{"id":"GSX:POP-009:A01","local_id":"A01","name":"Hypothetical Gauteng-scale city-region","statement":"The model follows a hypothetical region from 2026 to 2076. It starts with 1.2 million people, about 420,000 households, and 430,000 habitable homes. The zones are stylised. They are not labelled real Gauteng neighbourhoods.","value":"1.2","unit":"million people in 2026","type":"model assumption","provenance":"Manuscript central scenario","evidence_strength":"illustrative","sensitivity":"high","alternatives":["A different household-size path","Faster or slower population decline"],"href":"https://greyscienx.com/research/population-futures/how-to-shrink-a-country-without-breaking-it/assumptions/A01"}