real labor productivity

(e.g.)

growth in real labor productivity

	Real GDP per labor hour	Capital per labor hour
2001	$20.00	$35.00
2007	$21.50	$36.80

Growth in real labor productivity = $21.50/$20.00 - 1 = +7.50%

Growth in capital per labor hour = $36.80/$35.00 - 1 = +5.14%
One-third rule:
+5.14% * (1/3) = 1.71% --> contribution to labor productivity due to growth in capital per labor hour

7.50% - 1.71% = 5.79% growth in labor productivity is due to improvements in technology.