Which of the following is likely to have the most price elastic demand?

The high period of immigration in the first half of the 19th century was caused by

a. the Irish potato famine. b. political unrest in Europe. c. political unrest in China. d. Only a and b are correct. e. None of the above are correct.

Which of the following will not shift the demand curve for grapefruit?

a. An announcement that eating a grapefruit before every meal will induce weight loss. b. A technical development that allows machines to replace the workers who harvest grapefruit. c. An announcement that eating lots of grapefruit causes skin problems. d. A newspaper story reporting that the preference for oranges has skyrocketed. e. An announcement that grapefruit will definitely cost more next week.