Equilibrium price
$10
Current market-clearing or controlled price
Econ Arcade // Phase 1
Supply & Demand Lab
Run a tiny market. Push demand, supply, and policy levers. Watch equilibrium price, quantity, surplus, deadweight loss, and stability respond.
Equilibrium quantity
100 units
Units traded after the latest move
Shortage / surplus
Balanced
No excess demand or supply
Consumer surplus
$475
Simplified buyer value above price
Producer surplus
$325
Simplified seller value above cost
Deadweight loss
$0
Lost gains from trades that no longer happen
Market stability
92/100
Falls with shocks, gaps, and deadweight loss
Demand index
100
100 is scenario baseline
Supply index
100
100 is scenario baseline
Debrief loop
What happened?
Baseline equilibrium is stable: buyers and sellers agree on the current price and quantity.
Easy mode readout: compare this move to the baseline. Demand shocks move price and quantity in the same direction; supply shocks move price and quantity in opposite directions; binding controls and taxes reduce efficient trades.
Market movement console
Last 6 movesStart
Price
$10
Qty
100