在现代经济结构中,我们已强调了大部分经济部门由相当少数大公司支配的程度。但是,这并不意味着小公司不再存在。相反,整个经济中有成百上千个小公司。每年有数千个小公司诞生,也有数千个小公司倒闭。小公司诞生和倒闭的速度均趋于很高。但正象不是所有大公司都有完全一致的特征一样,小公司总体之内也有重要差异,这就导致我们产生了现代经济组分 In the modern economic structure, we have emphasized the extent to which most sectors of the economy are dominated by a relatively small number of large corporations. However, this does not mean that small businesses no longer exist. On the contrary, there are hundreds and thousands of small companies throughout the economy. Thousands of small companies are born each year, and thousands of small companies are closed down. The speed at which small companies are born and closed tends to be high. But just as not all companies have exactly the same characteristics, there are also important differences within the overall company, which leads us to the emergence of modern economic components