每当科技股上升时,美国的股评家就会惊呼:“科技股又卷土重来了!”但从长期来看,科技股的表现是否令人满意?历史给出的答案是否定的。毫无疑问,科技对世界经济增长具有至关重要的作用。它推动了生产率的增长,并有望在未来改变整个世界。技术进步创造了互联网,使通讯成本出现雪 Whenever tech stocks rise, US stock analysts will exclaim: “Technology stocks have come back!” But in the long run, are technology stocks performing satisfactorily? The answer given by history is no. There is no doubt that science and technology play a crucial role in world economic growth. It drives productivity growth and is expected to change the world in the future. Technological advances have created the Internet, making the cost of communications snow appear