What Happens When a Retailer Drops a Product Category? Investigating the Consequences of Ending Tobacco Sales
研究零售商从产品组合中完全移除一个品类（如烟草）后，对行业内竞争对手业绩产生的跨品类溢出效应。
The paper measures the cross-category spillover effects of a retailer changing its assortment at the extensive margin (by dropping an entire category from its portfolio) on the outcomes for its rivals in the industry.