Investigating Macroeconomics: The Terms of Trade Notes

The Terms of Trade (ToT) measures the value of imports a country can purchase for a given volume of exports, reflecting relative price movements.
It identifies the purchasing power of export earnings concerning imported goods and services.
The Terms of Trade Index is calculated using the following formula: $\text{Terms of Trade Index} = \frac{\text{Export Price Index (XPI)}}{\text{Import Price Index (MPI)}} \times 100$
Favourable Movement: A rise in the index (export prices increase relative to import prices), allowing more imports for the same export volume.
Unfavourable Movement: A fall in the index (import prices increase relative to export prices), reducing the volume of imports obtainable.
Indices are constructed relative to a base year value of $100$ .

Trade Composition: Australia is a price taker. Commodity exports (e.g., iron ore, coal, LNG, gold, and lithium) account for approximately $75\%$ of total exports.
Commodity Prices: This is the primary determinant of Australia's XPI. The Reserve Bank of Australia (RBA) maintains a commodity price index where the mining sector holds a $90\%$ weight.
Market Elasticity: Commodity markets have relatively inelastic supply and demand, leading to large price fluctuations from small shifts in global demand (e.g., China's economic expansion) or supply (e.g., global droughts affecting wheat).
Import Price Index (MPI): Influenced by manufactured goods (motor vehicles, ICT) and energy costs (refined petroleum). Global supply chain disruptions can increase MPI, while technological advances tend to reduce costs over time.
Exchange Rate: Changes in the Australian dollar (AUD) have minimal net impact on the ToT because both export and import prices are adjusted in AUD terms, and many contracts are in US dollars.

Favourable Movement Effects: * Acts as a positive demand shock increasing real GDP and national income. * Stimulates employment (especially in mining) and can increase inflation. * Boosts government tax revenue and mining royalties. * Leads to an appreciation of the AUD.
Unfavourable Movement Effects: * Acts as a negative shock, decreasing economic activity and national income. * Increases unemployment and lowers inflation. * Decreases the trade balance and leads to AUD depreciation.
Correlation: There is a strong positive correlation between changes in the ToT and the trade balance.

Dutch Disease: A phenomenon where a high AUD, driven by a mining boom, reduces the competitiveness of non-mining sectors (e.g., manufacturing and tourism), potentially leading to a "two-speed economy."
Recent Trends: Following the $2020$ Covid pandemic, the XPI rose more significantly than the MPI, leading the ToT to a record high in $2022$ . After $2022$ , the ToT fell as a slowing global economy reduced commodity demand while the MPI remained flat.

What formula is used to calculate the terms of trade index? * The correct formula is Export Price Index ÷ Import Price Index $\times 100$ .
What does a 'favourable' movement signify? * It signifies that Australia can buy more imports for a given volume of exports, leading to an increase in the standard of living.
Why does the RBA commodity price index weight mining at 90%? * Because mining exports dominate Australia's total commodity export earnings.
What is the impact of a significant fall in commodity prices? * It typically leads to a slowdown in economic activity and falling national income.
Define "Dutch disease" in the Australian context. * It is the negative impact of a high exchange rate on non-mining exporters and domestic producers.