test driving Amazon Web Services’ Elastic MapReduce

Hadoop provides software infrastructure for running MapReduce tasks, but it requires substantial setup time and availability of a compute cluster to take full advantage of. Amazon’s Elastic MapReduce (EMR) solves these problems; delivering pre-configured Hadoop virtual machines running on the cloud for only the time they are required, and billing only for the computation minutes […]

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the future orientation index

I’ve recently discovered Google Trends and have been looking for an opportunity to use it. Today I found such opportunity in a paper [1] published last April that computes countries’ “future orientation index” from Google Trends data and correlates it with national per-capita GDP. The authors report correlation for 2010; my experiment with Google Trends […]

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using Hadoop to examine county-level industrial diversity

In a previous post, I computed each U.S. county’s industrial diversity from the 2009 County Business Patterns data published by the U.S. Census Bureau. The diversity calculation made use of Shannon’s information entropy equation, which is similarly used by ecologists to calculate species diversity for a region. Here I perform the same calculation using Hadoop, […]

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