Notes on Robinson Crusoe, Chapters 12 through 15:
The Economics Island: Microeconomics, Keynes
and Marx.
Usually
economists use Robinson’s example to illustrate Microeconomics concepts, and
that’s pretty useful, after all Microeconomics tries to understand the human
being mindset without considering social / institutional feedback effects over
the individual.
That’s
probably a very poor definition, but I hope it helps you understand why Robinson
is such a lovely character to us economists (so glad I can finally say that!).
The
Economics Island, though, makes one wonder about other economists, and how well
would their theories fit into this story. Particularly, I wonder, would Marx’s “Commodity
Fetishism” or Keynes’ “Liquidity Preference” be related to the book? Maybe I’m
way out of line here, but I believe both authors explain quite well this
passage:
“
The last thing I found was a secret drawer in the cabin. In that drawer there
was some money (…) I smiled to myself when I say this money. ‘O useless stuff!’
I cried. ‘What are you good for now? You are not worth picking up. This little
old knife is worth much more. I have no manner of use for you. Lie there, where
you are, and go to the bottom’. I was about to leave the cabin when I looked
around again. The bright pieces were so pretty that I could not bear to leave
them.”
Isn’t this passion for money, even in a
situation where it can’t be used, somewhat surprising?
It
makes me think about the intrinsic value of money, or how people valuate money independently
of the goods that it can buy. Keynes explains why people leave bequest to their
children using the intrinsic value of money argument, for instance, and, the
very same concept suits pretty well the passage above.
Perhaps
Marx’s “Commodity Fetishism” shall be evoked. I would definitely do that if I
could.
I suppose this concept is also related to the passage above, but, I’m not sure
that I can prove my point, so, let’s just keep that as a hypothesis for now…