Entry regulations with implementation lag: Evidence from convenience store markets in Korea
研究韩国首尔郡一项旨在保护现有便利店的新规，发现因政策宣布与实施之间存在时间滞后，潜在店主提前行动，反而导致现有店铺生存概率下降，提醒政策制定者注意滞后效应和市场主体适应性行为。
Seocho County in Korea attempted to advance the interests of incumbent businesses by weakening competition in the convenience store market. To this end, it created a regulation impeding the opening of new convenience stores. Although this regulation intensified proximity restrictions between stores, our findings reveal that the announcement of legislation condemned incumbent businesses to unfavorable survival probabilities. We provided supporting evidence that so-called implementation lags—time lags between the announcement and implementation of policies—and adaptive behaviors of potential store owners may have caused unintended consequences. Our findings imply that policymakers should consider implementation lag and the adaptive behaviors of economic agents.