The Bureau of Labor Statistics adjusts monthly data on employment to smooth out routine seasonal changes. In 10 of the last 12 months, the BLS has adjusted its numbers by more than one standard deviation from its historical average. Standard deviation is used to measure how far from the average a data point falls to determine how abnormal the data are.
What's new on AEI
|Making Ryan's tax plan smarter|
|The teacher evaluation confronts the future|
|How to reform the US immigration system|
Please join AEI for a conversation among several contributors to the new volume “Teacher Quality 2.0: Toward a New Era in Education Reform” (Harvard Education Press, 2014), edited by Frederick M. Hess and Michael Q. McShane. Panelists will discuss the intersection of teacher-quality policy and innovation, exploring roadblocks and possibilities.