Investigate whether the Robust option makes a difference. For the Kuiper data that has been used in this chapter (don’t forget to drop some observations that are outliers!), run a basic model 20 times (for example, the type in Table 12.4). Run it 20 more times with the Robust option invoked. Characterize any differences between the results. For example, is there less variability in the R2? Is the difference between training R2 and validation R2 smaller? Now include the outliers, and redo the analysis. Has the effect of the Robust option changed?

Astock is selling today for $50 per share. at the end of the year, it pays a dividend of $3 per share and sells for $58. a. what is the total rate of return on the stock? (enter your answer as a whole percent.) b. what are the dividend yield and percentage capital gain? (enter your answers as a whole percent.) c. now suppose the year-end stock price after the dividend is paid is $42. what are the dividend yield and percentage capital gain in this case? (negative amounts should be indicated by a minus sign. enter your answers as a whole percent.)

Select the correct answers. mila is at a flea market. she has $50 in her wallet. she decides that she will spend $15 on jewelry, $20 on a pair of jeans, $5 on a t-shirt, and $10 on something to eat. she likes a one-of-a-kind t-shirt, but the seller is not ready to sell it for less than $8. she thinks of five ways to deal with this situation. which two choices indicate a trade-off?

Which of the following is an example of a production quota? a. the government sets an upper limit on the quantity that each dairy farmer can produce. b. the government sets a price floor in the market for dairy products. c. the government sets a lower limit on the quantity that each dairy farmer can produce. d. the government guarantees to buy a specified quantity of dairy products from farmers.