Lorenz Curve & Gini Coefficient
See how evenly income is shared in seven real countries, decile by decile.
Production Possibility Curve
Test output combinations, then shift the curve with growth and shocks.
Foreign Exchange Market
Push the NZ dollar up and down, and see who wins and loses.
Import Quota Simulator
Set an import quota and watch prices and welfare shift.
Tariff Impact Simulator
Add a tariff and see prices, revenue and welfare change.
Two-Country Trade Model
Shift supply or demand in either country and find the world price.
Externalities & Interventions
Model a spillover, then fix it with a tax or subsidy.
Market Intervention & Elasticity
Apply a ceiling, floor, tax or subsidy and see elasticity at work.
Country Information
Build a live profile of any country: people, economy, trade and politics.
Elasticity & Total Revenue
Drag the price along a demand curve to see the total revenue rectangle, point PED and the TR curve, then compare supply curves and time periods for PES.
Related Markets
Shock one market and watch the knock-on shift in a linked market: substitutes, complements, derived demand and joint supply.
Costs of Production
Change a bakery's rent, input prices and selling price and watch its total and average costs, profit, break-even output and economies of scale.
Labour Market & Wages
Shift the demand for and supply of labour, set a minimum wage, let a trade union bargain, and compare two jobs to see why wages differ.
AD/AS Model
Shift aggregate demand and supply with sliders for spending, costs and productive capacity, and see the price level, real GDP and output gap change, in the classical and Keynesian views.
Business Cycle & Growth
Set the trend growth rate and the cycle, then drag through the years to see boom, recession, slump and recovery, the output gap and the growth rate.
Circular Flow of Income
Build the circular flow from two sectors to four, change injections and withdrawals, and watch national income move round by round until J = W.
Index Numbers
Build a weighted CPI from a basket of goods, turn nominal values into real ones, and work out whether the terms of trade improved.
Comparative Advantage
Set two countries' production possibilities, find the absolute and comparative advantage, then specialise and trade to see the gains and the terms of trade where both win.
Shift Storm
News headlines fall on a live market: shift demand or supply the right way before they land, and watch the new equilibrium settle.
Elasticity Sniper
Goods fall with their price and quantity changes: shoot each into elastic, inelastic or unit elastic, then take on income and cross elasticity.
Account Drop
New Zealand's transactions fall as blocks: drop each into the right part of the balance of payments, as a credit or a debit.
Subsidy Simulator
See how a subsidy to New Zealand producers changes output, imports or exports and the balance on goods, who pays, and how it compares with a tariff and a quota.
Terms of Trade Lab
Calculate New Zealand's terms of trade (base 1000), see what an improvement means for export receipts, the balance on goods and the NZ$, and practise.
Free Trade Agreement Explorer
Follow a free trade agreement step by step: a partner removes its tariff on a New Zealand export, and exports, the NZ$ and groups in New Zealand change.
Exchange Rate Chain Reaction
Build the chain from a trade event through the NZ dollar to exporters, consumers and other groups, link by link, with the FX graph beside it.
Current Account Calculator
Work out the balances on goods, services and income, the current account and its % of GDP, step by step, with feedback on common mistakes.
Who Wins, Who Loses?
Tariffs, quotas, subsidies, exchange rates and FTAs: say which groups are better or worse off, then why, before the card lands.
Exam Answer Builder
Practise NCEA Level 2 trade exam questions: complete the models, calculate, and build Merit and Excellence answers with a checklist.
IGCSE Exam Coach
Work through Cambridge IGCSE Paper 2 questions: decode the command word, build an answer that earns the marks, check it against the mark scheme.
AS Essay Writer
Plan and write Cambridge AS essays: the 8-mark part (a) and the 12-mark part (b), with diagrams, both sides, evaluation that compares, and a justified conclusion.