Suppose that a labor economist finds that one of her research subjects has earned significantly higher wages throughout his lifetime than would be predicted by standard measured variables. the economist also notes that each of the subject’s positions was found through connections at his family's exclusive country club. which one of the following most likely explains this person's unusually high earnings? effort efficiency wages chance compensating differentials suppose that sharon receives higher pay at her workplace than her colleagues do, even though they perform essentially the same type of work. if sharon's productivity is about 25% higher than that of each of her colleagues, which of the following wage concepts can explain this wage disparity? check all that apply. human capital efficiency wages natural ability discrimination the superstar phenomenon

John and daphne are saving for their daughter ellen's college education. ellen just turned 10 at (t = 0), and she will be entering college 8 years from now (at t = 8). college tuition and expenses at state u. are currently $14,500 a year, but they are expected to increase at a rate of 3.5% a year. ellen should graduate in 4 years--if she takes longer or wants to go to graduate school, she will be on her own. tuition and other costs will be due at the beginning of each school year (at t = 8, 9, 10, and 11).so far, john and daphne have accumulated $15,000 in their college savings account (at t = 0). their long-run financial plan is to add an additional $5,000 in each of the next 4 years (at t = 1, 2, 3, and 4). then they plan to make 3 equal annual contributions in each of the following years, t = 5, 6, and 7. they expect their investment account to earn 9%. how large must the annual payments at t = 5, 6, and 7 be to cover ellen's anticipated college costs? a. $1,965.21b. $2,068.64c. $2,177.51d. $2,292.12e. $2,412.76