Hi, I have an unbalanced panel data with id year (1997-2003) and I would like to calculate the growth in the population for 5 years. I was trying to use this formula (population [t = 0] – population [t = -5])/population [t = -5], but it does not work. Then I tried using lags, but I don`t know how that works. Could someone help me? Thank you!