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September 15, 2012

Reading, Writing, and Rabble-Rousing Does unionization make for better teachers?

Brian Palmer:

The Chicago teacher strike seemed to be heading toward resolution on Thursday, although school probably won't be back in session until next week. Among the teachers' complaints was Mayor Rahm Emanuel's plan to base evaluations largely on student test scores and to expand charter schools that hire non-union teachers. Are unionized teachers better than non-unionized teachers?

It's not clear. Despite decades of trying, no one has come up with a perfect study design to measure the effects of unionization on teacher performance. One strategy favored by economists is to ask what happens to student outcomes when the teachers in a school district unionize. These studies don't reflect well on unions. An oft-cited 1996 study found that the high school dropout rate in a school district increases 2.3 percentage points after its teachers unionize. The study also suggested that unionization tends to soak up a district's financial resources: When non-union districts increase salaries and reduce class size, the dropout rate decreases. In unionized districts, however, the dropout rate is virtually impervious to increased spending. Another studied, published in 2009, was slightly kinder to unions, finding that teacher unionization had no significant impact on the dropout rate.

Posted by Jim Zellmer at September 15, 2012 1:20 AM
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