The 12th edition of Microeconomic Theory: Basic Principles and Extensions continues a successful collaboration between the authors starting with the 10th edition. This edition represents our efforts to continue refining and modernizing our treatment of microeconomic theory. Despite the significant changes appearing in virtually every chapter, the text retains all of the elements that have made it successful for so many editions. The basic approach is to focus on building intuition about economic models while providing students with the mathematical tools needed to go further in their studies. The text also seeks to facilitate that linkage by providing many numerical examples, advanced problems, and extended discussions of empirical implementation—all of which are intended to show students how microeconomic theory is used today. New developments continue to keep the field exciting, and we hope this edition manages to capture that excitement.

第12版的作者继续与第10版的基本理论展开合作。这个版本代表了我们对微观经济学理论的不断完善和现代化的努力。尽管几乎每一章都有重大的变化，但文本保留了许多版本成功的元素。基本的方法是在为学生提供进一步学习所需的数学工具的同时，注重建立关于经济模型的直觉。本文还试图通过提供许多数值例子、高级问题和对实证实施的扩展讨论来促进这种联系，所有这些都旨在向学生展示微观经济学理论在今天是如何使用的。新的发展继续保持该领域的兴奋，我们希望这一版本设法捕捉到这种兴奋。