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Jorge Camoes

Probably there are circumstances where you can use this type of chart, but not in this case.

A simple bar chart with overlapping series should be enough, and it is not at all intimidating. I've been playing with overlapping series in population pyramids and not only you have a clearer view of proportions by age group but you also maintain the "pyramid" profile.

derek

I think the scatter chart is best. I had hoped for some nice insights from my favourite scatter chart trick, the grid of diagonal lines, but nothing much appears to jump out.

It appears that the largest advertisers had the lowest proportional unmeasured spend while the smallest (among the majors) had the highest. (It's only a weak correlation: a linear fit yields only 16% R-squared.)

If instead you hypothesise that big advertisers spend a quarter as much on unmeasured media as on measured media, plus another half billion or so, the R^2 is 43%. y=0.254x+480 [chart]

The half billion accounts for the increase in proportion among smaller advertisers. I don't say 43% is good, only that it's an indication of how comparatively weak an inverse linear relation between total ad spend and percentage unmeasured media is.

Jesper

Although the scatter plot is better for analytical purposes I think that it would be above the heads of 99% of NYT readers. I guess this kind of consideration really limits the kind of visualization that could be considered.

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