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发信人: kuangshui ((▄︻┻┳═一)), 信区: Postgraduate
标题: How to Build an Economic Model in Spare Time 6
发信站: 荔园晨风BBS站 (Sat Mar 25 23:08:30 2006), 站内

--6. Making mistakes

This process---simplify to get the result, complexify to see how general it
is---is a good way to understand your model. Most of the time that I spend
modeling is involved in this back-and-forth process. Along the way, I make
a lot of mistakes. As Piet Hein puts it:

The road to wisdom? We'll it's plain and simple to express:
Err and err
and err again
but less
and less
and less.

This back-and-forth iteration in building a model is like sculpting: you are
chipping away a little bit here, and a little bit there, hoping to find what's
really inside that stubborn block of marble. I choose the analogy with
sculpting purposely: like sculpture most of the work in building a model

This is the most fun part of modeling, and it can be very exciting when the
form of the idea really begins to take shape. I normally walk around in a bit
of a daze at this stage; and I try not to get too far away from a yellow pad.

Eventually, if you're lucky, the inner workings of your model will reveal
itself: you'll see the simple core of what's going on and you'll also
understand how general the phenomenon really is.

又一村102

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