ions.(其他资源的限制)РBudget Constraints?预算约束的严格表示РCommodity prices are p1, p2, …, pn.?Q: When is a bundle (x1, …, xn) affordable at prices p1, …, pn?在价格一定的情况下消费者最大的消费是什么??A: When? p1x1 + …+ pnxn £ m?where m is the consumer’s (disposable可任意使用的) e.РBudget ConstraintsРThe bundles that are only just affordable form the consumer’s budget constraint. This is the set(正好将预算消费完毕的集合表示方式)??{ (x1,…,xn) | x1 ³ 0, …, xn ³ 0 and ? p1x1 + …+ pnxn = m }.РBudget ConstraintsР注意预算集与预算约束的区别(表达形式)?The consumer’s budget set (预算集的集合表示)is the set of all affordable bundles;?B(p1, …, pn, m) =?{ (x1, …, xn) | x1 ³ 0, …, xn ³ 0 and? p1x1 + …+ pnxn £ m }?The budget constraint is the upper boundary of the budget set.РBudget Set and Constraint for modities?(两种商品的预算约束和预算集)Рx2Рx1РBudget constraint is?p1x1 + p2x2 = m.Рm /p1Рm /p2
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