Identifying aggregate supply and demand shocks in South Africa
Stellenbosch Working Paper Series No. WP11/2007Publication date: 2007
Author(s):
[protected email address] (Bureau of Economic Research, Stellenbosch University)
Federico Sturzenegger (Kennedy School of Government, Harvard University)
This paper uses a structural VAR methodology to identify aggregate demand and supply shocks to real output for the South African economy. Demand shocks, in turn, are separated into fiscal and monetary shocks. The model is estimated with quarterly data over two overlapping samples: 1960Q2-2006Q4 and 1983Q4-2006Q4. The identified (structural) shocks were used in a historical decomposition to split output into a measure of potential output (resulting from the evolution of supply shocks) and a measure of the business cycle (the gap between actual and potential output). This measure of potential output suggests a significant decline relative to trend in the years prior to the political transition of 1994 and a swift reversal thereafter. The paper presents evidence from three sources to support its identification of aggregate supply and demand shocks. These sources are the following: theory consistent impulse response functions; a close match between the implied measure of the business cycle and independent information about the South African business cycle; and a demonstration of the close match between the identified series of aggregate supply shocks and important historical events in the decades prior to and following 1994 that have been identified by economic historians as important shocks to the South African economy.
JEL Classification:C25; C41; E32
Keywords:South Africa, aggregate supply, aggregate demand, monetary policy, fiscal policy, potential output, long-run restrictions
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16 May 2025 Trade truce lifts markets, SA braces for winter load-shedding and budget reckoningThis week, data showed that South Africa’s unemployment rate rose in 2025Q1, with net job losses compared to 2024Q4. Meanwhile, mining output improved in March but declined overall for the quarter. In the US, inflation eased to a four-year low, while Germany’s economic sentiment rebounded sharply. The UK economy posted impressive growth in Q1; however,...
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Upcoming Seminars
Monday 26 May 202512:00-13:00
Prof Simon Franklin: Queen Mary University In London
Topic: "No Place Like Home? The Causal Effect of Housing Clearances in Central Addis Ababa"
12:00-13:00
Dr Dawie van Lill: South African Reserve Bank & Stellenbosch University
Topic: "TBC"
12:00-13:00
Prof Hylton Hollander: University Of Cape Town
Topic: "TBC"
BER Weekly
16 May 2025 Trade truce lifts markets, SA braces for winter load-shedding and budget reckoningThis week, data showed that South Africa’s unemployment rate rose in 2025Q1, with net job losses compared to 2024Q4. Meanwhile, mining output improved in March but declined overall for the quarter. In the US, inflation eased to a four-year low, while Germany’s economic sentiment rebounded sharply. The UK economy posted impressive growth in Q1; however,...
Read the full issue