In this paper, employing transaction-level data for Russian imports, we explore the role of multi-product shipments in explaining shipping patterns across countries. In our data, an average shipment includes five different products. We document that firms from higher-income countries on average include a larger number of different products into a single shipment and have a larger number of shipments per period with a lower average quantity and value. We then propose a mechanism that reconciles both facts. Specifically, multi-product shipments allow firms to split fixed costs per shipment across many products and, therefore, reduce total shipment costs. As a result, higher-income countries tend to have lower fixed costs per shipment. Finally, we construct a simple partial equilibrium model that enables us to quantify the potential increases in trade volumes and welfare created by the multi-product shipment option.

中文翻译：

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出口成本和多产品运输*

在本文中，我们利用俄罗斯进口的交易级数据，探讨了多产品运输在解释跨国运输模式中的作用。在我们的数据中，平均每批货物包括五种不同的产品。我们记录到，来自高收入国家的公司平均将更多不同的产品包含在一次发货中，并且每个时期的发货数量更多，平均数量和价值较低。然后，我们提出了一种调和这两个事实的机制。具体来说，多产品运输允许公司将每次运输的固定成本分摊到许多产品中，从而降低总运输成本。因此，高收入国家的每批货物固定成本往往较低。最后，