请问在stata中输入命令“findit xxx”总是提示：(contacting http://www.stata.com)<br>
http://www.stata.com/websee.cgi?r=2&s=bds&o=w&j=a&k=xthreg could not be opened f> or read by copytextfile<br>
r(601);<br>
(click here to return to the previous screen)<br>
(end of search)<br>
是为什么 谢谢大家