AI 中文总结
本文回顾政策选择研究设计的理论进展，构建通用框架、提出两个导航图表，还介绍一款可生成表格和图的R包，为应用研究者指导设计与传达政策建议提供新工具。
AI 中文摘要
经济学应用研究本质上受广泛的规范性目标驱动，但研究者应如何开展工作以生成支持这些目标的证据尚不明确。本文回顾了政策选择研究设计的最新理论进展，为应用研究者提供指导设计选择、传达政策建议的新工具。首先，聚焦计量经济学的理论贡献，采用统一符号和叙述构建涵盖所有回顾情境与结果的通用框架；其次，提出两个图表，应用研究者可从具体场景出发，借助这些图表梳理理论文献，做出合理的设计选择；最后，介绍一款新的R包，该包可生成一张表格和两张图，应用研究者可将其插入“政策含义”部分，为研究得出的不同政策建议的表现提供证据，发展经济学的一个实例说明了此类工具的应用。
英文摘要
Applied research in economics is intrinsically motivated by broad normative objectives. However, it is not obvious how a researcher should direct their efforts to produce evidence toward such objectives. This paper reviews recent theoretical developments on research design for policy choice and provides new tools applied researchers can use to guide their design choices and communicate their policy recommendations. First, I focus on theoretical contributions in econometrics and provide a general framework that nests all the contexts and results reviewed using a coherent notation and narrative. Then, I present two diagrams applied researchers can use to navigate the theoretical literature starting from concrete scenarios to make thoughtful design choices. Finally, I introduce a new R package that produces one table and two figures applied researchers can plug in their `policy implications' section to provide evidence on the performance of different policy recommendations coming out of their study. The use of such tools is illustrated with an example in development economics.
