DWD20200401

David's Time With Peter F. Drucker 2020.4.1 The Distribution of Income Shifts in the shares of disposable income are just as important as shifts in population, but usually even less attention is paid to them. And they are likely——indeed all but certain——to be as dramatic as the demographic changes during the first decades of the 21st century. Businesses and industries have become highly conscious of their market standing. They all keep figures on their sales and know whether their sales go up or down. All of them know whether they grow in volume or not. But practically none knows the truly important figure: the share of the disposable income of their customers——whether other institutions and businesses or ultimate consumers——that is being spent on the products or services that they produce and sell. And practically no one knows whether the share goes up or down. ——《Management Challenges for the 21st Century · Chapter2》(Peter F.Drucker,1999)