V
　　 value of the marginal product 边际产量价值
　　 The marginal product of an input times the price of the output
　　 Variable costs 可变成本
　　 Cost that do vary with the quantity of output produced
　　 Velocity of money 货币流通速度
　　 The rate at which money changes hands
　　 Vertical equity 纵向公平
　　 The idea that taxpayers with a greater ability to pay taxes should pay larger amounts
　　 variable inputs 可变投入
　　 inputs that rise or fall with the quantity of output
　　 velocity 流通速度
　　 the speed with which money circulates in the economy, defined as the ratio of income to the money supply
　　 vertical merger 纵向兼并
　　 a merger between two firms, one of which is a supplier or distributor for the other
　　 voluntary unemployment 自愿失业
　　 a situation in which workers voluntarily drop out of the labor force when the wage level falls
　　 voting paradox 投票悖论
　　 the fact that under some circumstances there may be no determinate outcome with majority voting: choice A wins a majority over B, B wins over C, and C wins over A 编辑预祝家金榜题名！