Pharmaceutical Pricing and R&D as a Global Public Good.

A regression that includes ln GDP as the sole explanatory variable explains 89% of the variation in the log of contributions across countries and is highly significant at better than the 1% level, with a t‐statistic of 16; see Table 3 , Column 1.

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The comparable test statistic based on Table 3 , Column 2 is now 2.0 (0.17/0.085) which is statistically significant at the 10.0% level and nearly statistically significant at the 5% level in a two‐tailed test.

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