辛苦老师简单介绍一下spreadsheet model，谢谢

问题如下：

Jackson’s understanding of when he would switch from an H-model to a spreadsheet model is best described as:

选项：

A.correct. B.incorrect with respect to the difference in growth rates. C.incorrect with respect to the length of the first growth period.

解释：

Solution

A is correct. Jackson’s understanding is correct. The H-model is appropriate to use when the transition from a higher rate of growth to a lower one is linear over time but does not provide a very close approximation for a long extraordinary growth period or for a large difference in growth rates.

B is incorrect. Jackson’s understanding is correct with respect to the growth rates. The H-model is appropriate to use when the transition from a higher rate of growth to a lower one is linear over time.

C is incorrect. Jackson’s understanding is correct with respect to the length of the first growth period. The H-model is appropriate to use when the transition from a higher rate of growth to a lower one is linear over time, but it does not provide a very close approximation for a long extraordinary growth period.