Climate shocks, labour market dynamics and inequality in South Africa: Evidence from administrative data tax

This paper examines the impact of temperature shocks on individual earnings and income inequality in South Africa. We leverage high-resolution satellite temperature data, merged with administrative tax records from the South African National Treasury and UNU-WIDER. Data from 2009 to 2022 shows that temperature shocks significantly reduce income, with a one-standard-deviation increase in average temperature associated with a 1 per cent decline in earnings and a 1.3 per cent decline in total income. However, we observe no statistically significant effects on income inequality. Temperature projections from the most recent climate models of the Coupled Model Intercomparison Project (CMIP6) are used to simulate the impact of global warming on income in the short, medium, and long term. By 2100, income is projected to decline by 5 per cent without mitigation and adaptation strategies, relative to a ‘best case’ scenario characterized by widespread adoption of renewable energy and climate change mitigation.