formulas paper 3 Flashcards
Percentage Change (%Δ)
%Δ = (New - Old / Old) x 100
PED (Price Elasticity of Demand)
%Δ in Qd of the product / %Δ in P of the product
Market Equilibrium
When Qd = Qs
YED (Income Elasticity of Demand)
%Δ in Qd of the product / %Δ in the income of the consumer
XED (Cross Elasticity of Demand)
%Δ in Qd of product A / %Δ of P of product B
PES Indicators (Values)
PES > 1 - Supply Elastic
PES < 1 - Supply Inelastic
PES = 0 - Vertical Supply Curve (inelastic), 0 response to ΔP
PES = ∞ - Horizontal Supply Curve (elastic)
XED Indicators (Values)
Positive Value - Substitutes
Negative Value - Complements
PES (Price Elasticity of Supply)
%Δ in Qs of the product / %Δ in P of the product
PED Indicators (Values)
PED > 1 - Price Elastic
PED < 1 - Price Inelastic
PED = 1 - Unit Elastic
PED = 0 - Perfectly Inelastic
PED = ∞ - Perfectly Elastic
YED Indicators (Values)
YED < 0 - Inferior Good
YED > 0 - Normal Good
YED > 1 - Luxury Good
Real GDP
Real GDP = Nominal GDP / GDP Deflator
GDP Per Capita
GDP / Population
AD (Aggregate Demand)
AD = C + I + G + (X - M)
C: Consumption
I: Investment
G: Government Expenditure
X: Exports
M: Imports
GDP (Gross Domestic Product)
GDP = C + I + G + (X - M)
C: Consumption
I: Investment
G: Government Expenditure
X: Exports
M: Imports
Nominal GDP
Quantity of goods x Price
or
Real GDP x GDP Deflator
GNI (Gross National Income)
GNI = GDP + (Income from abroad - Income sent abroad)
MR (Marginal Revenue)
Rate of Change in TR per increase in quantity sold
∆TR / ∆Q
Keynesian Multiplier
1 / MPS + MPT + MPM
or
1 / 1-MPC
or
Changes in Real GDP / Initial Change in Spending
MPC (Marginal Propensity to Consume)
Change in Consumption / Change in Income
MPS (Marginal Propensity to Save)
Change in Savings / Change in Income
MPT (Marginal Propensity to Tax)
Change in Tax / Change in Income
MPM (Marginal Propensity to Import)
Change in Imports / Change in Income
CPI (Consumer Price Index)
( value of basket in Specific Year / value of basket in the Base year ) x 100
Weighted Price Index
( Cost of Basket in a specific year / Cost of Basket in the base year ) x 100