<s>
RATS	B-Algorithm
,	O
an	O
abbreviation	O
of	O
Regression	B-Algorithm
Analysis	I-Algorithm
of	I-Algorithm
Time	I-Algorithm
Series	I-Algorithm
,	O
is	O
a	O
statistical	B-Algorithm
package	I-Algorithm
for	O
time	O
series	O
analysis	O
and	O
econometrics	O
.	O
</s>
<s>
RATS	B-Algorithm
is	O
developed	O
and	O
sold	O
by	O
Estima	O
,	O
Inc.	O
,	O
located	O
in	O
Evanston	O
,	O
IL	O
.	O
</s>
<s>
The	O
forerunner	O
of	O
RATS	B-Algorithm
was	O
a	O
FORTRAN	B-Application
program	O
called	O
SPECTRE	O
,	O
written	O
by	O
economist	O
Christopher	O
A	O
.	O
Sims	O
.	O
</s>
<s>
The	O
program	O
was	O
then	O
expanded	O
by	O
Tom	O
Doan	O
,	O
then	O
of	O
the	O
Federal	O
Reserve	O
Bank	O
of	O
Minneapolis	O
,	O
who	O
added	O
ARIMA	O
and	O
VAR	O
capabilities	O
and	O
went	O
on	O
to	O
found	O
the	O
consulting	O
firm	O
that	O
owns	O
and	O
distributes	O
RATS	B-Algorithm
software	O
.	O
</s>
<s>
In	O
its	O
early	O
incarnations	O
,	O
RATS	B-Algorithm
was	O
designed	O
primarily	O
for	O
time	O
series	O
analysis	O
,	O
but	O
as	O
it	O
evolved	O
,	O
it	O
acquired	O
other	O
capabilities	O
.	O
</s>
<s>
With	O
the	O
advent	O
of	O
personal	O
computers	O
in	O
1984	O
,	O
RATS	B-Algorithm
went	O
from	O
being	O
a	O
specialty	O
mainframe	B-Architecture
program	O
to	O
an	O
econometrics	O
package	O
sold	O
to	O
a	O
much	O
broader	O
market	O
.	O
</s>
<s>
RATS	B-Algorithm
is	O
a	O
powerful	O
program	O
,	O
which	O
can	O
perform	O
a	O
range	O
of	O
econometric	O
and	O
statistical	O
operations	O
.	O
</s>
<s>
The	O
following	O
is	O
a	O
list	O
of	O
the	O
major	O
procedures	O
in	O
econometrics	O
and	O
time	O
series	O
analysis	O
that	O
can	O
be	O
implemented	O
in	O
RATS	B-Algorithm
.	O
</s>
<s>
In	O
addition	O
,	O
RATS	B-Algorithm
can	O
handle	O
cross-sectional	O
and	O
panel	O
data	O
:	O
</s>
<s>
Linear	B-General_Concept
regression	I-General_Concept
,	O
including	O
stepwise	O
.	O
</s>
<s>
Non-linear	B-Algorithm
least	I-Algorithm
squares	I-Algorithm
.	O
</s>
<s>
Neural	B-Architecture
networks	I-Architecture
.	O
</s>
<s>
RATS	B-Algorithm
can	O
read	O
data	O
from	O
a	O
variety	O
of	O
file	O
formats	O
and	O
database	O
sources	O
,	O
including	O
Excel	O
files	O
,	O
text	O
files	O
,	O
Stata	O
files	O
,	O
and	O
most	O
databases	O
that	O
support	O
SQL	O
and	O
ODBC	O
.	O
</s>
<s>
RATS	B-Algorithm
has	O
extensive	O
graphics	O
capabilities	O
.	O
</s>
<s>
RATS	B-Algorithm
can	O
be	O
run	O
interactively	O
,	O
or	O
in	O
batch	O
mode	O
.	O
</s>
<s>
One	O
advantage	O
of	O
RATS	B-Algorithm
,	O
as	O
opposed	O
to	O
automated	O
forecasting	O
software	O
,	O
is	O
that	O
it	O
is	O
an	O
actual	O
programming	O
language	O
,	O
which	O
enables	O
the	O
user	O
to	O
design	O
custom	O
models	O
,	O
and	O
change	O
specifications	O
.	O
</s>
