sempl specifies a variable indicating whether or not the respondent is self-employed. A 1 indicates
self-employment, all other values are ignored. 这里讲了,就是要生成一个虚拟变量,表明被访者是否是自雇。
supvis specifies a variable indicating the number of employees the respondent supervises. The values 1 and 10
are significant for placement in certain EGP categories.这里生成一个连续变量,由1到10,表明被访者监督的人数。
然后再把这两个变量分别放入相应的sempl() supvis() 括号里就可以了。