In 2013, the U.S. spent more on research and development than any other country in the world

What would be the impact of a virus that infected the Midwestern corn crop?

a. Price of corn increases and the price of wheat decreases b. Price of corn decreases and the quantity of wheat increases c. Quantities of corn and wheat increase d. Quantity of corn decreases and the price of wheat increases

Which of the following would tend to increase the price of lumber?

a. a technological advance that lowers the cost of cutting timber b. an increase in the demand for newly constructed homes c. a decrease in the demand for wooden rocking chairs d. a decrease in the tax imposed on firms who produce lumber