Define, using your own words, the following concepts. a. Instrumental variable
b. Exclusion restriction
c. Conditional mean independence
d. Parallel trends (in the context of Difference in Differences)
e. Fixed effects.

The next dividend payment by savitz, inc., will be $2.08 per share. the dividends are anticipated to maintain a growth rate of 6 percent forever. if the stock currently sells for $42 per share, what is the required return?

Suppose the number of equipment sales and service contracts that a store sold during the last six (6) months for treadmills and exercise bikes was as follows: treadmill exercise bike total sold 185 123 service contracts 67 55 the store can only sell a service contract on a new piece of equipment. of the 185 treadmills sold, 67 included a service contract and 118 did not.

Lusk corporation produces and sells 14,300 units of product x each month. the selling price of product x is $25 per unit, and variable expenses are $19 per unit. a study has been made concerning whether product x should be discontinued. the study shows that $72,000 of the $102,000 in monthly fixed expenses charged to product x would not be avoidable even if the product was discontinued. if product x is discontinued, the annual financial advantage (disadvantage) for the company of eliminating this product should be: