Researchers tested a group of 20-somethings and people in their 60s and 70s in various subjects, focusing on economic questions such as basic financial literacy, knowledge about debt, how much the participants thought about their financial futures. Despite a general loss of mental acuity, the older group did better than the younger test-takers in virtually every category.
How is that?
Researchers explained the results by teasing apart two different kinds of intelligence. "Fluid intelligence" involves short-term memory, problem solving and the ability to manipulate information and process it quickly. "Crystallized intelligence" consists of a "stable repository of knowledge acquired through experiences, culture and education."
As we age, we lose fluid intelligence, but gain crystallized intelligence. “For decisions that rely heavily on processing new information, it is likely that the negative effects of aging will outweigh its positive effects relatively early in middle age,” the study concludes. “On the other hand, if the decision relies on recognizing previously learned patterns in a stable environment, age may be an advantage.”
I read in an article in last week's New Yorker about the University of New Hampshire mathematician Yitang Zhang. The article notes that mathematics is a "young man's game" and quoted an expert who said, "I do not know of an instance of a major mathematical advance initiated by a man past fifty."

Anyway, it turns out for most day-to-day financial decisions it’s better to rely on knowledge, experience and “previously learned patterns” than it is to exhibit an ability to quickly process new information. Here are just some of the areas where older people in the survey outshined their younger counterparts:
Perhaps older people can’t solve an equation quite as fast as their sons and daughters, but they demonstrated a better understanding of finance and debt. They are more likely to avoid carrying credit card balances and are wary of incurring other financial costs such as high bank fees.
Older people show more control over their emotions, and so they are more skeptical about jumping on the latest investment trend or buying a stock on a "hot" tip. Older people are less likely to get sucked into a financial bubble -- whether it was the internet bubble of the early 2000s or the real-estate bubble of the mid-2000s.
Older investors prove better at avoiding irrelevant information. They can tune out the noise from CNBC and other financial media, and focus on significant trends and their own long-term objectives
The older people show a sense of their own limitations. Younger people can be cocky and overconfident. But their older brethren are aware that sometimes forecasts don’t pan out, and so they have the mental fortitude to take a small loss now rather than wait around for a complete catastrophe.
They are more patient, better able to weather the ups and downs of the market, without panicking. Younger people who can process information more quickly make better day traders, but day traders almost always lose money. People who are slowly building up wealth over time are the ones who win out in the end.
The researchers tested out the difference between fluid intelligence and crystallized intelligence in the area of finance and economics. But it seems to me the advantage of crystallized intelligence would carry over into a lot of other areas of life -- such as whether or not to take a new job; how suitable is that boyfriend or girlfriend; maybe you're too young to get married; is that really a good living arrangement.
I always told my kids that if we all just did what our mothers told us to do -- no questions, no arguments -- we'd all live better lives. Of course, I said that with tongue in cheek. But I really meant it. Or, to put it another way, perhaps father really does know best!