The following questions are based on the artide by Flammer, C. (2021), Corporate green bonds part of the Journal of Financial Economics, 2021: -What is an event study in the field of finance and what event was used in the study? (2 points) -Why and how did the authors have to calculate an abnormal return? (3 points) -Flammer (2021) finds no difference between the yields of green versus brown bonds, What are potential explanations for this result? (4 points