invalid syntax
请问各位大神,我的问题出在哪里呢?
```
- local varlist dominst domper Ln_Ksize SOE Liquidity Ln_RE FirmAge FIXED Share Market Growth
- local k=7
- local max_r2=0
- local best_vars
- forvalues i=1/`=combin(`=wordcount("`$varlist'")',`k')'{
- local vars:word `i'of `=varlist'
- reghdfe depvar ` Lntotal ',a(year ind1) vce(r)
- if e(r2)>`max_r2'{
- local max_r2=e(r2)
- local best_vars="`vars'"
- }
- }
- display "best variable combination:" `best_vars'
- display "Max R2 value:" `max_r2'
```


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