<s>
In	O
econometrics	O
,	O
the	O
information	B-General_Concept
matrix	I-General_Concept
test	I-General_Concept
is	O
used	O
to	O
determine	O
whether	O
a	O
regression	O
model	O
is	O
misspecified	O
.	O
</s>
