After many hours of debugging deep inside a hessian that sometimes produced
weird results.
In [48]:
(-y**2 * (y - 1)) / (y**2. * (y - 1))
Out[48]:
array([[ -1.00000000e+00],
[ -1.77041643e-03],
[ 5.80863636e-04],
[ -5.37729923e-03],
[ -1.74809893e-03],
[ 2.25499819e-02],
[ 8.65999453e-03]])
y is int32
Josef
https://github.com/statsmodels/statsmodels/issues/3919
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