Hello, I've estimated linear model regression time dummies' coefficients using "adjacent periods" approach for 5 year period (b1 = -0.5, b2= -15, b3 = -2, b4 = -19), . Now I would like to estimate percentage change between years by using initial year as a base period. How to do this? My guess is that I need to use some weights? Any guidance would be appreciated. Best regards.