A bigram model computes the probability p(D;θ) as: p(D;θ)=p(w0)∏w1,w2∈Dp(w2|w1) where w0 is the first word, and (w1,w2) is a pair of consecutive words in the document. This is also a multinomial model. Assume the vocab size is N. How many parameters are there?
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