求助如果做出来交互项和分组变量均不显著有什么办法啊?
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| Robust
gdp | Coef. Std. Err. t P>|t| [95% Conf. Interval]
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gd | -.4375002 1.272857 -0.34 0.735 -3.092633 2.217632
_Icity_1 | -.5874998 1.202644 -0.49 0.631 -3.09617 1.921171
dr_year_1 | -2.5 .9577317 -2.61 0.017 -4.497793 -.5022064
_cons | 11.15 .8780661 12.70 0.000 9.318386 12.98161
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