How to lie with statistics – example 322

Paul Kedrosky reproduces some data on supposedly  fast growth industries:

According to a new study, here are the best and worst performing industries of the last decade as measured in revenue percentage change terms. Here are the leaders:

Some of these are doubtless valid, but the top 4 are all industries that had virtually no revenue at all in the 1990s, since they basically did not exist were not measured until Internet companies started to go public.  It’s easy to have an astronomical growth rate if you make the base number small enough. Startups do this a lot – “our revenue grew 1500% in our first 2 years.” That could mean they had $1000 of revenue in year 1, and $15000 in year 3!

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