One example of thinking at the margin is

deciding to buy a car you don't really like because it is significantly less expensive than the one you want.

putting all of your money in a savings account because the interest rates are so high.

determining whether it is better to spend your savings on a new cd player or on a television.

deciding whether the benefit of working two extra hours per day is worth the sacrifice of study time.

Select the correct answer the smith family adopted a child. the adoption procedure took about three months, and the family incurred various expenses. will the smiths receive and financial benefit for the taxable year? a) they will not receive any financial benefit for adopting the child b) their income tax component will decrease c) they will receive childcare grants d) they will receive a tax credit for the cost borne for adopting the child e) they will receive several tax deductions

True or false: a fitted model with more predictors will necessarily have a lower training set error than a model with fewer predictors.

Camilo is a self-employed roofer. he reported a profit of $30,000 on his schedule c. he had other taxable income of $5,000. he paid $3,000 for hospitalization insurance. his self-employment tax was $4,656. he paid his former wife $4,000 in court-ordered alimony and $4,000 in child support. what is the amount camilo can deduct in arriving at adjusted gross income (agi)?