
Feel like mugging someone?
Did you know that the sale of ice cream is strongly correlated to the number of muggings in a given locale? Could it be that consuming ice cream leads us to attack our fellow citizens? Or perhaps miscreants in our midst mug strangers to get the money to buy ice cream? We have two variables, X and Y. Which one causes which? In this case, there’s a third variable, Z, that causes both X and Y. It’s the temperature. As the temperature rises, we buy more ice cream. At the same time, more people are wandering about out of doors, even after dark, making them convenient targets for muggers.
What causes what? It’s the most basic question in science. It’s also an important question for business planning. Lowering our prices will cause sales to rise, right? Maybe. Similarly, government policies are typically based on notions of cause and effect. Lowering taxes will cause the economy to boom, right? Well… it’s complicated. Let’s look at some examples where cause and effect are murky at best.
Home owners commit far fewer crimes proportionally than people who don’t own homes. Apparently, owning a home makes you a better citizen. Doesn’t it follow that the government should promote home ownership? Doing so should result in a safer, saner society, no? Well… maybe not. Again, we have two variables, X and Y. Which one causes which? Could it be that people who don’t commit crimes are in a better position to buy homes? That not committing crimes is the cause and home ownership is the result? The data are completely tangled up so it’s hard to prove conclusively one way or the other. But it seems at least possible that good citizenship leads to home ownership rather than vice versa. Or maybe, like ice cream and muggings, there’s a hidden variable, Z, that causes both.
The crime rate in the United States began to fall dramatically in the early 1990s. I’ve heard four different reasons for this. Which one do you think is the real cause?
Which of the four variables actually caused the declining crime rate in America? A lot is riding on the answer. Unfortunately, the data are so tangled up that it’s difficult to tell what causes what. But here are some rules for thinking about correlation and causation:
Actually, the only way to prove cause and effect beyond a shadow of a doubt, is the experimental method. Which leads us to our question for tomorrow: does smoking cause cancer in humans?

I’m a traditionalist. And an iconoclast.
In his classic research on creativity, Mihaly Csikszentmihalyi wrote that creative personalities often display ten contrasting characteristics. In previous articles, we’ve looked at the first six. (Click here and here). Today let’s look at the final four.
In all cultures, men are brought up to be “masculine” and to disregard and repress those aspects of their temperament that the culture regards as “feminine,” whereas women are expected to do the opposite. Creative individuals to a certain extent escape this rigid gender role stereotyping. Csikszentmihalyi refers to this as androgyny — not just in the sexual sense but in the broader, cultural sense: “a person’s ability to be at the same time aggressive and nurturant, sensitive and rigid, dominant and submissive…” In his sample of creative personalities, Csikszentmihalyi found that the men were more sensitive and the women more assertive than their cultural norms would suggest.
Generally, creative people are thought to be rebellious and independent. Yet it is impossible to be creative without having first internalized a domain of culture. To master the vast knowledge of a given discipline, novices need to work very hard. They wouldn’t work so hard unless they believed deep knowledge of the field were important. Thus, in some senses, they are traditionalists as much as they are iconoclasts.
Most creative persons are very passionate about their work, yet they can be extremely objective about it as well. To perform difficult tasks that might take years to complete, one needs to be passionate. Yet to place one’s work against an existing domain’s framework — and to make it credible — one needs to be clear-eyed and objective.
Finally, the openness and sensitivity of creative individuals often exposes them to suffering and pain yet also a great deal of enjoyment. Leading a discipline into a new way of thinking is a lonely job. Being sensitive (as noted above) only complicates the issue. Csikszentmihalyi asks an important question: does suffering lead to creativity or does creativity lead to suffering? Normal people may see divergent thinking and obsessive interest in obscure topics as weird or even deviant. As a result, “the creative person may feel isolated and misunderstood …. Yet when the person is working in the area of his or her expertise, worries and cares fall away, replaced by a sense of bliss. Perhaps the most important quality, the one that is most consistently present in all creative individuals, is the ability to enjoy the process of creation for its own sake.”
So we have ten different contrasting personality types that commonly occur in creative people. In each case, the creative personality appears at two different points on the spectrum. They are both traditionalists and iconoclasts. Smart and naive. Energetic and quiet. Introverts and extroverts. Imaginative and realists. As Csikszentmihalyi points out, “…without the second pole, new ideas will not be recognized. And without the first, they will not be developed to the point of acceptance.”
Click here for Csikszentmihalyi’s book. By the way, his surname is pronounced Six-Cent-Mihaly.

I’m looking for a connection.
Let’s say that the city of Groverton has 100,000 residents and produces X number of innovations per year. Down the road, the city of Pecaville has 1,000,000 residents. Since Pecaville has ten times more residents than Groverton, it should produce 10X innovations per year, correct?
Actually, no. Other things being equal, Pecaville should produce far more than 10X innovations. In predicting innovation capacity, it’s not the number of people (or nodes) that counts, it’s the number of connections. The million residents of Pecaville have more than ten times the connection opportunities of the residents of sleepy little Groverton. Therefore, they should produce much more than ten times the number of innovations.
In Where Good Ideas Come From, Steven Johnson makes the point that connections are the fundamental unit of innovation. The more connections you can make, the more likely you are to create good ideas. Scale doesn’t matter — more connections are better at a very small scale or a very large scale. This is where cities come in. In terms of innovation, larger cities have multiple advantage over smaller cities, including:
Does this work in real life? Johnson provides some very interesting anecdotes. More recently, last Friday’s New York Times had an article (click here) on manufacturing and innovation. The article argues that more innovation happens when designers are close to the manufacturing floor. Why? Because of information spillover. Researchers claim that offshore manufacturing reduces our ability to innovate precisely because it reduces information spillover. Connectivity seems to work on the manufacturing floor as much as it does in big cities. Scale doesn’t matter. Bottom line: if you want to be more innovative, get connected.

Pardon me while I unitask.
Interesting items I’ve discovered in the past week or so: