SERVING THE QUANTITATIVE FINANCE COMMUNITY

 
User avatar
CrashedMint
Topic Author
Posts: 2591
Joined: January 25th, 2008, 9:12 pm

Stupid question of the day

March 1st, 2011, 2:14 pm

Is there a fancy word for, better yet papers on "overkill modeling"? I need a term to get the google scholar search going.

Am reading some sociological papers and they use very little unrepresentative data, then from this data they build the weirdest and most complex structural equations. It all sure looks real sciencey, but I think it's crap à la: Likelihood that consumer A buys from brand B = consumer age * 0.377 y + education / 0.14x + (number of pans in the kitchen)^2 - 0.000012 * 1/sqrt(ln(e)) * sqrt(price).

I mean, seriously people?:
Last edited by CrashedMint on February 28th, 2011, 11:00 pm
 
User avatar
Cuchulainn
Posts: 56683
Joined: July 16th, 2004, 7:38 am
Location: Amsterdam
Contact:

Stupid question of the day

March 1st, 2011, 2:19 pm

FCM See the books of Bart Kosko.


And at skule, kids do FCM minus the edge weights. Called concept maps. I use them (sometimes) when analysing large s/w systems.

http://www.amazon.com/Learning-How-Learn-Joseph-Novak/dp/0521319269

FCM are used to brainstorm on causality, limit cycle analysis. For people in Think Tanks?
Last edited by Cuchulainn on February 28th, 2011, 11:00 pm
 
User avatar
Hansi
Posts: 3299
Joined: January 25th, 2010, 11:47 am

Stupid question of the day

March 1st, 2011, 2:25 pm

Data mining and over fitting in-sample data without much intuitive sense? The whole financial industry has fallen into this trap at one time or another. Well maybe not to this ridiculous an extend.
 
User avatar
Traden4Alpha
Posts: 23951
Joined: September 20th, 2002, 8:30 pm

Stupid question of the day

March 1st, 2011, 5:08 pm

As long as the data is deep enough and it passes well-formed out-of-sample tests, I see nothing wrong with the models you cited. Models of people's behaviour often have complex structures and non-linear terms because people are complex and non-linear.

The difference between sciencey and science can't be discerned from the model, only from the underlying methods that created the model.

If only people were more like protons. But they're not.
 
User avatar
tagoma
Posts: 18233
Joined: February 21st, 2010, 12:58 pm

Stupid question of the day

March 1st, 2011, 8:00 pm

i remember semantic space graphs as i studied science of information, with advanced links between entries.
and, i remember the theory of the click and other complex structured representation of individual and group behaviours as i studied institutional economics.
it seemed to me as 'science'.
Last edited by tagoma on February 28th, 2011, 11:00 pm
 
User avatar
ppauper
Posts: 68468
Joined: November 15th, 2001, 1:29 pm

Stupid question of the day

March 2nd, 2011, 9:20 am

it's now wednesday, what about today's stupid question ?
 
User avatar
Fermion
Posts: 4486
Joined: November 14th, 2002, 8:50 pm

Stupid question of the day

March 2nd, 2011, 4:43 pm

Quote

Originally posted by: ppauper
it's now wednesday, what about today's stupid question ?


I guess that was it.
 
User avatar
Traden4Alpha
Posts: 23951
Joined: September 20th, 2002, 8:30 pm

Stupid question of the day

March 2nd, 2011, 6:54 pm

Quote

Originally posted by: Fermion
Quote

Originally posted by: ppauper
it's now wednesday, what about today's stupid question ?
I guess that was it.
Good one, Fermion!

 
User avatar
rmax
Posts: 5964
Joined: December 8th, 2005, 9:31 am

Stupid question of the day

March 3rd, 2011, 9:09 am

So who is going to ask today's stupid question?






D'oh.

 
User avatar
Cuchulainn
Posts: 56683
Joined: July 16th, 2004, 7:38 am
Location: Amsterdam
Contact:

Stupid question of the day

March 3rd, 2011, 10:10 am

 
User avatar
daveangel
Posts: 17028
Joined: October 20th, 2003, 4:05 pm

Stupid question of the day

March 3rd, 2011, 10:16 am

Quote

So who is going to ask today's stupid question?


Why can't we all just try and get along ?
Last edited by daveangel on March 2nd, 2011, 11:00 pm
knowledge comes, wisdom lingers
 
User avatar
tagoma
Posts: 18233
Joined: February 21st, 2010, 12:58 pm

Stupid question of the day

June 11th, 2014, 6:14 pm

When will they put entire movies in .GIF files?
 
User avatar
tagoma
Posts: 18233
Joined: February 21st, 2010, 12:58 pm

Stupid question of the day

June 14th, 2014, 10:13 am

When did greed (love of good food) first appear?
 
User avatar
katastrofa
Posts: 6137
Joined: August 16th, 2007, 5:36 am
Location: Alpha Centauri

Stupid question of the day

June 14th, 2014, 11:42 am

"Do you like bees?"
I've been asked it twice in one week by some random people in the street. Some bees support campaign? I guess it doesn't work too well when the campaigners look more like corpo-rats.
a

or is this some code meaning that I look fat? bees-obese?
Last edited by katastrofa on June 13th, 2014, 10:00 pm
 
User avatar
Traden4Alpha
Posts: 23951
Joined: September 20th, 2002, 8:30 pm

Stupid question of the day

June 14th, 2014, 11:52 am

Quote

Originally posted by: katastrofa
"Do you like bees?"
I've been asked it twice in one week by some random people in the street. Some bees support campaign? I guess it doesn't work too well when the campaigners look more like corpo-rats.
a

or is this some code meaning that I look fat? bees-obese?
Maybe it's because A's get all the attention?

ABOUT WILMOTT

PW by JB

Wilmott.com has been "Serving the Quantitative Finance Community" since 2001. Continued...


JOBS BOARD

JOBS BOARD

Looking for a quant job, risk, algo trading,...? Browse jobs here...