関連ワード:  what is scarce in economics    what is scarcity in economics    what is scarcity in economics with example    what is scarcity in economics class 11    what is scarcity in economics class 12    what is scarcity in economics simple definition    what is scarcity in economics pdf    what is scarcity in economics with example class 11    what is scarcity in economics with example pdf    what is scarcity in economics short definition