由一年中12个月的收益率算ar的时候,我下面的程序做完了,为什么每支股票每年的ar 都有12个呢,应该是只有一年的总数据啊.有没有作过的同学proc sql;
create table ar as
select stkcd, year, Mretwdtl,sum(logir) as sir, sum(logmr) as smr from car4
group by stkcd, year1;
quit;
楼主: suly
|
10500
19
超额收益率的计算 |
博士生 19%
-
|
| ||
| ||
Let them be hard, but never unjust
|
||
| ||
| ||
Let them be hard, but never unjust
|
||
Don't get lost in technical details. What is the big picture?
|
|
京ICP备16021002-2号 京B2-20170662号 京公网安备 11010802022788号 论坛法律顾问:王进律师 知识产权保护声明 免责及隐私声明