政治经济学

例句：

1. 1.Political science is the study of politics and government.
   政治科学是研究政治和政府的学科。
2. 2.The economics department at our university focuses on studying the relationship between economics and politics.
   我们大学的经济系专注于研究经济学与政治之间的关系。
3. 3. He believes that understanding political economy can help us make better decisions in business.
   他认为理解政治经济学可以帮助我们在商业中做出更好的决策。