Access to electricity — measured by the share of individuals who use electricity as their main energy source — has significantly improved in lower-income countries in recent decades. Thanks to large-scale rural electrification and infrastructure development programmes, 90% of the population in these countries had access by 2021, up from about 74% at the turn of the century.
In many of these countries, however, electricity supply is often unreliable. Generating capacity is inadequate, there’s not enough investment in infrastructure and energy prices are high. Consequently, outages are frequent and long-lasting. By forcing households and firms to use alternatives, such as diesel generators and back-up batteries, these outages raise the costs of energy, thus limiting the benefits of access. Those costs come in the form of direct expenses for households and firms and broader social impacts.
Power outages have long been identified as a major constraint to economic development. Many studies document their negative effects on economic growth, productivity and sales. It is unsurprising that people are willing to pay a relatively large amount for reliable power.
Because of those negative effects, it’s likely that outages have an impact on the labour market too. This is of particular interest in high unemployment contexts, such as South Africa, where creating decent jobs is key to alleviating poverty. However, evidence on these effects is scarce.
We analysed the labour market effects of scheduled electricity outages in South Africa — referred to as load-shedding — in a recently released paper.
We found power outages have had negative effects on employment as well as working hours and monthly earnings among those who remained employed. Effects on employment have been larger than effects on working hours or earnings. This highlights the threat that load-shedding poses to job preservation and job-creation efforts.
These effects were not, however, the same for all firms. Workers in the energy-intensive manufacturing industry appear particularly vulnerable to losing their jobs. Also, small and large companies responded differently. Small firms tended to favour reducing working hours rather than introducing layoffs.
Effects varied by load-shedding intensity. Low levels of load-shedding don’t affect the labour market strongly but high levels did.
Measuring the impact
South Africa boasts almost universal access to electricity but has been subjected to power cuts for more than 15 years since the end of 2007.
Load-shedding is mainly a consequence of frequent breakdowns at Eskom. This is due to a combination of poor long-term planning, a lack of financial resources, rampant state capture and corruption and ageing coal-fired power stations — 80% of which have passed their midlife point.
These outages have become more frequent and severe in recent years. In 2023 — the worst year on record — load-shedding was in place for 289 complete days.
Several studies have found power outages reduce economic growth. But to our knowledge there has been no empirical evidence of their labour market effects until now.
We modelled these labour market effects using more than 15 years’ worth of nationally representative labour force survey data, covering nearly three-million people. We merged this with macroeconomic data and high-frequency electricity data from 2008 to 2023.
We considered impacts in three ways.
First, in a binary sense, which compared labour market outcomes during periods of load-shedding to outcomes when there was no load-shedding.
Second, in a continuous sense, to account for differences in load-shedding intensity over time, as measured in MW of unmet demand.
Third, because load-shedding in reality is implemented in “stages”, we analysed differences in effects between different load-shedding stages. For example, stage 1 refers to up to 1,000MW of unmet demand and stage 6 up to 6,000MW.
We focused on effects on employment, working hours, hourly wages and monthly earnings. We also considered how effects varied across firms of different sizes and in different industries.
We adjusted all our models to ensure the measured impacts were not driven by other factors. These included labour market dynamics during the Covid-19 pandemic, seasonality or changes in macroeconomic conditions relating to GDP, the interest rate, exchange rates and investment.
The effects — large and small
We found load-shedding was significantly and negatively associated with employment, working hours and monthly earnings.
On average, periods of load-shedding were associated with a 2.6% lower chance of being employed, 1.3% fewer working hours per week (equal to about half an hour) and 1.7% lower real monthly earnings. These are large effects. We did not, however, find evidence of a relationship with hourly wages. This suggests the monthly earning reductions were driven by fewer working hours.
Low levels of load-shedding did not have these associations, but they were markedly worse with higher levels.
We didn’t find evidence of negative associations for stages 1 and 2 load-shedding, but from stage 3 upwards the impact became evident and grew stronger. For example, stage 3 was associated with 1.9% lower employment, compared with 3.6% for stages 4 and 5 and almost 6% for stage 6.
Not all firms were affected equally. Manufacturing — an energy-intensive industry — was worst off by far. We found load-shedding was associated with nearly 17% lower manufacturing employment, about 6.5 times larger than the average of all industries.
In most industries, our model suggested working hours were cut when power was cut.
Workers in large firms were vulnerable to all outcomes. In contrast, those in small firms were only vulnerable to reductions in working hours but not to job losses or wage cuts. One might expect larger firms to be less vulnerable as they would have more resources to pay for alternative energy sources. While that’s probably true, large firms are more likely to operate in energy-intensive sectors.
Our analysis suggests small firms have tended to reduce working hours rather than laying off staff, an outcome which is not unique to South Africa.
What needs to be done
These results highlight the negative effects of load-shedding on the real economy. From a policymaking perspective, the goal must be to reduce the frequency and intensity of the outages and ultimately eliminate them.
Recent events are encouraging. Efforts by the national utility have resulted in fewer breakdowns and improved generation capacity. In addition, deregulation and tax incentives appear to have increased demand from households and firms for alternative energy sources such as solar.
Supply is expected to remain constrained in the medium-term, however.
Longer-term policy decisions revolve around moving faster towards renewable energy sources, encouraging private investment and, overall, building a more resilient and sustainable energy system.
About the authors:
Haroon Bhorat is professor of economics and director of the Development Policy Research Unit, University of Cape Town
Timothy Köhler is a junior research fellow and PhD candidate, Development Policy Research Unit, School of Economics, University of Cape Town
— This article was first published in The Conversation
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