Monthly Archives: May 2009

Quasi-experiments at Google: Evaluation insights

Google’s statisticians routinely use randomized experiments to improve their products (and profit), but did you know they also conduct quasi-experiments when random assignment is not feasible? I receive the American Statistical Association’s (ASA) membership magazine called Amstat News. Daryl Pregibon, … Continue reading

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Boundary Waters Canoe Area Wilderness (BWCAW) maps in Google Earth

It has been a while since I’ve posted any fun, canoe-related content. So I created a set of Google Earth KML maps of the BWCAW. I was inspired to post the map set after I saw the UMN Borchert Map … Continue reading

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Proficiency maps in Google Earth

With spring semester in my rear view mirror, I found some time to use the maptools package to make a proficiency map that can be displayed in Google Earth. It’s essentially a choropleth map in Keyhole Markup Language (KML) format. … Continue reading

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