[求助]500论坛币再求英文文献一篇

<p>As you can see from the link below, this is just a working paper. So you'd better ask the author instead or check&nbsp;similar papers&nbsp;by him. Let me give one here.</p><p><a href="http://people.few.eur.nl/mpvandijk/publications.htm">http://people.few.eur.nl/mpvandijk/publications.htm</a></p><p></p><br/>