Drivers of unconditional income convergence
将经济增长分解为技术效率变化、技术进步和资本积累，分析近几十年各国无条件收入趋同的驱动因素，发现技术效率提升和资本积累是主因，发展中国家在1995-2019年趋同期效率提升更快。
We decompose economic growth into technical efficiency change, technological change, and capital accumulation to analyze the drivers of unconditional income convergence across countries observed in recent decades. Our analysis suggests that technical efficiency improvement and capital accumulation are the main drivers of the observed unconditional convergence. Specifically, developing countries experienced faster efficiency improvement than developed countries in the period of unconditional convergence (1995-2019), which was not the case in the preceding period characterized by the lack of income convergence (1970-1995).