▁M . ▁New man ▁Category : Fil ms ▁set ▁on ▁fict ional ▁plan ets ▁Category : Univers al ▁Pictures ▁films ▁Category : Fil ms ▁featured ▁on ▁Myst ery ▁Science ▁Theater ▁ 3 0 0 0 <0x0A> </s> ▁For ▁a ▁more ▁technical ▁treatment , ▁see ▁Ident ifi ability . ▁ ▁In ▁statistics ▁and ▁econ omet rics , ▁the ▁parameter ▁identification ▁problem ▁is ▁the ▁in ability ▁in ▁principle ▁to ▁identify ▁a ▁best ▁estimate ▁of ▁the ▁value ( s ) ▁of ▁one ▁or ▁more ▁parameters ▁in ▁a ▁regression . ▁This ▁problem ▁can ▁occur ▁in ▁the ▁estimation ▁of ▁multiple - equation ▁econ ometric ▁models ▁where ▁the ▁equations ▁have ▁variables ▁in ▁common . ▁ ▁More ▁generally , ▁the ▁term ▁can ▁be ▁used ▁to ▁refer ▁to ▁any ▁situation ▁where ▁a ▁statistical ▁model ▁will ▁invari ably ▁have ▁more ▁than ▁one ▁set ▁of ▁parameters ▁that ▁generate ▁the ▁same ▁distribution ▁of ▁observations , ▁meaning ▁that ▁multiple ▁paramet riz ations ▁are ▁observation ally ▁equivalent . ▁ ▁Standard ▁example , ▁with ▁two ▁equations ▁Consider ▁a ▁linear ▁model ▁for ▁the ▁supply ▁and ▁demand ▁of ▁some ▁specific ▁good . ▁The ▁quantity ▁demanded ▁var ies ▁neg atively ▁with ▁the ▁price : ▁a ▁higher ▁price ▁decre ases ▁the ▁quantity ▁demanded . ▁The ▁quantity ▁supplied ▁var ies ▁directly ▁with ▁the ▁price : ▁a ▁higher ▁price ▁increases ▁the ▁quantity ▁supplied . ▁ ▁Assume ▁that , ▁say ▁for ▁several ▁years , ▁we ▁have ▁data ▁on ▁both ▁the ▁price ▁and ▁the ▁trad ed ▁quantity ▁of ▁this ▁good . ▁Unfortunately ▁this ▁is ▁not ▁enough ▁to ▁identify ▁the ▁two ▁equations ▁( dem and ▁and