我已经下载了xtptm程序包，xtptm里面有个readme
Note:
(1) Data must be balanced panel data.
(2) You need download moremata firstly.
然后我去下载了moremata程序包，可是moremata里面没有ado文件，不知道怎么加载，moremata里面readme
Recommended installation procedure:
Type -ssc install moremata, replace- in Stata.
Alternative installation procedure (if you cannot
use -ssc- due to firewall issues, etc.):
1. Download moremata.zip.
2. Unzip moremata.zip into a temporary directory on
    your hard disk (e.g. c:\temp).
3. Start Stata and type -net from c:\temp- or
    wherever you unzipped the files.
4. Type -net install moremata, replace-.
没看明白怎么回事啊，请教高手指导下，因为自己都是用eviews，现在需要门限面板数据模型，实在是菜鸟啊，先谢谢留言的同学们啊！非常感激！