In the central build-out, South African-linked firms record US$264 billion of cumulative gross sales and about US$137 billion of domestic value added over twenty-five years.
Evidence status: Modelled. Sensitivity: high. Depends on GSX:AFR-003:A01, GSX:AFR-003:A02. The envelope is a constructed scenario, not an official infrastructure estimate, and it includes private buildings. The employment numbers are scale indicators, not forecasts. A 1.4 percent of GDP level effect is not a permanent 1.4 percentage-point addition to annual growth.
C01
Related questions
What industrial role does South Africa have in African urbanisation?
Which city-building goods could a South African factory system supply?
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Assumptions
Assumptions
These are the registered model assumptions. A result stays conditional on the ones a claim names.
A01Urban anchorThe demographic anchor is a rise from roughly 700 million urban residents to 1.4 billion by 2050. The manuscript attributes the trajectory to UN-Habitat and the United Nations, not to a GreyScienx population forecast.700 million additional urban residents
A02Contestable share and retentionAbout US$7.1 trillion of the central market is treated as contestable by external suppliers. The retention case keeps 52 percent of captured sales as South African value added.52 percent of captured sales retained
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Model
Model
The registered model statement. It is a scenario model, and the manuscript remains the full specification.
M01Urban build-out supplier modelThe model turns an additional 700 million urban residents into an all-in capital-formation envelope, removes intrinsically local spending, applies sector shares, and retains a stated fraction as South African value.GSX:AFR-003:M01
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Results
Results
Modelled scenario results. They are not forecasts.
R01264 billion constant 2024 US dollars of gross salesThe central scenario is US$17.9 trillion of all-in urban capital formation. Captured South African-linked gross sales are US$264 billion.Central build-out, 2026-2050
R02137 billion constant 2024 US dollars of domestic value addedDomestic value added is about US$137 billion over twenty-five years, US$5.5 billion a year on average, with an illustrative 65,000 direct jobs.Central case, 52 percent retention
Sensitivity
High · 1
Moderate · 1
Low · 0
Limitations
The envelope is a constructed scenario, not an official infrastructure estimate, and it includes private buildings. The employment numbers are scale indicators, not forecasts. A 1.4 percent of GDP level effect is not a permanent 1.4 percentage-point addition to annual growth.
Most urban spending is local. Housing is a large market and a smaller external-supplier opportunity. An unreliable domestic port, grid or rail system can erase the geographic advantage.
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Claims
Claims
Each claim names the assumptions it uses and the limitation that travels with it.
C01GSX:AFR-003:C01In the central build-out, South African-linked firms record US$264 billion of cumulative gross sales and about US$137 billion of domestic value added over twenty-five years.Modelled · high sensitivity
C02GSX:AFR-003:C02The supplier position in the manuscript is equipment, engineering, finance, standards and maintenance, with bulky production placed near demand. The basic-provision case is US$8.5 trillion and the convergence case is US$32.2 trillion.Modelled · moderate sensitivity
Sources and reproducibility
The PDF and complete Markdown source are both published.
Full manuscript: 7 203 words across 56 indexed headings. Source checksum: 6c18252eb3a1…. Code recorded: yes. Data recorded: yes. Environment recorded: no. Published files: 3. the published statement does not rely on a recorded random seed A public code repository is not published.
