Question

Could you help me to solve this problem?​

Answer 1

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$\huge\boxed{\fcolorbox{cyan}{orange}{Hello}}$

$\huge\underline\mathfrak\red{Answer!!!!!}$

refer to the attachment

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Answer 2

Answer:

Step-by-step explanation:

Yes, you may use a dummy variable around the date of change. If you are familiar with Markov switching models then that would be applicable as well without dummy variable. In that case the model may show the importance of that changeover date unless there were other aspects as well.