eventstudy2 stockid Date using security_returns, ret(sreturn) evwlb(-10) evwub(1
> 0) ///
> model(MA) marketfile(marketfile) mar(mreturn) idmar(marketid) car1LB(-10) car1UB
> (10) ///
> car2LB(-3) car2UB(3) ///
> car3LB(-1) car3UB(1) ///
> car4LB(-2) car4UB(2) ///
> car5LB(-5) car5UB(5) ///
> car6LB(-1) car6UB(10) ///
> car7LB(-4) car7UB(4) ///
> car8LB(-4) car8UB(10) ///
> car9LB(-8) car9UB(8) ///
> car10LB(-1) car10UB(5) ///
> eswlb(-110) eswub(-11) arfillevent replace
Generating dateline ...
...succeeded
Preparation of event list ...
...succeeded
Preparation of security return data...
...succeeded
Preparation of market and/or factor return data...
...succeeded
variables Date marketid do not uniquely identify observations in the using data
r(459);

请问这个该怎么解决呀？有知道的人吗？