In the past, there was a strong correlation between ice cream consumption by children and polio cases for children. There was not a causal relationship due to:
A. a common underlying omitted variable.
B. reverse causality.
C. accounting fraud practiced by Baskin Robbins.
D. an infection present in cherries.
A. a common underlying omitted variable.
You might also like to view...
How is monopolistic competition different from a monopoly?
a. Monopolistic competition has difficult entry; a monopoly has easy entry. b. A monopoly has strong control over a product; monopolistic competition has little control over a product. c. Monopolistic competition has similar (but not identical) brands; a monopoly has one brand. d. A monopoly has zero long-run economic profits; monopolistic competition has high long-run economic profits.
The Keynesian cause-and-effect sequence predicts that an increase in the money supply will cause interest rates to:
A. fall, boosting investment and shifting the AD curve rightward, leading to an increase in real GDP. B. fall, cutting investment and shifting the AD curve leftward, leading to a decrease in real GDP. C. rise, cutting investment and shifting the AD curve rightward, leading to an increase in real GDP. D. rise, boosting investment and shifting the AD curve rightward, leading to an increase in real GDP.
Exhibit 4-6 Demand and supply curves
If market supply decreases and, simultaneously, market demand increases, the new equilibrium will show:
A. market price will decrease, and market quantity exchanged will increase. B. market price will increase, and market quantity exchanged will decrease. C. market price will increase, and the quantity exchanged could increase, decrease, or remain the same. D. market price could increase, decrease, or remain the same, and quantity exchanged will increase.
The price ceiling that the federal government placed on human organs caused
A. A shortage. B. An increase in supply. C. A surplus. D. An increase in demand.