incentive theories的用法和样例：
例句
- Need theories are sometimes called content theories of motivation because they specify what motivates individuals.
需求理论具体指出刺激个人行为的因素，所以有时称为内在的激励理论。 - By analyzing the economic behavior of political agents using the incentive theory in economics, we can find out the reasons for the inefficacy of external incentives.
摘要用经济学激励理论分析政治代理人的经济行为，可以发现官员外在激励有效性不高的原因。
