How drought in Central America is pushing up the cost of living in Australia
- Written by: Stephen Bartos, Professor of Economics, University of Canberra
What does a drought in Central America have to do with Australia’s cost of living? Quite a lot, if the drought affects the Panama Canal.
The 425 square kilometre Gatun Lake was built in the early 1900s to store water for the Panama Canal. Water is needed to float ships so they can navigate the canal. Now drought has severely affected the lake’s water levels.
Because of this the Panama Canal Authority has had to cut the number of ships using it. Hundreds of ships have queued up to wait their turn.
In June, Newsweek magazine[1] drew attention to a Canal Authority graph showing the water levels in the lake dropping to unprecedented lows.
About 130 ships, more than twice the number normally handled by the Panama Canal wait to cross the waterway.
AAP[6]
My own report[7] last year on food supply chains warned about the impact of global warming and the likelihood that disruptions in supply chains would lead to increased food prices.
What has the Panama Canal got to do with Australia?
You may wonder how something as far away as the Panama Canal can affect Australian retail costs. A good question. The answer is that today’s supply chains are global and interconnected.
A 2021 study[8] by the Productivity Commission on supply chains noted they are complex. It said
modern supply chains often rely on inputs from across the globe and can consist of thousands of firms. The Dell supply chain, for example, was estimated to consist of over 7,000 suppliers in 2019.
Yes Panama, at 1,000 kilometres north of the equator, is in the northern hemisphere. For trading, it is more important to America and northern Asia.
But Australia will still be affected by the disruption. Our supply chains are connected. Ripple spread through supply chains through prices. Even if products we buy or sell are not physically in the affected part of a supply chain, when their prices increase ours do too.
That is because buyers and sellers can shift goods depending on market conditions. Buyers move things to where the prices are cheaper, sellers to where the prices are higher. If a firm sells in one market, that affects a seller in the next market.
Shortages are reflected in prices
Each firm’s shortages or surpluses have an impact on prices. They in turn trade with other markets in different regions. Knock on effects spread across the globe.
OpenStreetMaps, CC BY[9]
Australia is an island, highly reliant on shipping for trade – both imports and exports. Imports include not only finished goods but also many of the inputs to our industries, including packaging and parts.
Let’s consider how delays at the Panama Canal affect these. If a spare part for a manufacturer in the US or Japan is delayed by the shipping queue, the buyer will go to another supplier to avoid holding up their production line. Generally, this means paying a higher price.
If those suppliers sell to Australia, we end up paying higher prices too.
Sometimes the costs of a disruption filter into markets slowly, especially for items that are not traded very often and have few substitutes.
Sometimes it is fast for the opposite reason. Eventually though the costs of delays catch up to everyone in both the direct and flow on supply chains.
