这个怎么看?
year = 17
firm crs te rel to tech in yr vrs
no. ************************ te
t-1 t t+1
1 0.386 0.411 0.459 0.471
2 0.934 1.000 1.092 1.000
3 0.948 1.000 1.117 1.000
4 0.822 0.911 0.995 0.969
5 0.685 0.734 0.801 0.981
6 0.598 0.649 0.722 0.686
7 0.574 0.606 0.657 1.000
8 0.298 0.314 0.341 0.374
mean 0.656 0.703 0.773 0.810


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