This paper discusses a family of methods grounded in the doubly constrained gravity model (DCGM) for the estimation of product‐specific origin–destination matrices of interregional trade. We argue that several estimation procedures documented in the literature, although outwardly unrelated, can be conceptualized as applications of the DCGM framework. We show that DCGM estimation requires less restrictive assumptions and fewer data than commonly thought. We demonstrate that, in ideal conditions, the unknown trade flows can be recovered exactly through a standard application of the RAS algorithm. Finally, we examine how a DCGM estimator might fare in applications using Monte Carlo techniques and give an example of its use with real‐world data.

中文翻译：

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用于区域间贸易估计的双约束引力模型

本文讨论了基于双重约束重力模型（DCGM）的一系列方法，用于估计区域间贸易的特定于产品的原产地-目的地矩阵。我们认为，文献中记载的几种估算程序尽管在外观上不相关，但可以作为DCGM框架的应用进行概念化。我们表明，DCGM估计比通常认为的需要更少的限制性假设和更少的数据。我们证明，在理想条件下，可以通过RAS算法的标准应用来准确地恢复未知的贸易流。最后，我们研究了DCGM估计器在使用蒙特卡洛技术的应用程序中可能会如何发挥作用，并给出了其与实际数据结合使用的示例。