Efficiency vs Other GHG Abatement Actions: Policy Implications
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1 Efficiency vs Other GHG Abatement Actions: Policy Implications Mark Jaccard Simon Fraser University Vancouver May, /2011 Jaccard-Simon Fraser University 1
2 Talk Outline I. Debates in estimating the cost and achievable potential of energy efficiency. II. Using an energy-economy model to explain and assess cost estimates of energy efficiency and GHG abatement. III. Using an energy-economy model to estimate contributions of efficiency and other GHG abatement options under alternative targets and policies. 05/2011 Jaccard-Simon Fraser University 2
3 Reminder: actions and policies for GHG abatement Actions by households and firms Energy efficiency (if using fossil fuels) Fuel switching (away from fossil fuels) Emissions capture and storage The rest (industrial processes, landfill management, agriculture, forestry) Policies by government to drive actions Information Subsidies Regulations - prescriptive Regulations - flexible (RPS, vehicle standards) Emissions charges (carbon tax, cap-and-trade) 05/2011 Jaccard-Simon Fraser University 3
4 I. Debating efficiency cost curves: Déjà vu all over again 05/2011 Jaccard-Simon Fraser University 4
5 Energy efficiency cost curve $ / kwh delivered cost from new generation electricity rates efficient building shell 0 efficient motors efficient fridges efficient light bulbs electricity saved 05/2011 Jaccard-Simon Fraser University 5
6 GHG abatement cost curve energy efficiency dominant 05/2011 Jaccard-Simon Fraser University 6
7 Frequent conclusion Since energy efficiency is profitable, focus on it first. Being profitable, it can largely be achieved with noncompulsory information programs and subsidies (utility DSM), along with modest efficiency regulations. These two assumptions have dominated real-world climate policy for over two decades. 05/2011 Jaccard-Simon Fraser University 7
8 However,... While energy efficiency cost curves were already popular 30 years ago, they long ago fell out of favor with energyeconomy modelers, who argued the curves mislead about costs and therefore policy implications. Three key problematic assumptions with cost curves: efficiency actions assumed independent, markets and actors assumed homogeneous, technologies assumed perfect substitutes 05/2011 Jaccard-Simon Fraser University 8
9 Issue #1 Actions assumed independent Construction of cost curves implies that each action is completely independent of every other action. (extreme partial equilibrium analysis) (1) demand-side, (2) supply-demand (price, rebound, GHG content), (3) structural change, income and GDP effects $ / kwh cost of new hydropower dam Assumed independent 0 efficient fridges efficient motors efficient light bulbs electricity saved efficient building shell 05/2011 Jaccard-Simon Fraser University 9
10 Issue #2 Market conditions and participants assumed homogeneous Market evidence shows that acquisition of a more efficient or lower emission technology will cost X for the first 20% of the market, X+Y for the next 20%, X+Y+Z for the next 20%, and so on. Reasons include: different age of existing capital stock and hence cost of replacement at a particular time (reference case efficiency) local differences in transaction costs learning, acquisition, installation and operation (heterogeneity of market actors) 05/2011 Jaccard-Simon Fraser University 10
11 Issue #3 Technologies assumed perfect substitutes Quality of service assumed identical. But some technologies provide (or are perceived to provide) lower quality service a concern with new technologies especially (e.g., efficient light bulbs, transit vs personal vehicles) Risk assumed identical. But (1) long payback investments often higher investment risk, and (2) new technologies often higher failure risk. Incorporating these risks usually causes higher expected costs for high efficiency / low emissions technologies. 05/2011 Jaccard-Simon Fraser University 11
12 Energy-economy modelers: response to cost curve issues Construct integrated hybrid energy-economy models: integrate energy supply with energy demand integrate energy system with rest of economy Track technology stock turnover (possibly explicit vintages) Estimate model behavioral parameters that explicitly or implicitly incorporate heterogeneous: time preferences of decision-makers non-financial values (preferences related to technology attributes) perceived and real differences in technology risk 05/2011 Jaccard-Simon Fraser University 12
13 Typology of energy-economy models: Conventional bottom-up model Ideal model Macroeconomic completeness Technological explicitness Microeconomic realism Conventional top-down model 05/2011 Jaccard-Simon Fraser University 13
14 Hybrid energy-economy model: estimating CO 2 MAC curves $ / tonne CO 2 e multiple locations high efficiency fridge (heterogeneous market) includes transactions costs, preferences and risks throughout curve 50 simultaneous actions at any point (integrated model), including equilibrium feedbacks 20% 40% GHG abatement 05/2011 Jaccard-Simon Fraser University 14
15 II. Using a hybrid energy-economy model to explain and assess cost estimates of energy efficiency and GHG abatement (from Energy Modeling Forum 25) 05/2011 Jaccard-Simon Fraser University 15
16 CIMS hybrid energy-economy model: parameter estimation CIMS micro-economic behavioral parameters Discrete choice surveys and probabilistic choice models to estimate market heterogeneity (v), technology-specific risks and preferences (i), and low-risk time preference (r). Financial and intangible cost dynamics Technology learning from literature and neighbor effect from discrete choice surveys and literature. CIMS macro-economic goods and services demand response Simple multiple regression of systems of energy service demand and product demand functions. Recent research into income effect and rebound effect of demand for energy services and energy-using devices. 05/2011 Jaccard-Simon Fraser University 16
17 Example of empirical research the effect of greater energy efficiency on energy use? direct rebound effect relates to individual services and may be small in many cases but large in some (air mobility) evidence suggests 5-20% productivity rebound effect: more generally, gains in energy productivity drive economic growth, spill-over to other energy services and foster the creation of new services (fridge => desk-top fridge, wine cooler, beer cooler, water cooler) evidence uncertain, but could be extremely large 05/2011 Jaccard-Simon Fraser University 17
18 Service cost and service demand: UK lighting ( ) Energy service demand = f (GDP, service cost, other?) Year GDP A A x 15 Lighting service cost Per capita consumption B B x 1/3,000 C C x 6,500 Source: Fouquet and Pearson, The Energy Journal, /2011 Jaccard-Simon Fraser University 18
19 US data for other household devices - number 45 Steve Groves, SFU Computer 35 Devices per household Air conditioning and refrigeration Thermal Personal care Television Telephone Imaging 5 Audio Labour saving /2011 Jaccard-Simon Fraser Year University 19
20 Electricity consumption per household (kwh) US data for other household services-devices: income or price effect? Steve Groves, SFU 2009 Imaging Telephone Audio Personal care Labour saving Computer Air conditioning and refrigeration Thermal Television Year 05/2011 Jaccard-Simon Fraser University 20
21 Comparing CIMS and McKinsey methods (from EMF 25) CIMS McKinsey Model Type Hybrid. Conventional bottom-up. Tech Explicit? Yes. Yes. Financial Costs? Yes. Yes. Discount Rate Preference Costs? Node specific using RP & SP. Yes. Using RP & SP. 7% No. 05/2011 Jaccard-Simon Fraser University 21
22 Comparing CIMS and McKinsey continued Market Heterogeneity? Integrated? Feedback Effects? Policy Simulation? CIMS Yes. Endogenous. Yes. Actions interdependent. Yes. Energy S-D and macro. Yes (e.g. emissions price). McKinsey No or exogenous. No. Exogenous approximation. No or exogenous. No. 05/2011 Jaccard-Simon Fraser University 22
23 CIMS and McKinsey GHG abatement cost curves: US in Marginal Cost ($/tonne CO2e) CIMS McKinsey GHG Emissions Reduction (%) 05/2011 Jaccard-Simon Fraser University 23
24 Contributions to GHG abatement at $50/tonne CO 2 e: US in Share of Abatement Potential (%) McKinsey CIMS Energy Efficiency Fuel Switching Carbon Capture and Storage Process Emissions 05/2011 Jaccard-Simon Fraser University 24
25 Changing CIMS assumptions CIMS McKinsey Tech Explicit? Yes. Yes. Financial Costs? Yes. Yes. Discount Rate Preference Costs? Node specific using RP & SP. 7% Yes. Using RP & SP. No. 7% No. 05/2011 Jaccard-Simon Fraser University 25
26 Changing CIMS assumptions continued Market Heterogeneity? Integrated? Feedback Effects? CIMS Yes. Endogenous. Yes. Actions interdependent. Yes. Energy S-D and macro. Partly disabled. McKinsey No or exogenous. No. Exogenous approximation. No or exogenous. 05/2011 Jaccard-Simon Fraser University 26
27 GHG abatement cost curves: US Marginal Cost ($/tonne CO2e) CIMS (original) McKinsey (mid-range) CIMS (McKinsey compare) McKinsey (high-range) GHG Emissions Reduction (%) 05/2011 Jaccard-Simon Fraser University 27
28 Contributions to GHG abatement at $50/tonne CO 2 e: US in Share of Abatement Potential (%) McKinsey CIMS CIMS (McKinsey compare) Energy Efficiency Fuel Switching Carbon Capture and Storage Process Emissions 05/2011 Jaccard-Simon Fraser University 28
29 III. An energy-economy model to estimate efficiency and other abatement options under alternative targets and policies (from Energy Modeling Forum 24) 05/2011 Jaccard-Simon Fraser University 29
30 EMF 24 Study Parameters Technology Assumptions: optimistic/pessimistic End-use CCS Nuclear Wind & Solar Bioenergy Policy : 50% Cap below 2005 levels 05/2011 Jaccard-Simon Fraser University 30
31 Achieving 50% GHG reduction by 2050 requires vast reduction from supply-side in all scenarios GHG Emissions, MtCO2e supply sectors demand sectors 2005 US4 US16 US22 US14 US20 US24 US18 US3 05/2011 Jaccard-Simon Fraser University 31
32 Achieving 50% by 2050 requires big change in vehicle stocks 100% 80% 60% 40% 100% Ethanol (E85) PHEV & Electric HEV Conventional (ICE) 20% 0% 39% 26% 12% Base BAU Optimistic Pessimistic /2011 Jaccard-Simon Fraser University 32
33 30,000 Achieving 50% causes increased electricity use which offsets increased end-use efficiency Electricity Demand (PJ) 25,000 20,000 15,000 10,000 5,000 Optimistic Pessimistic /2011 Jaccard-Simon Fraser University 33
34 Conclusion Using a hybrid model, we find higher costs for energy efficiency and thus also for GHG abatement than McKinsey-type bottomup analysis. The main reason is that hybrid models incorporate parameters reflecting technology-specific risk and quality of service into their estimates of technology costs. When analysis includes productivity rebound effects that offset in part efficiency gains, then fuel switching and perhaps carbon capture must play a large role in GHG abatement. Our policies should reflect this now. Energy efficiency policies must be accompanied by GHG pricing and/or regulations affecting technology or fuel choices. 05/2011 Jaccard-Simon Fraser University 34
35 Conclusion continued As an economist, I should be explaining how emissions pricing saves money relative to sector-specific, technology-specific, and fuel-specific GHG emissions regulations. However, when the needed reduction is 50% by mid-century (80% if scientists are correct and our politicians sincere) it may not matter if we rely mostly on regulations. Emissions must fall dramatically from supply-side and demand-side. If, instead, we insist on emissions pricing, and never achieve this because of political constraints, then our approach will help ensure a horrendous environmental outcome with huge costs for all. 05/2011 Jaccard-Simon Fraser University 35
36 Extra slides 05/2011 Jaccard-Simon Fraser University 36
37 Greater technical energy efficiency Technologist s profitable efficiency If environmental externalities were internalized? Technologist s explanation: Market barriers: financing, info, split-incentive, capacity Economist s critique: Technologies differ with respect to risk, Technologies differ with respect to quality Firms & consumers heterogeneous Economist s profitable efficiency Address real market failures: Information as public good, Average cost pricing of utilities Baseline efficiency trend Passage of time
38 Declining capital cost function Technology and preference dynamics: CIMS Links a technology s financial cost in future periods to its cumulative production Reflects economies-of-learning and economies-of-scale Parameters taken from literature Declining intangible cost function Links the intangible costs of a technology in a given period with its market share in the previous period Reflects improved availability of information and decreased perceptions of risk the neighbor effect Mostly estimated from our own empirical studies 05/2011 Jaccard-Simon Fraser University 38
39 300 McKinsey vs. CIMS EMF 25 (US 2030) CIMS marginal abatement cost curve $/tco McKinsey abatement cost curve Gigatonnes CO2 abated /2011 Jaccard-Simon Fraser University 39
40 CIMS technology share algorithm for new stocks MS j = K k = 1 CC j CC 1 k 1 r ( 1+ r) r n ( 1+ r) + OC n j + OC + EC k j + EC + i k j + i v k v Discount rate (r) - time preference, option value, risk premium Intangible cost (i) - costs and benefits additional to simple financial costs Market heterogeneity (v) - different consumers and businesses have different preferences and perceptions, and may experience different costs in different locations. 05/2011 Jaccard-Simon Fraser University 40 Market share of alternative A 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% Ratio of LCC A and B
41 Discrete choice models to estimate r, i and v in CIMS Survey / Observation Empirical Model (DCM) CIMS r, i and v Standard discrete choice model for technology choice surveys U j = β j + βcccc + βococ + β EC EC + CC β j r = i j = β β β AC AC e j v = ordinary least squares to estimate value for which predictions from CIMS are consistent with those from the DCM model. Depends on size of error terms relative to values of beta parameters. 05/2011 Jaccard-Simon Fraser University 41
42 CIMS technology learning and neighbor effect functions capital stock turnover and technology-specific progress ratios for capital cost or life cycle cost CC = f(cumulative production) CC( t) = CC(0) N( t) N(0) log 2 ( PR) technology-specific intangible cost function related to market share as in product market forecasting key technological areas i( t) = 1+ i(0) k Ae * MS t 1 05/2011 Jaccard-Simon Fraser University 42
43 EMF 25: simulating US energy and GHG policies 7000 GHG emissions Mt CO2e Reference Case Carbon Tax Energy Tax Standards Subsidies Standards and Tax /2011 Jaccard-Simon Fraser University 43
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