<p>assignment 明天交 omg! 大侠们帮帮偶啊</p><p>原题如下：explain whether the following statements are true or false</p><p>a.If all consumers are price-takers(i.e they take the prices of all commodities as given),then the marginal rate of substitution in consumption will be the same across consumers, given the consumption bundles they choose.</p><p></p><p>b.the price elasticity of demand for comomodity (dlnx/dlnP) cannot all be greater than zero.</p><p>需要解释一下为什么 先谢过了！！</p><p></p>