May I know how to apply Newton-Raphson Method in Excel to get the value of αi and βj???
Log L(α,β) = ∑∑(-αiβj + Xij log(αiβj) - log(Xij!))
∂log L / ∂αi = ∑(-βj + Xij / αi)
αi = ∑Xij / ∑βj
∑αi = ∑βj
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