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英文文献：The Bigger the Stickier: Asymmetric Adjustment to Negative Demand Shocks-粘性越大:对负需求冲击的不对称调整
英文文献作者：Javier Tasso
英文文献摘要：
By extending a previous model, this article studies the response to unan- ticipated demand shocks in a simultaneous competition duopoly model, where adjustment is simultaneous as well and it is characterized by a sin- gle choice to adjust or not previous plans. In line with former analyses, responses are asymmetric in two dimensions: firms always react to positive demand shocks while they may not react to negative ones and, when de- mand shocks are negative and small in magnitude, only a single firm adjust its previous decisions. Since in the baseline model firms are identical, it is not determined which firm will adjust its decisions. By allowing for di?erent marginal costs, there are medium sized negative shocks for which only the firm with higher marginal costs adjusts its price or quantities. This result suggest that the bigger firm is less willing to modify its plans after the shock and, as a consequence of this asymmetric response, it increases its market share.
本文通过对已有模型的扩展，研究了同时竞争的双头垄断模型中，调整也是同时进行的，且具有调整或不调整原有计划的错误选择的需求冲击响应。根据之前的分析，反应在两个维度上是不对称的:企业总是对积极的需求冲击做出反应，而对消极的需求冲击可能不会做出反应;当需求冲击是负面的且规模较小时，只有一个企业会调整其先前的决策。因为在基线模型中公司是相同的，所以不能确定哪个公司会调整其决策。通过允许对di?不同边际成本,有中等大小的负面冲击,只有该公司更高的边际成本调整价格或数量。这一结果表明，较大的公司不太愿意在冲击后修改其计划，由于这种不对称的反应，它增加了市场份额。
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