Tag Archives: statistics

We’ve covered quite a bit of positive research regarding private school choice in recent months. Back in May, I wrote about a meta-study by researchers at the University of Arkansas that found positive effects from vouchers in the U.S. and a couple of other countries. The following month, we dug into the Friedman Foundation’s latest review of random-assignment studies on private school choice programs in the United States. Fourteen of the 18 studies included in that review found positive effects for at least some groups of students. Two found no visible effects, and two more—both from Louisiana—found significant negative effects. As I’ve said before, there are good reasons to believe that program design and implementation issues played a role in the negative findings in Louisiana. Now, though, I’m sorry to report that I’ve become aware of less easily explained bad news on voucher programs in Ohio and Indiana. But don’t fret just yet; there are some major caveats that need to be considered before we start jumping to broad conclusions. Buckle up, today’s post will be a long and nerdy one.

Have you ever been accused of saying something you didn’t? You know, like the time your mom thought you nodded slightly after she asked if a new dress made her look fat, but you were really just looking at a ball of fuzz on the floor? Or when someone accused you of being a data-distorting Common Core supporter when you actually aren’t? Wait, you mean that second thing hasn’t happened to you? I guess it must just be me. We six-year-olds are always getting picked on! I returned from Christmas break yesterday to find a trackback on a post I wrote back in October about what this year’s NAEP results do and do not mean. In that post, I chided anti-reform activists—at that point in full rhetorical tilt just days before the catastrophic November elections—for leaping to unfounded statistical conclusions about the NAEP scale score drops in math that Colorado experienced in 2015. The trackback led me to a Breitbart article by Ze’ev Wurman, a prominent national critic of Common Core. I was initially happy to see Little Eddie’s informal work picked up by a national education writer, but that excitement evaporated when I looked a little more closely and […]

Sometimes I just want to get nerdy. I don’t mean kind of nerdy, like when we throw around phrases like “statistical significance” and call it a day. I mean really, truly nerdy. The kind of nerdy that involves using words like “exogeneity,” which is so obscure a term that Microsoft Word tells me it isn’t a word at all. In response, I proudly push my glasses up my nose and declare that not only is exogeneity a word, it is a word that matters. What in the world am I talking about? The controversial new Education Next school funding study by C. Kirabo Jackson, Rucker C. Johnson, and Claudia Persico, of course! If you are one of those cool kids who doesn’t spend every morning perusing the latest studies on education, the quick and dirty on the study is this: It upends a great deal of research suggesting that simply increasing public school funding does little to increase academic achievement. Instead, it finds that if one changes the design of the research, large impacts are revealed. The proposed solution? You guessed it: More money. From the study itself (emphasis added): Previous national studies have examined the relationship between school resources […]

The big story in the news is about President-elect Obama’s giant “stimulus” plan – better known as a giant spending spree that hangs even more debt on the shoulders of me and other kids growing up around America. That part is bad enough. But three leading education reformers – Michael Petrilli, Checker Finn, and Frederick Hess – see other serious problems that it will create for trying to improve our schools and help students learn. In the column they wrote for National Review yesterday, the authors challenge the suggestion that tons of federal government money “invested” in education will yield more positive results down the road: In concept, of course, well-delivered education eventually yields higher economic output and fewer social ills. But there’s scant evidence that an extra dollar invested in today’s schools delivers an extra dollar in value — and ample evidence that this kind of bail-out will spare school administrators from making hard-but-overdue choices about how to make their enterprise more efficient and effective.