Income is conventionally denoted by "Y" in economics. John Hicks used "I" for income, but Keynes wrote to him in 1937, "following seeking the two, I feel it truly is easier to use Y for income and I for expenditure. That is a type of passive income, but it will https://income-streams12837.timeblog.net/71031980/the-2-minute-rule-for-income