The interlinkages of macroeconomics policy instruments, fuel prices and GDP growth: A case for Namibia

The Great Economic Balancing Act

Imagine the economy of a country not as a boring spreadsheet, but as a giant, complex video game where the player is the government. The goal? To keep the score (GDP growth) high while making sure every player on the team gets a fair share of the loot and doesn't starve. To do this, the government has a control panel full of levers and dials: interest rates (the "prime rate"), fuel costs, electricity usage, and how much money they spend on schools or farms. These are called macroeconomic policy instruments. Think of them like the steering wheel, accelerator, and brakes of a car. If you press the gas too hard without checking the fuel gauge, you might run out of juice; if you hit the brakes too hard, you might stall.

The big question this paper tackles is: How do these different levers actually talk to each other? In the real world, changing one thing (like the price of diesel) doesn't just affect that one thing; it ripples out to change how much food people can grow, how many jobs are available, and how fast the whole country grows. This is especially tricky for developing nations like Namibia, where the gap between the rich and poor is huge, and the government is trying to fix things like hunger and unemployment while the global economy is shaking. The authors want to know if the Namibian government is pulling the right levers in the right order, or if they are accidentally pressing the brake while trying to speed up.

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The Namibian Puzzle: When the Fuel Gauge Spikes

In this study, two researchers, Kennedy Kalundu and Helmke Sartorius von Bach, decided to play detective with Namibia's economy. They didn't just guess; they built a sophisticated digital model—a "simultaneous equation" machine—that looked at quarterly data (three-month chunks) from 2000 to 2025. Think of this model as a super-accurate weather forecast for the economy, but instead of rain and wind, it tracks things like diesel prices, electricity usage, and how much the government spends on education.

Here is the big reveal from their simulation: The current setup is a bit of a mess.

The paper finds that Namibia is trying to balance political goals with economic reality, but the pieces don't quite fit. The most striking discovery is about fuel. The researchers found that for every 1% increase in the price of diesel, the country's GDP growth drops by 0.554%. That's a heavy price to pay. It's like if every time you bought a slightly more expensive ticket to the movies, your entire family's allowance for the month got cut in half. This volatility in fuel prices isn't just annoying; it's costing the country about 1.293 billion dollars in lost national income and messing up jobs and food production.

But it's not just about fuel. The authors argue that the government has been pulling the wrong levers in the wrong places.

• The Agriculture Trap: Namibia has a huge agricultural sector that supports most of its rural population, yet the government hasn't been spending enough to make it efficient. The paper suggests that if the country had followed the "Malabo Declaration" (a plan to spend 10% of the national budget on agriculture), the agricultural GDP could have jumped by 8.5%. Instead, the budget is often misaligned, leaving the primary sector (farming) underfunded while other areas get too much attention.
• The Education Lifeline: On a brighter note, the model shows that money spent on secondary education is a golden ticket. Investing in schools helps build "human capital"—basically, smarter, more skilled workers—which accelerates development in the long run. It's like planting a tree today that will give shade and fruit decades later.
• The Debt Danger: The paper also warns about public debt. It suggests that if public debt goes up by 10%, GDP growth could fall by 2.65%. The authors caution that borrowing money should only be an emergency move, not a regular habit, especially if the debt gets too high compared to the country's income.

What the Model Says (and What It Doesn't)

The researchers used a method called Generalised Methods of Moments (GMM), which is a fancy way of saying they used a very strict statistical test to make sure their results weren't just luck. They checked their work with diagnostic tests (like the Durbin-Watson test) and found their model fits the data really well, with accuracy scores (Adjusted-R-squared) as high as 97% for some parts. This means they are quite confident in their numbers.

However, the paper is careful not to promise a magic cure. It suggests and indicates rather than proves absolute truths. For instance, it points out that the current approach to setting fuel prices and managing the budget is "incoherent" and "mismatched." It argues that the government's short-term fixes have created long-term problems, like high unemployment (ranging between 37% and 52%) and persistent poverty.

The authors explicitly rule out the idea that just throwing money at social programs without fixing the primary industries (like farming) will work. They also note that simply keeping inflation low isn't enough to boost growth; in fact, their model shows that trying to keep inflation low didn't significantly improve GDP, and sometimes the relationship is even negative.

The Takeaway: A Call for Smarter Steering

So, what's the lesson for Namibia? The paper concludes that the country needs to stop using a "one-size-fits-all" approach and start using tools that actually work for its specific situation. The authors recommend:

1. Focus on the basics: Prioritize the primary and secondary sectors (farming and manufacturing) to boost productivity.
2. Fix the fuel game: Stabilize fuel prices so they don't crash the economy every time the global oil market sneezes.
3. Invest in people: Keep pouring money into education to build a skilled workforce.
4. Trust the people: Make decisions based on public welfare and trust, ensuring that natural resources are used to help everyone, not just a few.

In the end, the paper suggests that if Namibia can align its policy instruments—like the prime rate, fuel prices, and education budget—with its actual economic needs, it can move from a state of "incoherent" growth to a stable, prosperous future. It's a reminder that in the game of economics, you can't just hit the gas; you have to know exactly which pedal to press and when.