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智库报告

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5金币 Rand兰德：2026年估算工作残疾的挑战及其对退伍军人事务残疾补偿的影响报告（英文版）.PDF

chairman Luttrell, Ranking Member McGarvey, and members of the committee, thankyou for your invitation to testify. My name is Dr. Philip Armour. I am a senioreconomist at RAND,a nonprofit, nonpartisan research organization,where I'm also thedi...

内容提供方：外唐用户 | 2026-01-23 发布 | 215.46KB | 10 页
5金币 Rand兰德：美国数学教育者调查-2025年技术文件和调查结果报告（英文版）.PDF

U.S. students have lost significant learning in mathematics and other subjects since the start of the coronavirus disease 2019 (COVID-19) pandemic in early 2020. The 2022 National Assessment of Educational Progress mathematics scores for students ...

内容提供方：外唐用户 | 2026-01-23 发布 | 257.03KB | 15 页
8金币 Rand兰德：2026年以成绩较低和较高学生为主的班级中的中学数学教学-美国教师小组的见解报告（英文版）.PDF

Most secondary mathematics teachers that we interviewed described school policies for assigning students to mathematics courses primarily based on assessment or course-grade data. ■ Supplementing or modifying curriculum is common practice, but tea...

内容提供方：外唐用户 | 2026-01-23 发布 | 421.03KB | 36 页
5金币 Rand兰德：2026年中美人工智能市场竞争-大型语言模型的全球使用模式分析报告（英文版）.PDF

the authors analyze global large language model (LLM) adoption patterns, with a focus on the competitive dynamics between the United States and China. Using website traffic data across 135 countries from April 2024 through May 2025, they tracked s...

内容提供方：外唐用户 | 2026-01-23 发布 | 2.21MB | 29 页
5金币联合国贸发会议：2026年全球贸易更新报告（1月版）（英文版）.PDF

Global trade enters 2026 under mounting pressure from slower growth, geopolitical fragmentation, accelerating digital and green transitions and tighter national regulations. Together, these forces are reshaping trade flows, investment decisions and g...

内容提供方：外唐用户 | 2026-01-23 发布 | 1.79MB | 22 页
10金币联合国贸易发展委员会：2025年数字经济中的国际投资：政策制定者的工具包（英文版）.PDF

The digital economy has become a major driver of innovation and global growth. It’s expected to generate more than two thirds of new value creation over the next decade, expanding at an annual rate of 10% to 12%.The 内容提供方：外唐用户 | 2026-01-23 发布 | 4.04MB | 71 页