John is an athlete. he has $120 to spend and wants to buy either a heart rate monitor or new running shoes. both the heart rate monitor and running shoes cost $120, so he can only buy one. this illustrates the principle that a. rational people think at the margin. b. trade can make everyone better off. c. people respond to incentives. d. people face trade-offs.

He dutch west india company wanted to establish a colony in north america to expand its trading empire. enjoy religious freedom. encourage catholics to leave holland. form a representative democracy.

Which of the following discoveries would be most likely to cause a scientific paradigm shift? a. the discovery of more rings around uranus b. the discovery of a new pathogenic virus transmitted by mosquitoes c. the discovery that a dormant volcano is showing signs of activity d. the discovery of a new species of salamander in the amazon rainforest e. the discovery that excess heat is radiating from the center of the earth and causing global climate change

How do corporate finances, investor expectations and external forces influence stock prices and possibly pose a risk to investors