Regressione lineare semplice: inferenza - Economia
Regressione lineare semplice: inferenza - Economia
Regressione lineare semplice: inferenza - Economia
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Teorema di Gauss-Markov<br />
Il teorema di Gauss-Markov-Prova<br />
Pertanto,<br />
segue che<br />
σ 2 u<br />
<br />
i<br />
a 2 i = σ 2 u<br />
<br />
i<br />
â 2 i + σ 2 u<br />
<br />
i<br />
d 2 i<br />
= Var[ ˆ β1|X1, . . . , Xn] + σ 2 u<br />
n<br />
<br />
Var[ ˜ β1|X1, . . . , Xn] = σ 2 u a<br />
i=1<br />
2 i = Var[ ˆ β1|X1, . . . , Xn] + σ 2 u<br />
Var[ ˜ β1|X1, . . . , Xn] − Var[ ˆ β1|X1, . . . , Xn] = σ 2 u<br />
i<br />
d 2 i<br />
<br />
<br />
Rossi <strong>Regressione</strong> <strong>lineare</strong> <strong>semplice</strong> Econometria - 2013 43 / 60<br />
i<br />
d 2 i<br />
i<br />
d 2 i