt>output</dt><dd><p>output, in revenue passenger miles, 
ind