Figure 2
The plot shows the treatment effect across four different years. The horizontal axis is labeled “Year” and is marked with 2015, 2016, 2017, and 2018. The vertical axis is labeled “Treatment Effect” and ranges from 0.00 to 0.20 in increments of 0.05 units. A horizontal dotted reference line is positioned at 0.00 on the vertical axis. The plot shows four circular points for each year, with vertical error bars. The coordinates of the circular points are as follows: (2015, 0.008), (2016, 0.015), (2017, 0.195), and (2018, 0.068). Note: All numerical data values are approximated.Parallel trend analysis by yearly treatment effect on SGA