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<p>The [Hout</a> report](<a href=“http://academic-senate.berkeley.edu/sites/default/files/committees/aepe/hout_report_0.pdf]Hout”>http://academic-senate.berkeley.edu/sites/default/files/committees/aepe/hout_report_0.pdf) explains it (page 20, which is page 24 of the PDF).</p>