I added an image of the regression output I could use some help with, as I am trying to recreate this but with data from a different time period.
This is the result of a difference-in-difference regression. Event, Affected and BHC are all dummy variables. The top part is just the standard output of the regression, the bottom part is added by the author, and this is what I'm interested in.
How is Event x Affected for BHC = 1 calculated? I'm pretty sure it is just the difference between Event x Affected and the triple interaction. But if it is just calculated by doing 0.0104-0.0089 why is it not 0.0015 and how would you go about getting the standard deviation (0.0019)?