凯恩斯理论的形成时间

中文段落：

凯恩斯理论，也被称为凯恩斯经济学，是在20世纪30年代初形成的。当时，全球经济正经历着一次严重的经济危机，许多国家陷入了深度的经济衰退。面对这种情况，英国经济学家约翰·梅纳德·凯恩斯提出了一系列新的经济理论和政策建议，旨在解决经济衰退和失业问题。

凯恩斯理论的核心思想是，在经济衰退期间，政府应该采取积极的财政政策，通过增加公共支出和减少税收来刺激总需求。他认为，这样做可以有效地提高就业率，促进经济增长，并帮助国家摆脱经济危机。

凯恩斯的理论在当时引起了广泛的关注和讨论。虽然有些经济学家对他的观点持保留意见，但他的理论很快成为了许多国家制定经济政策的重要参考。在二战后，凯恩斯理论更是成为了全球范围内的主流经济学理论之一，对世界经济产生了深远的影响。

英文段落：

Keynesian theory, also known as Keynesian economics, emerged in the early 1930s. At that time, the global economy was experiencing a severe economic crisis, with many countries陷入 deep recession. Against this backdrop, British economist John Maynard Keynes put forward a series of new economic theories and policy recommendations aimed at addressing economic decline and unemployment.

The core idea of Keynesian theory is that during economic downturns, governments should adopt proactive fiscal policies to stimulate aggregate demand through increased public spending and tax cuts. He believed that this approach could effectively boost employment, promote economic growth, and help countries overcome economic crises.

Keynes's theory garnered widespread attention and discussion at the time. While some economists were skeptical of his views, his theory soon became an important reference for many countries in formulating economic policies. After World War II, Keynesian theory emerged as one of the mainstream economic theories globally, exerting profound influence on the world economy.