弹性和指数


1

给出以下3个方程式: $$ Y ^ * _ t = 100 + 3t \\ Y_t = Y_t ^ *(1+(0.2(\ sin t))\\ B_t = B_t ^ *(1+(0.4(\ sin t))\\ $$ 并将B *作为以下内容,但未知: $$ B_t ^ * = \ alpha Y_t ^ * \\ $$ 我认为估算B *的最佳方法如下: $$ \ hat {B} _t ^ * = B_t(Y_t ^ * / Y_t)^ {0.4 / 0.2} \\ $$ 但我无法弄清楚它是如何运作的。任何人都可以一步一步提供吗?为什么它不是一个完美的估计?


3知道

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估计未知

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