Answer: The fair market value of the free tour to Costa Rica is a taxable income.
Professor Vanessa Lazlo won the free tour in a draw, where a prize is awarded by chance.
Publication 525 of the IRS defines taxable and non taxable income.
The IRS lists winnings from raffles and lotteries under Other income.
It also declares that the fair market value of winnings from raffles and lotteries are winnings from gambling. Hence the fair market values of non cash prizes are taxable and must be included as income.