Figure 7.
A line diagram plots productivity on the vertical axis and time on the horizontal axis. The productivity curve begins near the level marked 1 and declines after the vertical dashed line labelled T 1. The curve continues downward to a lowest point near the vertical dashed line labelled T 2. After T 2, the curve rises gradually until it approaches the level near 1 close to the vertical dashed line labelled T R E. A horizontal double headed arrow spans the interval between T 1 and T R E above the curve. A label rapidity appears near the rising section of the curve. Vertical dashed lines mark the time points T 1, T 2, and T R E.Rapidity
Source: Authors’ own work