“I would say recent experiments lead us down a road to the idea that we don’t all see the same colors,” Neitz said.

Another color vision scientist, Joseph Carroll of the Medical College of Wisconsin, took it one step further: “I think we can say for certain that people don’t see the same colors,” he told Life’s Little Mysteries.

One person’s red might be another person’s blue and vice versa, the scientists said. You might really see blood as the color someone else calls blue, and the sky as someone else’s red. But our individual perceptions don’t affect the way the color of blood, or that of the sky, make us feel.

Hard for me to judge, but you can read more here, if that click through doesn’t work for you use http://www.lifeslittlemysteries.com/117-if-blood-is-red-why-are-veins-blue.html, hat tip goes to The Browser.

1. Ben Casnocha reads and highlights An Economist Gets Lunch.

2. Memoir of getting a Ph.D in computer science.

3. The leap smear.

4. Why do condominiums even exist?

5. Your e-Book is reading you.

From Timothy Taylor, spotted by Arnold Kling:

Through much of the 1990s, the ratio of owner’s equity to GDP fell, but in the early 1990s, that was partly a result of depressed regional real estate markets in certain states in the aftermath of the collapse of many savings and loan institutions in the late 1980s and early 1990s (which made the numerator of the ratio decline), and also a result of fast economic growth from the mid-1990s on (which made the denominator of the ratio rise). Again, the bottom line is that the spike in the total value of housing that ended around 2006 is well outside the post-World War II historical experience. And the drop since 2006 takes this ratio from by far its highest value since 1950 to by far its lowest value since 1950.

We are not as wealthy as we had thought.

1. Arnold Kling on three ways to write for an audience.

2. Gavyn Davies on the summit deal.

3. Miles Kimball — “The Show So Far”

4. The origins of American health libertarianism.

5. Menus of various American Presidents.

Premarital investigations cost $200 to $400 and take seven to 10 days. Detectives follow the subject for 12 to 18 hours daily and chat up co-workers, domestic help and tradesmen under various pretexts. “Beware — your neighbor knows everything,” says Sanjay Singh, chief executive of New Delhi’s Indian Detective Agency. “Sometimes more than you know yourself.”

Particularly useful are fake marketing surveys. Enticed into participating with the promise of a free gift, sometimes something as modest as a bottle of shampoo, the subject or a neighbor may reveal a secret relationship or details of a would-be bride or groom’s late-night entertainment activities and smoking or drinking habits.

“People love freebies,” says Krishna Kumar, an Anapol Institute graduate. “Most fall for it hook, line and sinker.”

She worked at a computer company for four years before deciding detective work would be a lot more challenging. Women have a big advantage as sleuths because they’re non-threatening, can mingle better and are more intuitive, she says.

“I like doing premarital investigations best,” she says. “You’re watching someone go in a new direction, and your work could make or break their future.”

…Most premarital investigations are ordered by parents, although sometimes spouses-to-be want a little snooping done, including women keen to size up their prospective mothers-in-law in a society where it is common for couples to live with the husband’s extended family.

The story is here, and for the pointer I thank Vishal Ganesan.  Oh, and the results?:

According to detectives, investigations turn up significant problems in about 60% of cases. In about 10%, the discoveries are explosive enough — such as previously undisclosed marriages or serious hereditary diseases — to cause cancellation of the wedding.

For the caste-conscious, a hidden Dalit relative, or so-called untouchable, is also problematic. “Caste and dowries remain huge issues today, and people like to exaggerate,” says Sachit Kumar, director of Globe Detective Agency.

A factor driving premarital investigations is the growing number of cases in which foreigners of Indian descent marry and then disappear, often taking huge dowries with them. It happens to 30,000 brides every year in northern Punjab state alone, according to India’s National Commission for Women.

1. Five boom towns in Africa, what do you conclude?

2. Sony Kapoor on the euro summit, there are further points here, and the big winners are explained here.

3. Michael Kremer talk on RCT development economics.

4. David Brooks on John Roberts.

Not your usual cup of tea, here is one of them:

The Simulation Argument. This is legion in popular culture from “The Matrix” and “Inception” and other sci-fi, so we’ll just refer you to Nick Bostrom’s formulation of it. In theory we could tell the difference if something happened in the manner of The Truman Show where a light labeled “Sirius” falls from the sky. But are there any such events?

We offer one complexity-related observation. Although it is routine to say that classes like and have universal simulation, this isn’t strictly true. The universal function for doesn’t belong to —if it did, then would be in some fixed polynomial time bound, which it isn’t. Although proving this is technically murkier for “random” or “promise” classes like , the essential idea holds for any reasonable complexity class. Thus a universal simulation involves dropping down to a lower grade than the resources on which you draw. If our universe is convincingly universal, perhaps this is a well-motivated reason to reject the argument.

Perhaps the conspiracy is that so many people are intent on getting us to believe the simulation hypothesis.  Here is another one:

Factoring Really Is Easy. This is similar to the last, but now they can factor in polynomial time on a laptop, rather than need a quantum computer. Ken and I think this one has a much higher prior, almost on the order of “Breaking Engima Really Is Easy” in 1939.

If I understand properly, that is from a collaborative post from Pip and Ken Regan.

1. Why euro debt buyback probably won’t work.

2. Credit guarantees in China.

3. How do anteaters decide how and what to eat?