This paper studies the determinants of economies of scope and quantifies their impact on the extensive and intensive product margins in retail. We use a framework based on a multiproduct technology to model stores’ incentives to expand product variety. Using novel Swedish data on product categories and stores, we find that high-productivity stores offer more product categories and sell more products of all categories. Stores with high-demand shocks specialize in fewer product categories and sell more products of top-selling categories. Policy simulations of regional programs that target the determinants of economies of scope show that investment subsidies and mentoring support for low-productivity stores increase the number of product categories and sales per product category, especially benefiting stores in rural markets.

本文研究了范围经济的决定因素，并量化了它们对零售业广泛而集约化的产品利润的影响。我们使用基于多产品技术的框架来建模商店扩大产品种类的动机。使用有关产品类别和商店的新颖瑞典数据，我们发现高效率商店提供更多产品类别并销售更多所有类别的产品。需求强烈的商店专门销售较少的商品类别，并销售更多的畅销商品。针对范围经济决定因素的区域计划的政策模拟表明，对低生产率商店的投资补贴和指导支持增加了产品类别的数量和每种产品类别的销售额，特别是使农村市场的商店受益。