Comparing Figure 1-1 on page 14 where the growth rate in output per hour in the first period is 1.79 while in Figure 1-2 on page 16 in Gordon, the growth in output per hour in the first period is 1.50, the difference is because Group of answer choices The time periods presented are difference Figure 1-2 decomposes the growth in output per hour into its components Figure 1-1 does not include TFP All of these