You are expected to evaluate/examine (AO3) export subsidies and their effects on markets and stakeholders (SL+HL), draw (AO4) the effect of export subsidies on price, production, consumption, and welfare (SL+HL), and calculate (AO4) the financial effect of export subsidies (HL)
Export subsidies are a second way the government can assist producers. By giving firms extra money for exporting their goods, exports can increase.
This diagram explains how an export subsidy works:
Before export subsidy:
Domestic producers produce at Q3, because price is at P1
Consumers consume at Q2, because price is at P1
Hence, the rest is exported (Q2 <-> Q3)
After export subsidy:
Domestic producers get a subsidy of P1 <-> P2, so they produce as if the price is P2, so at Q4
Since producers get a higher price exporting, they are only willing to sell domestically if they get the same price P2
This means domestic consumers now have to pay P2 instead of P1, reducing their demand from Q2 to Q1
Hence, the new exported amount is Q1 <-> Q4
Effect on Consumers
Because firms can now earn more money by exporting, they are only willing to sell domestically if they can sell at the same price as abroad.
This means consumers now have to pay more money for the same product, decreasing their surplus
Effect on Producers
Firms now get to sell more of their products while also earning more per product, in the form of payments from the government.
This means domestic producers have increased their surplus significantly
Effect on the Market (Consumers+Producers)
Because the producer gain is larger than the consumer loss, the market experiences a positive surplus change
Effect on the Government
The government has to dish out a subsidy (shown as the blue rectangle on the first diagram on this page), which is taxpayer money it could have spent on other things (opportunity cost)
A welfare loss is still created, as some of the subsidy does not translate to surplus for producers (see the two blue triangles). This is because due to the subsidy, producers are not as incentivized to produce as efficiently as before
This is very similar to calculating the changes in surplus and revenue for tariffs, quotas, and normal subsidies (just areas of triangles and rectangles)
Consumer Surplus and Expenditure (use arrows to see changes)
Domestic Producer Surplus and Revenue (use arrows to see changes)
Cost of Subsidy & Welfare Loss
This welfare loss comes from the fact that the government spends that rectangle, but only a portion of that goes to producer surplus. The rest is "lost" as producers lack the incentive to become more efficient, hence there is a welfare loss.