Throughout its history, several attempts have been made to map the structure and subfields of agricultural economics; however, these attempts either rely on the experience of distinguished scholars or require processing a massive amount of textual data. This paper investigates the structural dynamics of agricultural economics, focusing on the changing frequency of different subfields and the diversification of the discipline over time and on the differences between European and non-European scholars. A quantitative text analysis is carried out on abstracts from the major agricultural economics journals in the Journal Citation Reports category ‘Agricultural Economics and Policy’. The topics identified are consistent with findings from traditional studies, but their importance differs between the two areas. However, a convergence process has been observed in the last years.

中文翻译：

---

哪些主题建模可以显示农业经济学的发展：来自期刊引文报告类别顶级期刊的证据

纵观其历史，人们曾多次尝试绘制农业经济学的结构和子领域。然而，这些尝试要么依赖于杰出学者的经验，要么需要处理大量的文本数据。本文研究了农业经济学的结构动态，重点关注不同子领域的变化频率和学科随时间的多样化以及欧洲和非欧洲学者之间的差异。对期刊引文报告类别“农业经济学和政策”中主要农业经济学期刊的摘要进行定量文本分析。确定的主题与传统研究的结果一致，但它们在两个领域之间的重要性不同。然而，