The idea is to assume "sample-with-replacement" and that one can identify a s from K 1 without knowledge of K 2 .
we assume a (1) is a product of two binomials: Setting the first derivative of the logarithm of (25) to be zero, we obtain which is quadratic in a and has a convenient closed-form solution: The second root can be ignored because it is always out of range: The evaluation in Section 4 showed thatâ MLE,a is close toâ MLE .