GCRI · 贸易与战略资源
方法与不确定性
The methods Trade and Strategic Resources relies on: their equations and assumptions, the data they need, how they are validated and the limits of what they can show.
The workspace for methods and uncertainty.
证据登记册
Trade and resources · Methods and uncertainty · Example interface, not a record
指标
单位 · 频率 · 标签
| 通行时间 | 天 | 每周 | 观测 | SP-4434 |
| Supplier concentration (HHI) | 指数 | 每季度 | 派生 | SP-2755 |
| 清单覆盖率 | 天 | 每周 | 已报告 | SP-9473 |
| Freight rate index | 指数 | 每周 | 观测 | SP-7356 |
| Share of supply from top source | of volume | 每季度 | 派生 | SP-8892 |
来源护照
- 来源
- Customs trade flows
- 许可协议
- 开放 · 署名
- 管理者
- Port authority
- 覆盖范围
- 72 pct of places
- 已知局限
- 高地稀疏
按地点的覆盖情况
Trade and Strategic Resources · Evidence register. 证据登记册:示例名称与示意数值,不是记录。
使用中的方法。
Each method, its role in this field and how it is checked.
- 网络科学Role hereNetwork science represents trade and supply as networks of countries, firms and routes.Checks appliedRe-export correction; Sensitivity to substitution; Event validation
- 优化Role hereOptimisation and operations research decide how to route, stock and diversify supply under cost and risk.Checks appliedOut-of-sample scenarios; Operator review; Trade-off reporting
- 计量经济学Role hereEconometrics estimates relationships in trade and price data from observed history.Checks appliedPre-trend tests; Robustness to specification; Structural break tests
- GeospatialRole hereGeospatial information systems locate mines, fabs, ports, routes and producing regions, and overlay them with hazards, conflict and environmental data.Checks appliedLocation verification; Hazard map resolution; Attribution uncertainty
- Materials chemistryRole hereMaterials science and chemistry explain which materials a technology needs, how they are refined, and which can be recycled or substituted.Checks appliedMass balance; Technology readiness; Expert review
- 城市交通工程Role hereTransport engineering designs and operates the ports, terminals, corridors and freight networks that carry trade.Checks appliedCapacity validation; Model calibration; Hazard exposure review
流程如何运行。
Process explorer · Process
Methods and uncertainty: PRISMA 2020 review reporting
10 steps·4 个阶段
流程
Methods and uncertainty: PRISMA 2020 review reporting
PRISMA 2020 是系统综述的报告指南;各步骤依循其核查清单,而非强制顺序,且没有任何 Nexus 文件采纳它。
01 Plan
- 01注册与协议记录 · 审查团队该指南要求说明注册信息、方案的获取方式以及任何修订。
- 02资格标准记录 · 审查团队该指南要求说明纳入与排除标准以及研究的分组方式。
02 查找与遴选
- 03检索:来源与策略步骤 · 审查团队该指南要求说明信息来源与完整的检索策略。它并不规定使用哪些来源。
- 04研究的遴选步骤 · 审查团队该指南要求说明如何判定研究符合纳入条件,包括有多少名审查人进行筛选。它并不规定审查人数量。
- 05流程图记录流程图显示检索到的记录数量、纳入的研究数量以及排除的理由。
03 分析
- 06数据收集步骤 · 审查团队该指南要求说明如何从报告中收集数据以及寻求了哪些数据项。
- 07偏倚风险步骤 · 审查团队该指南要求说明评估偏倚风险所使用的方法与工具。
- 08综合模型 · 审查团队该指南要求说明效应量指标与综合方法。它并不规定必须进行荟萃分析。
- 09证据的确定性步骤 · 审查团队该指南要求说明评估确定性所用的方法,并按结局报告结果。它并未指定分级量表。
04 报告
- 10审查报告记录该指南帮助作者报告开展综述的原因、所做的工作以及所得的发现。
报告Outline of an externally published reporting guideline, not a Nexus process and not a record of operation. PRISMA 2020 mainly covers reviews of intervention effects. No Nexus page names it. Every programme is at service level R0.
Where uncertainty in supply chain analysis comes from, and how it is shown.
| 来源 | Why it matters here | How it is reported |
|---|---|---|
| Firm-level links | Customs data stop at the border; tiers below are invisible | Concentration at product level; firm links labelled when inferred |
| Inventories | Buffer stocks are rarely disclosed | Scenario ranges |
| Substitution | Elasticities for critical inputs are poorly known | 敏感性分析 |
| 政策 | Export measures can change overnight | 政策情景 |
Concentration indices are reported by stage of the chain and by measure (volume, value).
如何报告不确定性。
- 01
说明假设
每项分析都列出其假设及其所依赖的数据。
- 02
尽可能量化
在报告中心估计值的同时报告区间与置信度。
- 03
验证与比较
模型会对照观测数据进行核查,并在可能时与其他模型进行对照。
- 04
发布限制
分析无法说明的内容与其能够说明的内容并列陈述。
Where this page’s references lead.
阅读本页时所对照的机构和文件。状态和版本会变化;每个链接都指向发布机构。
问题与解答。
方法是开放的吗?
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