On Price Caps Under Uncertainty

On Price Caps Under Uncertainty
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不确定性下的价格上限

DOI:
10.2139/ssrn.908577
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发表时间:
2006
期刊:
Microeconomic Theory eJournal
影响因子:
--
通讯作者:
Tymon Tatur
Tymon Tatur
中科院分区:
--
文献类型:
--
作者:
K. Schmedders;R. Earle;Tymon Tatur

文献摘要

被引文献

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本文展示了在需求不确定的情况下,支持实施价格上限的标准论点是如何被打破的。特别是,虽然在确定性的情况下,引入或降低价格上限(高于边际成本)的结果,在增加产量,增加总福利,降低价格,增加消费者福利,我们表明,所有上述比较静态预测失败的一般不确定的需求函数。例如,当价格上限接近边际成本时,在一定的温和条件下,价格上限的降低总是导致产量和总福利的下降。在更强的规律性假设下,如果我们将注意力限制在任意固定区间内的价格上限(只要价格上限对该区间内的某些值具有约束力),则确定性情况下的所有单调比较静态预测也不成立或一般不确定需求。
This paper shows how standard arguments supporting the imposition of price caps break down in the presence of demand uncertainty. In particular, though in the deterministic case the introduction or lowering of a price cap (above marginal cost) results in increased production, increased total welfare, decreased prices, and increased consumer welfare, we show that all of the above comparative statics predictions fail for generic uncertain demand functions. For example, for price caps su ciently close to marginal cost, a decrease in the price cap always leads to a decrease in production and total welfare under certain mild conditions. Under stronger regularity assumptions, all of the monotone comparative statics predictions from the deterministic case also do not hold or a generic uncertain demand if we restrict attention to price caps in an arbitrary fixed interval (as long as the price caps are binding for some values in that interval).