Little previous research has explored what drives the diversification of national food supplies (DFS) across countries and regions. We construct and analyse a cross-country dataset linking a simple DFS indicator - the share of calories supplied by nonstaple foods - with structural transformation and agroecological indicators. Panel econometric models show that several indicators of structural transformation (economic growth, urbanization and demographic change) are strong predictors of diversification within countries, yet time-invariant agroecological factors are also significantly associated with diversification, which appears to explain why some countries have exceptionally low or high DFS relative to their level of economic development. We discuss the implications of these findings for food and nutrition strategies.

此前很少有研究探讨是什么推动了不同国家和地区的国家粮食供应（DFS）的多样化。我们构建并分析了一个跨国数据集，将简单的 DFS 指标（副食提供的热量份额）与结构转型和农业生态指标联系起来。面板计量经济模型显示，结构转型的若干指标（经济增长、城市化和人口变化）是国家内部多样化的有力预测因素，但时不变的农业生态因素也与多样化显着相关，这似乎可以解释为什么一些国家的农业生态度特别低。或相对于其经济发展水平的高 DFS。我们讨论这些发现对食品和营养策略的影响。