Hi:<br /><br />I have uploaded your edited document and hope that you find the editing suggestions helpful. If you have any questions, please send a message to me via Editor World.<br /><br />With this document I didn't use track changes, because I re-wrote most of it, cutting it down to a single page, the preferred length for a letter of reference.<br /><br />I wasn't sure if Cao still works at HEG, so just change the tense if it is incorrect (was to is, for example).&nbsp;<br /><br />I think I captured Cao's outstanding abilities without being repetitive. In any case, if I had a Ph.D in economics, I wouldn't mind having HEG for my referee.<br /><br />&nbsp;<br />Best wishes - TypeRighter (aka George)<br /><br />