Hi everybody I want to construct a proxy variable for the probability that a person from country x arrived in Italy in the year y is a refugees or not. I obtained this proxy using 2 different type of data: in the first case I divided the number of residence permits for humanitarian reason over the total number of residence permits, the second is the ration between the number of application in the year y for people coming from country x divided the total number of application in that year. It was wondering if its make sense to standardize these two variable or not. Could you help me please?