In the second step of logging in value-added services, click on "My Network Value-added Services" above to enter the bookshelf list and find the books that need to download PPT. Enter the third step of my activation bookshelf, click on the book, enter the resource details list, find the PPT resource to download, and click the download button to download.
The market structure of book distribution and its causes;
Market concentration refers to whether an industry is concentrated in a few enterprises or dispersed in many enterprises, that is, the degree of market control by a few enterprises. The measurement index of market concentration of an industry is often used as an important index to determine the market structure of the industry.
Next, we will make a descriptive analysis of the market concentration of the book distribution industry in China by investigating the sales of the book distribution industry from 1997 to 1999.