Posted by John on January 01st 2006 to
Framework
The term diversity has been hijacked to mean many different
things, and it is often problematic to think about what it really
means. But it is the right word for the concept I want to cover, and
there is no equal subsitute.
I think that it is a fundamental law of the universe that diversity is
good. The benefits of diversity appear in so many different contexts
that its goodness is something ubiquitous like logic, or gravity, or
death, or taxes.
In 2006 American culture, diversity is often taken to mean that a
group (be it employees in a company, or students in a university,
or models in an advertisement) should be composed of a certain
mixture of ethnicities, genders, sexual orientations, religions, and
so forth. So the idea of diversity gets boiled down to simplistic policies
such as “1% of all admissions to the college should be Pacific Islanders”.
Of course, these rules are very context dependent, and a rule such
as this one might increase diversity at a college in Maine, and be
discriminatory at a college in Hawaii. When the idea of diversity
becomes synonymous with affirmative action, the goal is usually good,
but there is often a giant supply of paradox and irony.
If we take a broader view, diversity is an essential concept in finance,
sports, engineering, politics, genetics, networking, and much more.
An investment portfolio that maximizes return while minimizing risk
is not made up of one investment. On the contrary, diversity is carefully
considered and measured (and called a related term, diversification).
A successful baseball team can be made up of great pitchers who are not
great hitters, and great hitters who would be mediocre catchers, and
coaches who might not qualify to be even minor league players. In other
words, each player is extremely strong at a small number of things,
but they do not each have the same set of skills.
The most successful project teams are usually made up of people with
varying backgrounds. It usually makes no sense to hire only people
with exactly the same skills … for most projects of any complexity,
this is completely redundant. Hiring practices and laws often focus
on superficial dimensions, such as gender, race, and age, rather than
the other dimensions, such as skills and knowledge, but both play
an important role in having a strong project team. I remember being
part of an urgent project in 1999 where a system had to be deployed
to replace an aging one with a Y2K problem. The first deployment
absolutely had to happen one week in April, which happened to contain
Easter and Passover. Since the project team was extremely diverse in
religious beliefs, there were people who celebrated Easter, Passover,
and other holidays. Because of this diversity, there was someone
available every day of the week to push the deployment forward without
needing to ask someone to work a holiday that they celebrated.
Communications networks are another great example of the power
of diversity. The Internet is the evolution of the ARPANET, which was
a packet switched network designed to survive all sorts of global
mayhem. (That same diversity and redundancy is what makes
censorship almost impossible on the Internet, much to the chagrin of
some governments.)
Diversity is absolutely essential to the Trust Manifesto. When
transactions are rare and there is a huge amount at stake, it becomes
more difficult to extend trust, because the consequences can be bad.
When transactions are smaller and more frequent, it is easier to
estimate the probabilities of things going well or poorly, and the
probability of a completely negative outcome is slim. Imagine you
are drowning 1 mile offshore, and it is foggy. You have your
choice of being sought after by 100 people on a large Coast Guard
cutter, or 100 people on 100 jet skits. Both involve the same manpower
and equipment cost, but there is a much greater chance that at least
one jet ski will wander close to you before you drown.
Most personal and business situations involve huge numbers of
transactions with relatively smaller stakes. The diversification that
comes from that is where the opportunity lies. Perhaps an example
from investing will illustrate this best. Imagine three scenarios for
investing $100,000. The first scenario is putting all of the money
into US Treasury Bills. These are considered the least risky of all
investments, and the yield is usually fairly low … let’s say 4% for now.
Then, one could put all $100,000 into a stock that has appreciated
30% a year for the last four years. If all goes well, you could make 30%
this year, but of course it is a risky bet. Unless you are completely
risk averse, (or the opposite … addicted to gambling), neither of these
alternatives is appealing. Instead, a reasonable solution might be to
buy a basket of stocks that averaged 12% returns last year. If you put
$10,000 in each of 10 stocks, and a few have a bad year, you are still
likely to make more than the Treasury Bill yield. In the meantime, your
risk is far lower than if you had all of the money in the one stock that
might return 30%.
In business school, one learns about how to reduce risk in a portfolio
through diversification. One surprising thing is how small a number
of stocks are needed in a basket in order to reduce most risk. I
remember that having just 8 stocks is almost as good as having 100
stocks, in terms of risk reduction.
I hope that you can see the connection between this type of diversity
and some scenarios we have covered in previous postings. Just like
one should not be unnessarily worried about one investment doing
poorly in a diversified portfolio, one should not be overly worried about
one customer or supplier taking advantage of you. The idea is to
structure things to take managed risks. People do not become wealthy
by only investing in Treasury Bills, and people do not become wealthy
by perpetually hanging out in casinos (unless they own them). It is in
that area between these two extremes, where people take small risks
on large numbers of transactions, and learn to be comfortable doing
that, where profit is made and personal happiness is found. A crucial
part of all this is that fundamental property of the universe: diversity
is good. This pops up in almost every field if you look hard enough.
Others have more efficiently made the same point as me by using these
eight words:
Don’t put all your eggs in one basket.