the practice of cutting prices below the marginal costs of production to drive out a new firm (or to deter future entry), at which point prices can be raised again
present discounted value 现期贴现值
how much an amount of money to be received in the future is worth right now
price index 价格指数
a measure of the level of prices found by comparing the cost of a certain basket of goods in one year with that cost in a base year