Tag Archives: Paper

New study reveals how school choice benefits the poorest students

Article in the Wall Street Journal. (H/T Jay P. Greene)

Excerpt:

Opponents of school choice are running out of excuses as evidence continues to roll in about the positive impact of charter schools.

Stanford economist Caroline Hoxby recently found that poor urban children who attend a charter school from kindergarten through 8th grade can close the learning gap with affluent suburban kids by 86% in reading and 66% in math. And now Marcus Winters, who follows education for the Manhattan Institute, has released a paper showing that even students who don’t attend a charter school benefit academically when their public school is exposed to charter competition.

Mr. Winters focuses on New York City public school students in grades 3 through 8. “For every one percent of a public school’s students who leave for a charter,” concludes Mr. Winters, “reading proficiency among those who remain increases by about 0.02 standard deviations, a small but not insignificant number, in view of the widely held suspicion that the impact on local public schools . . . would be negative.” It tuns out that traditional public schools respond to competition in a way that benefits their students.

[…]One of the most encouraging findings by Mr. Winters is how charter competition reduces the black-white achievement gap. He found that the worst-performing public school students, who tend to be low-income minorities, have the most to gain from the nearby presence of a charter school. Overall, charter competition improved reading performance but did not affect math skills. By contrast, low-performing students had gains in both areas, and their reading improvement was above average relative to the higher-performing students.

Conservatives love choice and competition, especially in education. We oppose equalizing outcomes regardless of individual liberty and responsibility. Liberals want government to run everything to make sure that everyone gets the same crap level of service. This is what the lazy teacher unions prefer. But conservatives want teachers to be responsive to their customers – the children.

Scientists discover how fathers improve brain development of children

Story from the Wall Street Journal. (H/T Andrew)

Excerpt:

Dr. Braun’s group found that at 21 days, the fatherless animals had less dense dendritic spines compared to animals raised by both parents, though they “caught up” by day 90. However, the length of some types of dendrites was significantly shorter in some parts of the brain, even in adulthood, in fatherless animals.

“It just shows that parents are leaving footprints on the brain of their kids,” says Dr. Braun, 54 years old.

The neuronal differences were observed in a part of the brain called the amygdala, which is related to emotional responses and fear, and the orbitofrontal cortex, or OFC, the brain’s decision-making center.

[…]The balance between these two brain parts is critical to normal emotional and cognitive functioning, according to Dr. Braun. If the OFC isn’t active, the amygdala “goes crazy, like a horse without a rider,” she says. In the case of the fatherless pups, there were fewer dendritic spines in the OFC, while the dendrite trees in the amygdala grew more and longer branches.

A preliminary analysis of the degus’ behavior showed that fatherless animals seemed to have a lack of impulse control, Dr. Braun says. And, when they played with siblings, they engaged in more play-fighting or aggressive behavior.

In a separate study in Dr. Braun’s lab conducted by post-doctoral researcher Joerg Bock, degu pups were removed from their caregivers for one hour a day. Just this small amount of stress leads the pups to exhibit more hyperactive behaviors and less focused attention, compared to those who aren’t separated, Dr. Braun says. They also exhibit changes in their brain.

The basic wiring between the brain regions in the degus is the same as in humans, and the nerve cells are identical in their function. “So on that level we can assume that what happens in the animal’s brain when it’s raised in an impoverished environment … should be very similar to what happens in our children’s brain,” Dr. Braun says.

Read the whole thing.

Related posts

New peer-reviewed study links abortion and breast cancer

The abstract of the paper is posted here. (H/T Jennifer Roback Morse)

Excerpt:

On multivariable logistic regression analysis, age (≥ 50) years (OR 2.61, 95% CI 2.20–3.11), induced abortion (OR 1.66, 95% CI 1.38–1.99), and oral contraceptive use (OR 0.60, 95% CI 0.48–0.74) were found to be associated with breast cancer risk as statistically significant independent factors.

These findings suggest that age and induced abortion were found to be significantly associated with increased breast cancer risk whereas oral contraceptive use was observed to be associated with decreased breast cancer risk among Turkish women in Istanbul.

These findings mean that women who have abortions are 66% more likely to develop breast cancer than women who don’t. And those who use oral contraceptives are 40% less likely to develop breast cancer than women who don’t.

More adult stem cell advances

ECM sent me a Telegraph article on adult stem cell research. (Source: Secondhand Smoke)

A lot of abortion supporters like to talk about all the medical advances we will have a few decades from now by using human embryos (which are persons) for medical research. But the news media doesn’t really want to report much on all the proven cures that adult stem-cell research give us today.

Excerpt:

British scientists have developed a stem cell technique which is being used by patients to avoid hip replacements, in a major medical breakthrough. Doctors in Southampton are using the pioneering technique, where a patient’s damaged bones are repaired using their own stem cells. Patients hailed the treatment, after many found they could walk normally again without any pain and without the need for hip replacement surgery. So far six patients have had the treatment with only one failure, doctors said.

Why should we pursue the medical program of Nazi Germany when we can have cures today without killing anybody?