TABLE 12. VARIABILITY IN PROJECTED GNP

(Coefficient of variation)

							This Study

		Nordhaus and Yohe		Uncorrelated	Correlated*
	2000	18.7				20.5		27.7
	2025	24.2				41.1		58.0
	2050	31.0				64.3		91.7
	2075	38.4				90.1		128.1

*Productivity growth rates were chosen to assure a correlation (Spearman rank) between regions of .9.