The results indicate that:(1)the optimal degree of governmental intervention during policy regulation period should be reduced gradually;
研究结果：（1）政策调控周期内最优干预力度应逐渐减小；
The results indicate that:(1)the optimal degree of governmental intervention during policy regulation period should be reduced gradually;
研究结果：（1）政策调控周期内最优干预力度应逐渐减小；
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