Malaysia's Departure Tax — Macroeconomic Benefit and Cost, and Effect on Airlines

Answer

Part (a)

In imposing the departure tax, the Malaysian government would have weighed its macroeconomic benefits and costs.

Benefit — higher aggregate demand and growth. The tax deters some Malaysians from flying abroad, redirecting them to domestic tourism: spending switches from imports (overseas travel) to domestic consumption, raising $(C)$ or lowering $(M)$ and so raising aggregate demand. Through the multiplier, real national income rises by more than the initial change, boosting actual growth and reducing cyclical unemployment. The tax revenue can further fund infrastructure, training and R&D grants, raising both AD and AS for more sustainable, inclusive growth.

Cost — lower exports and inflationary pressure. The tax raises the price of air travel into and out of Malaysia, deterring some inbound tourists, so tourism exports $(X)$ fall, dampening the rise in AD and national income — a brake on growth at a time the economy is already slowing. As an indirect tax it also raises the airlines’ cost of production, lowering short-run aggregate supply and exerting cost-push pressure on prices and export competitiveness — though, since the tax falls only on air travel, the economy-wide effect is limited.

Part (b)

Two changes act simultaneously: the departure tax raises airlines’ costs (lowering supply), while continued — if slower — growth raises incomes (raising demand). Their net effect on equilibrium price, quantity and total revenue differs between international and domestic airlines, and is read through the elasticities.

International airlines — a simultaneous shift. The departure tax raises the cost of providing international flights, shifting supply left. International air travel has many substitutes and takes a large share of income, so its PED is elastic ($>1$): the supply fall raises price only slightly but cuts quantity more than proportionately, lowering total revenue (part of which is now tax). Meanwhile, positive growth raises income, and since international travel is a luxury with income-elastic demand ($YED > 1$), demand shifts right substantially; with supply slow to expand (PES $< 1$), this raises both price and quantity, raising revenue.

Because $YED > 1$, the demand rise likely outweighs the tax-driven supply fall, so equilibrium quantity probably rises; but the effect on total revenue is indeterminate — it rises if the revenue gained from growth exceeds the revenue lost to the tax, and falls otherwise. Two refinements: revenue from ASEAN routes (lower departure tax, higher necessity, lower $YED$) is more likely to fall than from non-ASEAN routes, so the outcome depends on the route mix; and if households turn pessimistic and hold back, demand rises only slightly and total revenue falls overall.

Domestic airlines — demand-side only. The departure tax is not levied on domestic flights, so their supply is unchanged. But the higher price of international flights raises demand for domestic flights as a substitute; since the two are weak substitutes ($0 < XED < 1$ — different travel experiences), demand rises less than proportionately. Rising income also raises demand, but domestic travel has a higher degree of necessity ($YED < 1$), so this too is a less-than-proportionate rise. With supply inelastic in the short run ($PES < 1$), the combined rightward shift in demand raises both the equilibrium price and quantity of domestic flights, raising their total revenue.

Judgement. The departure tax’s effects diverge across the two markets. For domestic airlines the outcome is unambiguously favourable — demand rises from both the substitute and income channels with supply unaffected, so price, quantity and revenue all rise, which is precisely the policy’s intent. For international airlines the outcome is ambiguous: quantity probably rises on income-elastic demand, but total revenue could move either way depending on whether the growth-driven revenue gain outweighs the tax loss, on the ASEAN/non-ASEAN route mix, and on consumer confidence. The decisive considerations are therefore the relevant elasticities (YED, PED, XED) and the strength of the growth offset: the more buoyant income growth and the more income-elastic international demand, the more likely international airlines also gain. The policy thus clearly helps domestic carriers while leaving international carriers’ fortunes conditional on the macroeconomic backdrop.