else.
Barring a tax, the other means of internalizing the externality is making the activity illegal—
think of the fine from breaking the law as another form of tax. A good law curtails those
activities which have negative externalities and thus makes the world a better place. Exam-
ples: don’t litter because it’s easy for you but makes other people’s lives worse; don’t drive
drunk because it’s easy for you but makes other people’s lives worse; you can’t buy a car
with certain types of dirty engine because it’s cheap for you but makes other people’s lives
worse, et cetera.
The problem comes in when working out how much curtailing to do. When people say that
their lives are worse off because of somebody’s actions, they have absolutely no incentive
to tone down the whining. I think you’ve all been there—especially if you’ve ever had a
roommate. Back when I was a bike messenger, my roommate borrowed my bike for a stroll
along the lakeshore, and got a flat tire. He didn’t quite patch it right, and it went flat a few
more times over the course of the day. I lost work as a result, and by the time I got home,
I had prepared an extensive bitchy commentary for him about how his actions had ruined
my life. Yet he started yelling first, about how I’d left a nubbin of pasta at the bottom of a
pot, and now it was really stuck, and how I had thus totally ruined his life. He made it very
clear that losing business, patching an expanding hole, and walking part of the way home
was nothing compared to what he’d suffered at the hands of that blob of pasta.
It wasn’t the best roommate situation, but it mirrors legislative lobbying and debate pretty
well. Imagine the whining when the problem is bigger than pasta stuck to the pot, like
an issue of education and property taxes, or pollution. It basically becomes guesswork as
to what damage one person suffers from somebody else’s actions. The conservatives of the
world often latch on to this, and conclude that everybody is just lying all the time, and there
really are no externalities, or if there are, they aren’t nearly as bad as everybody makes them
out to be, so we should ignore them. ‘Buck up and stop whining,’ the conservative would
politely explain.
Anyway, behind a huge number of government activity and restrictions upon behavior, there
is an externality involved. It’s a fun exercise to ask yourself, for any law that comes to mind,
what harmful externalities that law is preventing; you’ll find something for almost all of ‘em.
For example, laws curtailing pollution exist because pollution damages property which is
either in the public trust or is intimately the property of a non-polluter (like the air in my
lungs). When people don’t get an education, studies show, they’re more likely to wind up
poor, annoying, and a criminal, which are all things that affect the other people that interact
with the uneducated. On the positive side: when you take public transportation instead of
driving, other people have clearer roads and lungs. When people tell you that government
should get out of these fields and the market will provide the optimal levels of pollution,
education, and public transport, tell them that they’re entirely wrong, because the market
can not accommodate the effects of the externalities.
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