Ross McKitrick, University of Guelph Department of Economics
Figure 3 in the Cooler Heads Briefing on TBS contains an error. Tim Lambert of Australia has pointed out that missing data were handled differently between Figures 2
and 3, and when this is fixed the example no longer illustrates the intended point. The point (that the trend can change if the averaging rule is changed) is shown in
Revised Spreadsheet. Our thanks to Tim Lambert for pointing out the error.
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