我用的是stata11,首先我保证数据输入路径没错，格式.dta也没有问题，因为用同样的方法能打开其他小的文件。所以应该是数据太大了，有9M。
输入 use merge1.dta, clear后显示如下：
no room to add more observations
    An attempt was made to increase the number of observations beyond what is
    currently possible.  You have the following alternatives:

     1.  Store your variables more efficiently; see help compress.  (Think of Stata's
         data area as the area of a rectangle; Stata can trade off width and length.)

     2.  Drop some variables or observations; see help drop.

     3.  Increase the amount of memory allocated to the data area using the set memory
         command; see help memory.
r(901);
恳请高人给予解答，最近急用。