Worse Than Macroeconometrics

Steve McIntyre seems to pour cold water on a study allegedly demonstrating global warming.

As you see, there is a persistent decline in the alkenone reconstruction in the 20th century using published dates, but a 20th century increase using Marcott-Shakun dates.

Changing the dates of observations? Even macroeconometricians do not try that one.

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4 Responses to Worse Than Macroeconometrics

  1. Sam says:

    Isn’t that exactly what Valery Ramey was doing when trying to find the best dates to attribute stimulus preparation and spending to?

  2. Trey says:

    For a good summary, see this guest post at climate scientist Judith Curry’s blog:

    http://judithcurry.com/2013/03/19/playing-hockey-blowing-the-whistle/

    Basically, the Science article gets a steep rise in the 20th century temperature (hockey stick) because they shifted a few proxy time series (in)conveniently in time.

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