Cazals, Catherine <br/><br/>
Scale economies and natural monopoly in the postal delivery: comparison between parametric and non parametric specifications 

 - Anatole, France  Institute of Industrial Economics  1996 
 - 21p 
 - IDEI Discussion Papers .
<br/><br/><label>ISBN: </label>
<br/><br/><label>Dewey Class. No.: </label>DP No. 58