{"schema_version":"GreyResearchGraph 1.0","study_id":"GSX:HH-001","node_count":19,"edge_count":25,"nodes":[{"id":"GSX:HH-001:C01","type":"claim","label":"For two Gauteng adults bringing home R30,000 and R20,000 a month, combining households at 25 rather than 35 leaves about R3.972 million more combined household wealth at 75 in the average scenario, in constant 2026 rand. The direct living-cost saving is about R1.059 million. The larger gap comes from investing that earlier saving and from avoiding expensive negative balances.","evidence_status":"modelled","href":"https://greyscienx.com/research/household-economics/economics-of-living-together/claims/C01"},{"id":"GSX:HH-001:A01","type":"assumption","label":"The household is two adults in Gauteng with take-home pay of R30,000 and R20,000 a month. The results are combined household wealth, not each person's legal ownership.","evidence_status":"modelled","href":"https://greyscienx.com/api/v1/research/economics-of-living-together"},{"id":"GSX:HH-001:A02","type":"assumption","label":"The Early couple combines adequate households at 25. The Later couple combines them at 35. From 35 onward the model gives both the same housing arrangement, income, expenses, shocks, and retirement assumptions.","evidence_status":"modelled","href":"https://greyscienx.com/api/v1/research/economics-of-living-together"},{"id":"GSX:HH-001:A03","type":"assumption","label":"In the average case, real salary growth and real living-cost growth are both 0.75% a year. The net real investment return is 3% a year after fees and tax drag. The initial monthly cohabitation dividend is R8,500.","evidence_status":"modelled","href":"https://greyscienx.com/api/v1/research/economics-of-living-together"},{"id":"GSX:HH-001:A04","type":"assumption","label":"The model invests the available surplus. It does not spend that surplus on a higher lifestyle.","evidence_status":"modelled","href":"https://greyscienx.com/api/v1/research/economics-of-living-together"},{"id":"GSX:HH-001:R01","type":"result","label":"In the average case, the Early household holds R3.972 million more combined wealth at 75 than the Later household, in constant 2026 rand.","evidence_status":"modelled","href":"https://greyscienx.com/api/v1/research/economics-of-living-together"},{"id":"GSX:HH-001:R02","type":"result","label":"In the average case, the Early household spends about R1.059 million less on living costs over the model. At 35, before the later years are financially identical, its lead is R1.188 million.","evidence_status":"modelled","href":"https://greyscienx.com/api/v1/research/economics-of-living-together"},{"id":"GSX:HH-001:C02","type":"claim","label":"Across the manuscript's three scenarios, earlier household combination still leaves the stronger position at 75. The lead is R11.287 million in the best case, R3.972 million in the average case, and R1.882 million in the worst case. In the worst case that lead only narrows two large funding gaps.","evidence_status":"modelled","href":"https://greyscienx.com/research/household-economics/economics-of-living-together/claims/C02"},{"id":"GSX:HH-001:A05","type":"assumption","label":"Both relationships remain intact through the simulation. Separation, custody, maintenance, and a second replacement home are not given a numeric cost.","evidence_status":"modelled","href":"https://greyscienx.com/api/v1/research/economics-of-living-together"},{"id":"GSX:HH-001:R03","type":"result","label":"At 75 the Early household's lead is R11.287 million in the best case and R1.882 million in the worst case. In the worst case both positions are large funding gaps: about -R16.346 million and -R18.228 million.","evidence_status":"modelled","href":"https://greyscienx.com/api/v1/research/economics-of-living-together"},{"id":"GSX:HH-001","type":"study","label":"The Economics of Living Together","evidence_status":"modelled","href":"https://greyscienx.com/research/household-economics/economics-of-living-together"},{"id":"GSX:HH","type":"series","label":"Household Economics","evidence_status":null,"href":"https://greyscienx.com/series/household-economics"},{"id":"GSX:HH-001:M01","type":"model","label":"Lifetime household-timing model","evidence_status":"modelled","href":"https://greyscienx.com/api/v1/research/economics-of-living-together"},{"id":"GSX:HH-001:PDF","type":"source","label":"The Economics of Living Together","evidence_status":null,"href":"https://greyscienx.com/research/household-economics/greyscienx-economics-of-living-together.pdf"},{"id":"GSX:TOPIC:cohabitation","type":"topic","label":"Cohabitation","evidence_status":null,"href":"https://greyscienx.com/topics/cohabitation"},{"id":"GSX:TOPIC:lifetime-wealth","type":"topic","label":"Lifetime wealth","evidence_status":null,"href":"https://greyscienx.com/topics/lifetime-wealth"},{"id":"GSX:TOPIC:housing","type":"topic","label":"Housing","evidence_status":null,"href":"https://greyscienx.com/topics/housing"},{"id":"GSX:TOPIC:south-africa","type":"topic","label":"South Africa","evidence_status":null,"href":"https://greyscienx.com/topics/south-africa"},{"id":"GSX:HH-002","type":"study","label":"The First Three Years Advantage","evidence_status":"modelled","href":"https://greyscienx.com/research/household-economics/the-first-three-years-advantage"}],"edges":[{"subject_id":"GSX:HH-001:C01","predicate":"depends_on","object_id":"GSX:HH-001:A01","note":"Registered dependency."},{"subject_id":"GSX:HH-001:C01","predicate":"depends_on","object_id":"GSX:HH-001:A02","note":"Registered dependency."},{"subject_id":"GSX:HH-001:C01","predicate":"depends_on","object_id":"GSX:HH-001:A03","note":"Registered dependency."},{"subject_id":"GSX:HH-001:C01","predicate":"depends_on","object_id":"GSX:HH-001:A04","note":"Registered dependency."},{"subject_id":"GSX:HH-001:C01","predicate":"derived_from","object_id":"GSX:HH-001:R01","note":"Registered result."},{"subject_id":"GSX:HH-001:C01","predicate":"derived_from","object_id":"GSX:HH-001:R02","note":"Registered result."},{"subject_id":"GSX:HH-001:C02","predicate":"depends_on","object_id":"GSX:HH-001:A01","note":"Registered dependency."},{"subject_id":"GSX:HH-001:C02","predicate":"depends_on","object_id":"GSX:HH-001:A02","note":"Registered dependency."},{"subject_id":"GSX:HH-001:C02","predicate":"depends_on","object_id":"GSX:HH-001:A04","note":"Registered dependency."},{"subject_id":"GSX:HH-001:C02","predicate":"depends_on","object_id":"GSX:HH-001:A05","note":"Registered dependency."},{"subject_id":"GSX:HH-001:C02","predicate":"derived_from","object_id":"GSX:HH-001:R01","note":"Registered result."},{"subject_id":"GSX:HH-001:C02","predicate":"derived_from","object_id":"GSX:HH-001:R03","note":"Registered result."},{"subject_id":"GSX:HH-001","predicate":"part_of","object_id":"GSX:HH","note":"Household Economics"},{"subject_id":"GSX:HH-001","predicate":"has_claim","object_id":"GSX:HH-001:C01","note":"Registered claim."},{"subject_id":"GSX:HH-001:C01","predicate":"generated_by","object_id":"GSX:HH-001:M01","note":"Lifetime household-timing model"},{"subject_id":"GSX:HH-001:C01","predicate":"supported_by","object_id":"GSX:HH-001:PDF","note":"Source registered on the conditional claim."},{"subject_id":"GSX:HH-001","predicate":"has_claim","object_id":"GSX:HH-001:C02","note":"Registered claim."},{"subject_id":"GSX:HH-001:C02","predicate":"generated_by","object_id":"GSX:HH-001:M01","note":"Lifetime household-timing model"},{"subject_id":"GSX:HH-001:C02","predicate":"supported_by","object_id":"GSX:HH-001:PDF","note":"Source registered on the conditional claim."},{"subject_id":"GSX:HH-001","predicate":"has_topic","object_id":"GSX:TOPIC:cohabitation","note":"Registered topic."},{"subject_id":"GSX:HH-001","predicate":"has_topic","object_id":"GSX:TOPIC:lifetime-wealth","note":"Registered topic."},{"subject_id":"GSX:HH-001","predicate":"has_topic","object_id":"GSX:TOPIC:housing","note":"Registered topic."},{"subject_id":"GSX:HH-001","predicate":"has_topic","object_id":"GSX:TOPIC:south-africa","note":"Registered topic."},{"subject_id":"GSX:HH-001","predicate":"related_to","object_id":"GSX:HH-002","note":"Household Economics"},{"subject_id":"GSX:HH-002","predicate":"related_to","object_id":"GSX:HH-001","note":"Household Economics"}]}