Préparation examen 2 Flashcards
Environmental economics
Economics is how we organise scare resources in the most effective way, in a limited world. Environmental economics is economics applied to environmental issues
Price
Monetary value or quantity, a customer has to give up to get the product
Cost
What you have to give up for factory inputs in a production process
Perfect competition
Free entry and exit - Homogeneity - Many buyers and sellers - No transaction cost - Perfect information - Property rights - Rationality
Movement
On the same curve, higher price = higher quantity
Shift
For the same price level, the quantity will be higher or lower
Demand
The negative link between quantity demanded and price : when P increases, Q decreases
Income effect
Decrease of income = increase of D for inferior goods + decrease of D for normal goods
Substitution effect
Price increase of good A = consumption increase of good B
Things influencing the consumption of the same good
Price expectation - Price of related goods (substutes and complements) - Size and structure of the population - Taste
Equilibrium
When quantity supplied matches the quantity demanded (E : P when Qs = Qd = Q)
Surplus (excess supply)
A situation in which quantity supplied is greater than quantity demanded : price decrease
Shortage (excess demand)
A situation in which quantity demanded is greater than quantity supplied : price increase
Market failure
Inability of the market to allocate resources efficiently caused by :
- Market power from few players
- Imperfect info
- Existence of transaction costs
- Existence of external costs or benefits
Externality
Cost or benefit of a good or service that is uncompensated and that will impact on a third party due to external cost or benefit. It can be negative (Private costs > social costs = external costs > 0) or positive (Social benefits > private benefits = external benefits > 0)
Welfare economics
The study of how the allocation of resources affects economic well-being :
- Maximum price a buyer is willing to pay to get 1 unit of the good. The more he will buy the good, the less he is willing to pay for the extra unit.
- Minimum price a seller agrees to produce a product
Consumer surplus
The difference between the maximum price a consumer is ready to pay for a good or service and the actual price he pays
Producer surplus
The difference between the minimum price a firm is ready to produce a good or service and the actual price it takes
Market surplus
Consumer surplus + producer surplus : the sum up of all the individual surplus
Dead weight loss
Consumer surplus + producer surplus : the sum up of all the individual surplus
Sink function
The ability of the natural environment to absorb wastes and pollution (self-sustained system). We are overwhelming it
Market-based instruments to get the optimum price
Rely on economic forces to achieve environmental protection.
Act on price set up :
- Tax / subsidies
- Property rights
Act on quantity control = command-and-control of regulation :
- Regulations
- Standards
Act on both :
- Pollution tradable permits
Elasticity
How sensitive one variable would be to another variable
Determinants of Price Elasticity of Supply
- Inputs availability
- Ease of storing
- Productive capacity
- Size of the sector, firm or market
- Time adjustment
Perfectly inelastic PES (PED)
PES (PED) = 0
No response to change in price in quantity supplied
Inelastic PES (PED)
0 < PES (PED) < 1
% change in price > % change in quantity
Unitary elastic PES (PED)
PES (PED) = 1
% change in price = % change in quantity
Elastic PES (PED)
PES (PED) > 1
% change in price < % change in quantity