Dr. humor wonders if knock-knock jokes are funnier than jokes involving “crossing the road.” he has several people tell participants a series of both types of jokes and has the participants rate how funny they believe each joke to be. in this example, the dependent variable is

in about winter like late november to january

i believe the answer is: returns on investments, no wages

people who belong in upper class society would most likely get there by obtaining multiple source of income, which a certain percentage of ownership for businesses. since most of them are job creator, they would most likely get their money from profit, not wages.