All Notes Flashcards
What are the conditions for a free market to produce an efficient outcome?
Markets exist for all goods and services
All markets are perfectly competitive
Property rights are fully assigned in all resources
No externalities exist
Define static efficiency?
Allocation of resources lead to a maximisation of economic surplus
Give examples of market failure?
Absent Property Rights Externalities Public Goods Government Failure Imperfect Market Structure
What are the 3 strucutres required for property rights to be efficent?
Exclusivity - All benefits are accrued to the owner
Transferability - Should be transferable to others
Enforceability - Should be secure from seizure or encroachment
What are the 5 types of property rights?
Private Property Regimes - Individuals hold entitlement
State Property Regimes - Governments own all property
Common Property Regimes - Property jointly owned and managed by a specific group
Common Pool Resources - Non exclusivity and diversity
Open Access Regimes - No one owns the resources
What are the three types of externalitiy?
Negative: Costs to a third party : Pollution
Positive: Benefits to a third party: Airport construction
Pecuniary: External effect comes from a change in price
What is the Coase Theorem?
When negotiation costs are negligible and affected parties can freely negotiate an efficient allocation will be reached
What are some methods of Government Failure?
Rent Seeking - Resources are used in lobbying government for protection rather than efficency
Define Dignity?
If an item does not have a price, there is no equivalent hence dignity.
A project will go ahead where the CBA shows:
The NPV = Benefits - Costs - Environmental Costs >0
What are the four costs?
Use Value (UV) - The cost that arises from the use of the service Existence Value (EV) - The cost that arises from the services existsance Option Value (OV) - The cost of the willingness to pay to preserve availability of a good for future use Quasi Option Value (QOV) - The willingness to pay to not commit to an irreversible commitment
How does the Kaldor and Hicks valuation method work?
Preferences of individuals through willingness to pay for a benefit /accept compensation for a cost
What is Pareto optimality?
You can not make somebody better off without making somebody worse off
Name some critics of environmental CBA.
Scitovsky (1941) - Contradiction in hypothetical compensation logic
Samuelson (1942) - Marginal utility of income is not constant
Lipsey / Lancaster (1956) - Second best theorem
Arrow (1951) – “Impossibility theorem”. We cannot reasonably go from individual preferences to a social ordering of states
What is the formula for a CBA?
Sum[WTPG(1+S)^-t] - Sum[WTPL(1+S)^-t >0
S = Discount Rate
What is the formula for a CBA if the loosers have property rights?
Sum[WTPG(1+S)^-t] - Sum[WTAL(1+S)^-t >0
S = Discount Rate
How is risk treated in a CBA?
The PVNB is weighted by its probability of occurrence.
EPVNB = Pi*PVNB.
What is discounting?
Reducing the value of future assets
A high discount rate means future assets have a low value
What is the formula for a discount factor?
W = 1/(1+s)^t
Why could discounting be classed as rational?
Time preference: Pure impatience, Risk of death, Risk and uncertainty, Diminishing Marginal Utility
Productivity of Future Capital:
Next generation will be even more advanced and richer so do not need our help
What are some critiques of discounting?
Not enough info for consumers to maximise utility
Interests may conflict with those of society
Society lives longer than individuals
Productivity of Capital:
Will the definitely be better in the future?
Name some methods of environmental Valuation.
Stated Preference: Methods to elicit respondents (WTP) when the value is not observable
Revealed Preference: Methods based on actual observable choice from which values can be inferred
What is contingent valuation?
A survey based on stated preference techinque.Can be distributed by face to face, mail or telephone.
Why is there disparity between WTP and WTA?
WTP is less than WTA as:
Individuals view changes from the normal
Gains and losses are subject to diminishing returns
Value function is steeper for losses than gains
What are some methods of stated preference valuation?
Direct: Contingent Valuation
Indirect: Choice Experiments
What is the main problem with contingent valuation, give examples.
Part – whole bias. The value for a specific good the same as for a more inclusive good.
Hypothetical bias - The question is hypothetical
Interviewer bias - Yea saying - to please the interviewer
Strategic bias – respondents believe answers will affect their tax liability
Starting point bias – anchoring
What is choice experiments?
Indirect stated preference technique.
Respondents are presented with a number of discrete alternatives and asked to state which they prefer
What are the benefits of choice experiments?
Monetary values implicit – no WTP question
Can deal with non-use values
Avoids yea and nay-saying
WTP values can be transferred across project analyses
What is the formula for choice experiments?
V= a+ B1X1 + B2X2 +BNXN +BCXC
V=utility, a = constant B1=Ratio of coefficients
X1 = other attributes C = Cost
What are some problems with Choice Experiments?
CE places greater strain on cognitive abilities
Respondents then resort to simple rules of thumb as a way of ‘solving’ the CE puzzle
Respondents might select one alternative regardless due to its name
What attributes to include and how to desribe them
What are some methods of revealed preference valuation?
Indirect:Travel Cost
Indirect: Hedonic Property Values
What is the Travel Cost Method?
Indirect revealed preference
Based on the cost of travel to the site revealing its value
What is the formula for travel cost method?
Ln(Vi)= a-bc +e Vi= visit per cost per person per year a=Constant C=Cost per trip e= Error term
What are some problems with the travel cost method?
Travel costs are usually ‘researcher estimates’
Assumes visitors react to variations in TC as they would to price (entrance fee) variation
If he does not go, he gains no utility. What about non-use values
Assignment of costs to components of multi-purpose trips is problematic
Substitute sites – a properly specified demand function for site ‘i’ would include prices of substitute sites.
What is the Hedonic Pricing Method?
Indirect revealed preference
Describes the price of a quality differentiated commodity in terms of its quality attributes
What is the formula for the Hedonic pricing method?
Pi= f(Eit...Eim, Nil...Nin, Sit...Siq) m=Environmental Attributes of I n=Neighbour attributes of N q= site attributes of S Pi=The price of the house
What is a damage function?
DF represents the relationship between containment of a pollutant and the damage reduction (in physical terms)
Define Dynamic Efficency?
The allocation of resources across time maximises the present value of net benefits
What is the social welfare function in general, utilitarian and continuous time with infinite horizon form?
General W=W(U0,U1…Un)
Utalitarian: W = U0 + U1/1+P + U2/(1+P)^2…UT/(1+P)^T
P =social discount rate
Infinite Horizon W=INT[U(Ct)e^-pt)] between infinity 0
What is hatwicks rule?
If all scarcity rent is invested in capital, total capital will not decline
Scarcity rent is the surplus value after all costs and normal returns have been accounted for
What are the 3 sustainability criterion?
Strong Sustainability- Maintenance of stock of natural capital
Weak Sustainability- Maintain the value of total capital
Environmental Sustainability- Maintain certain physical flows of certain individual resources
What is the difference between renewable flow & stock resources?
Flow: Cannot be depleted e.g. solar
Stock: Can be depleted e.g.living orgranisms
What is the formula for the basic growth process?
Gt=St+1-st
G= Amount of Growth S= Stocksize
What is the simple logistics growth function?
G(s)= gs(1- [s/smax])
G= Amount of Growth S=Stock size
SMAX=The finite upper bound of stock i.e.. Carrying capacity
g= The intrinsic fixed growth rate of the population, the rate it would grow when it is small relative to carrying capacity
Explain a steady state harvest.
G= Net Natural Growth H= Harvest
In a steady state, G=H and this gives a sustainable yield Therefore stock remains constant over time
What is a Maximum sustainable yield?
The harvest that occurs when natural growth is maximised
Why would economists state the MSY is not efficent?
If the cost of harvest is included (effort) the MSY is no longer the best outcome
Why will open access resources lead to over exploitation?
There is no incentive to save resources, hence each agent will increase until AR=AC instead of MR=MC
What external costs does open access create?
Contemporaneous external costs: Imposed on the current generation from overfishing
Inter-generational external costs: Imposed on the future generation from the exploitation of the stock today
Overfishing reduces stocks and thus future profits.
What factors make extinction more likely?
Higher market price, Lower harvest cost, Higher discount rate, a larger critical minimum threshold
What is the DPSIR model?
Land Use Indicator Framework :Measures of land use as indicators of environmental condition and quality
Driving forces: Climate change, agricultural markets
Pressures: Urbanisation, deforestation
State: Stock of land cover, production of food
Impacts: Loss of landscape quality, Biodiversity
Responses, Planning decisions, control and regulation
What are the sources of inefficient land use and conversion?
Sprawl and Leapfrogging:
Sprawl- When land is inefficiently dispersed
Leapfrogging - A situation in which new development continues futher out
The Public Infrastructure Problem:
Low marginal cost of driving (Ownership vs use) Free Parking
Incompatible Land Uses:
One traditional Remedy is zoning but this promotes urban sprawl
Undervaluing Environmental Amenities
What are the three hypothesis to explain global malnourishment?
A global Scarcity of Food
A Mal-distribution of food among and within nations
Temporary shortages caused by natural phenomenon
What are the four services of ecosystems?
Supporting - Nutrient cycling, soil formation
Provisioning - Food, fresh water
Regulating - Climate, flood
Cultural - Aesthetic, recreational
How could we decide to conserve wildlife?
Could protect the species: there intrinsic value
Could protect their genetic information
What are the two types of damage polution?
Flow - Damage Pollution: Damage results from the flow of residuals
Stock - Damage Pollution: Damages depend on the stock of pollutant at any point in time
What is a UM polutant?
A pollutant is Uniformly Mixing (UM) if it is quickly dispersed and its spatial distribution if uniform e.g. Concentration does not vary from place to place
The location of the source is thus irrelevant
What matters is the amount of emissions
What is a non UM pollutant?
A pollutant is non uniformly mixing if it does not disperse and hence the location of the source matters
What are the three pollutant control instruments?
Institutional Approach
Command and Control
Economic Instrument
What are the three forms of institutional approach?
Facilitation of bargaining: Reduce bargaining costs
Specification of liability
Development of social responsibility: Promote Citizenship
What are two variants of the facilitation of bargaining?
Improve the effectiveness of property rights
Encourage greater social responsibility in making choices
What is the Coase bargaining solution?
Establish legally enforceable property rights
Assume zero transaction cost
This yields efficient outcome, internalised externalities and no intervention
Name some limitations of the bargaining solution
Bargaining unlikely unless there is well defined property rights
Requires expected gains > expected costs
Bargaining over time and across generations
What are the two variations of liability: incentive mechanisms.
Strict Liability PR2V: The injurer pays full compensation to victim
Negligence LiabilityPR2I: The injurer only pays if he is not taking sufficient precautions
What are the problems with liability
If a public bad, the use of liability is not feasible
Difficult where damage appears long after discharge
Name the command and control instruments
Input controls over quantity and mix of inputs Technology controls Output quotas or prohibitions Emissions licences Location controls
Evaluate Command and control.
Attractive: Certainty of outcome
Quick
Unattractive Likely to be cost inefficient
Fails to equalize marginal abatement costs
They generally lack good dynamic incentives
Name the two types of economic instruments.
Emissions charges / Taxes
Pollution Permits
Name the types of emission charges.
Natural resource taxes
Product charges / taxes
Emissions abatement and resource subsidies