[Gretl-devel] Mean Absolute Percentage Error: possible mistake
Dear Allin and Jack,
I think there is an error in the definition of the Mean Absolute Percentage
Error (chapter 29, section 29.4). I think we should use the modulus of the
entire division:
abs(e_t/y_t)
Now we have:
abs(e_t)/y_t
Um abraço,
Henrique Andrade
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