Why Does the Gravity Model Work

question 17

Multiple Choice

Why does the gravity model work?

• A) Large economies became large because they were engaged in international trade.
• B) Large economies have relatively large incomes, and hence spend more on government promotion of trade and investment.
• C) Large economies have relatively larger areas, which raises the probability that a productive activity will take place within the borders of that country.
• D) Large economies tend to have large incomes and tend to spend more on imports.
• E) Large economies tend to avoid trading with small economies.

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Definitions:

REM Sleep

A phase of sleep characterized by rapid eye movements, vivid dreaming, and increased brain activity.

Genital Arousal

The state of sexual excitement and readiness for sexual activity, evidenced by physiological reactions in the genital organs.

Night Terrors

Intense episodes of panic and fear that occur during sleep, typically in children, causing them to wake up in a terrified state.

Bed-Wetting

The involuntary urination while asleep after the age at which staying dry at night can be reasonably expected.