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The Diffusion of Energy Efficiency in Building




     Nils Kok             Marquise McGraw      John M. Quigley
Maastricht University         UC Berkeley        UC Berkeley




                        AEA Meetings, Denver
                           January 2011
The Diffusion of Energy Efficiency in Building
The “energy paradox,” revisited
Increasing number of buildings certified as efficient
  Energy consumption and building technology are closely related
        30 percent, 40 percent, 70 percent, …
        Durability of real capital: existing structures continue to have impact


  Slow diffusion of more efficient technology
        Measures are profitable: CFLs, HVACs, …
        “Energy paradox” (Jaffe and Stavins, 1994)
        High discount rates (Hausman, 1979)
        Lower returns? (Metcalf and Hassett, 1999)


  Substantial increases in commercial buildings labeled as energy-
   efficient or “green”
Energy-efficiency labels and property markets
Energy Star (EPA) and LEED (USGBC)
  EPA’s Energy Star for Commercial Buildings (1995)
       Efficiency in energy use in (top quarter relative to CBECS)
       Standardized for building use (occupancy, hours) and climate
       Certified by professional engineer
       Based on real energy consumption (at least one year of bills)


  USGBC’s Leadership in Energy and Environmental Design (1999)
       Scoring systems based on 6 components of “sustainability”
       Energy efficiency is just one component
       Various systems and versions (e.g., NC, EB, O&M, ...)
       Based on design stage (and now verified after construction)
Program growth: Energy Star and LEED
48 MSAs, 1995 – 2010
Dominant forces in the commercial and institutional market




  2010:                              2010:
        10 percent of buildings             5 percent of buildings
        30 percent of stock                 10 percent of stock


  Size effect (Snyder, et al., 2003)   Registered: 27,000 buildings
                                                       (6b sq.ft.)
Labels reflect building technology
Energy paradox in commercial building?
  Labels verify hard-to-observe energy efficiency technology
        Comparable to role of patents in production technology (Keller, 2004)

  Certified buildings have lower resource consumption
        Energy Star: 35 percent less energy consumption, on average
        LEED: efficiency of new construction unclear, existing certified buildings
         on par with Energy Star requirements.

  Are measures profitable?
        Investments costs include: consultancy services, incremental cost of
         construction, design, equipment and materials
        Evidence on returns to investments
             Increased rents and asset values (Fuerst and MacAllister, 2011)

             Capitalization of incremental energy savings into asset values
              (Eichholtz, et al., 2010)

  Building technology (i.e., labels) should diffuse quickly across markets
Diffusion of certified space
Substantial differences in timing and growth across MSAs
          New York                      New York




         Los Angeles                   Los Angeles
The diffusion of energy efficiency in building (I)
Determinants of timing and growth
        “What determines the geographic dispersion in the timing and
           growth of energy efficient technology in office buildings?”


1.  Variations across markets in expected cost savings

        Climatic conditions (Degree days; NWS)
           Adverse climatic conditions increase expected economic payoff

        Energy prices (Cents/kWh; utility data EIA)
           Higher prices increase expected payoff from improvements
           Lower energy consumption in more expensive areas

        Property market conditions (Stock, vacancy, rents, prices; CBRE-EA)
           New construction depends on stage of property cycle
           Green “premium” varies with market conditions
Variations in the expected cost savings
Simple correlations, 2010 cross-section
The diffusion of energy efficiency in building (II)
 Determinants of timing and growth
2.  Local economic conditions that affect appropriability of gains
       Income (Average wages and salaries; BEA)
          Ancillary benefits of “green” buildings
          “Green” as a luxury good (Roe, et al., 2001); “warm glow”
       Size of service sector (Fraction of people employed in service sector; BLS)
          Demand for office space
       Size of government (Fraction of people employed by government; BLS)
          “Green” procurement policies
       Building professionals (LEED APs, architecture grads; GBCI, NAAB)
          Overcome information barriers (Hall, 2003)


3.  Building-specific characteristics that influence expected profitability
        Building size (Average building size, CBRE-EA)
          Spread fixed costs over larger base (Snyder, et al., 2003)
Local economic conditions
Simple correlations, 2010 cross-section
The diffusion of energy efficiency in building (III)
Determinants of timing and growth
4.  Institutional characteristics
       Political ideology (Vote for Reagan ‘84, Bush ’92; CQ Press)
           Political ideology may influence tenant and investor choices

       Regulation and incentives (LEED public policies; USGBC)
          Government policies may stimulate innovations (Lanjouw and Mody,
           1996; Jaffe and Palmer, 1997)
          Some cities have included LEED in building codes for new
           construction and renovations
          Numerous LEED-specific incentives: “fast-tracking” permits,
           subsidies, tax credits
Institutional characteristics
Simple correlations, 2010 cross-section
Dynamic models
    Levels, first differences and Arellano-Bond
    We model the dynamic relationship between the diffusion of energy
      efficiency over time and across geographic markets as:

    (1)       Fraction it = α + βX it−2 + εit

              Where X it−2 is a vector of income, prices and economic conditions
              We use a two-year lag to account for real time necessary to complete
€              renovations and new construction
              Serial correlation addressed by estimating AR(1) using FGLS
          €

    (2) ΔFractionit = α + βΔX it −2 + ε it

              First differences to control for time-invariant unobserved heterogeneity
              Alternatively, we estimate (2) following Arellano-Bond (1991),
€              instrumenting all covariates by their own lagged values
Basic regression results
LEED explained by income, Energy Star by energy prices
Arellano-Bond GMM Regression Results
Healthy market fundamentals increase technology diffusion
Conclusions and implications
Economic conditions important for energy efficiency diffusion
  Built environment important in reducing resource consumption
        Much attention to the “energy paradox” in building sector


  Diffusion of energy efficiency and “green” technologies in commercial
   property sector widespread and rapid
        30 percent of all commercial office space certified by Energy Star
        11 percent of all commercial office space certified by LEED

  Considerable variation in adoption of energy efficiency technologies
        Diffusion has been more rapid in areas with higher incomes and sound
         property market fundamentals (low vacancy rates, high rents and prices)
            This has important implications for underperforming markets (e.g.,
             Dallas, Detroit, and Tampa); these markets will lag behind in energy
             efficiency improvements
Conclusions and implications (II)
Energy paradox less important for commercial buildings
  Technology seems to diffuse faster in larger properties
        Improving energy efficiency of smaller buildings may need additional
         “nudge”

  Diffusion of energy efficient technology more responsive to energy
   prices than “green” technology
        Lends additional support for efficiency of investment decisions in
         commercial property sector (as opposed to residential sector)


  Diffusion of “green” technology is facilitated by human capital (i.e.,
   LEED APs) and governmental policies
        The environmental implications of this innovation remains unclear

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The Diffusion of Energy Efficiency in Building

  • 1. The Diffusion of Energy Efficiency in Building Nils Kok Marquise McGraw John M. Quigley Maastricht University UC Berkeley UC Berkeley AEA Meetings, Denver January 2011
  • 3. The “energy paradox,” revisited Increasing number of buildings certified as efficient   Energy consumption and building technology are closely related   30 percent, 40 percent, 70 percent, …   Durability of real capital: existing structures continue to have impact   Slow diffusion of more efficient technology   Measures are profitable: CFLs, HVACs, …   “Energy paradox” (Jaffe and Stavins, 1994)   High discount rates (Hausman, 1979)   Lower returns? (Metcalf and Hassett, 1999)   Substantial increases in commercial buildings labeled as energy- efficient or “green”
  • 4. Energy-efficiency labels and property markets Energy Star (EPA) and LEED (USGBC)   EPA’s Energy Star for Commercial Buildings (1995)   Efficiency in energy use in (top quarter relative to CBECS)   Standardized for building use (occupancy, hours) and climate   Certified by professional engineer   Based on real energy consumption (at least one year of bills)   USGBC’s Leadership in Energy and Environmental Design (1999)   Scoring systems based on 6 components of “sustainability”   Energy efficiency is just one component   Various systems and versions (e.g., NC, EB, O&M, ...)   Based on design stage (and now verified after construction)
  • 5. Program growth: Energy Star and LEED 48 MSAs, 1995 – 2010 Dominant forces in the commercial and institutional market   2010:   2010:   10 percent of buildings   5 percent of buildings   30 percent of stock   10 percent of stock   Size effect (Snyder, et al., 2003)   Registered: 27,000 buildings (6b sq.ft.)
  • 6. Labels reflect building technology Energy paradox in commercial building?   Labels verify hard-to-observe energy efficiency technology   Comparable to role of patents in production technology (Keller, 2004)   Certified buildings have lower resource consumption   Energy Star: 35 percent less energy consumption, on average   LEED: efficiency of new construction unclear, existing certified buildings on par with Energy Star requirements.   Are measures profitable?   Investments costs include: consultancy services, incremental cost of construction, design, equipment and materials   Evidence on returns to investments   Increased rents and asset values (Fuerst and MacAllister, 2011)   Capitalization of incremental energy savings into asset values (Eichholtz, et al., 2010)   Building technology (i.e., labels) should diffuse quickly across markets
  • 7. Diffusion of certified space Substantial differences in timing and growth across MSAs New York New York Los Angeles Los Angeles
  • 8. The diffusion of energy efficiency in building (I) Determinants of timing and growth “What determines the geographic dispersion in the timing and growth of energy efficient technology in office buildings?” 1.  Variations across markets in expected cost savings   Climatic conditions (Degree days; NWS)   Adverse climatic conditions increase expected economic payoff   Energy prices (Cents/kWh; utility data EIA)   Higher prices increase expected payoff from improvements   Lower energy consumption in more expensive areas   Property market conditions (Stock, vacancy, rents, prices; CBRE-EA)   New construction depends on stage of property cycle   Green “premium” varies with market conditions
  • 9. Variations in the expected cost savings Simple correlations, 2010 cross-section
  • 10. The diffusion of energy efficiency in building (II) Determinants of timing and growth 2.  Local economic conditions that affect appropriability of gains   Income (Average wages and salaries; BEA)   Ancillary benefits of “green” buildings   “Green” as a luxury good (Roe, et al., 2001); “warm glow”   Size of service sector (Fraction of people employed in service sector; BLS)   Demand for office space   Size of government (Fraction of people employed by government; BLS)   “Green” procurement policies   Building professionals (LEED APs, architecture grads; GBCI, NAAB)   Overcome information barriers (Hall, 2003) 3.  Building-specific characteristics that influence expected profitability   Building size (Average building size, CBRE-EA)   Spread fixed costs over larger base (Snyder, et al., 2003)
  • 11. Local economic conditions Simple correlations, 2010 cross-section
  • 12. The diffusion of energy efficiency in building (III) Determinants of timing and growth 4.  Institutional characteristics   Political ideology (Vote for Reagan ‘84, Bush ’92; CQ Press)   Political ideology may influence tenant and investor choices   Regulation and incentives (LEED public policies; USGBC)   Government policies may stimulate innovations (Lanjouw and Mody, 1996; Jaffe and Palmer, 1997)   Some cities have included LEED in building codes for new construction and renovations   Numerous LEED-specific incentives: “fast-tracking” permits, subsidies, tax credits
  • 14. Dynamic models Levels, first differences and Arellano-Bond We model the dynamic relationship between the diffusion of energy efficiency over time and across geographic markets as: (1) Fraction it = α + βX it−2 + εit   Where X it−2 is a vector of income, prices and economic conditions   We use a two-year lag to account for real time necessary to complete € renovations and new construction   Serial correlation addressed by estimating AR(1) using FGLS € (2) ΔFractionit = α + βΔX it −2 + ε it   First differences to control for time-invariant unobserved heterogeneity   Alternatively, we estimate (2) following Arellano-Bond (1991), € instrumenting all covariates by their own lagged values
  • 15. Basic regression results LEED explained by income, Energy Star by energy prices
  • 16. Arellano-Bond GMM Regression Results Healthy market fundamentals increase technology diffusion
  • 17. Conclusions and implications Economic conditions important for energy efficiency diffusion   Built environment important in reducing resource consumption   Much attention to the “energy paradox” in building sector   Diffusion of energy efficiency and “green” technologies in commercial property sector widespread and rapid   30 percent of all commercial office space certified by Energy Star   11 percent of all commercial office space certified by LEED   Considerable variation in adoption of energy efficiency technologies   Diffusion has been more rapid in areas with higher incomes and sound property market fundamentals (low vacancy rates, high rents and prices)   This has important implications for underperforming markets (e.g., Dallas, Detroit, and Tampa); these markets will lag behind in energy efficiency improvements
  • 18. Conclusions and implications (II) Energy paradox less important for commercial buildings   Technology seems to diffuse faster in larger properties   Improving energy efficiency of smaller buildings may need additional “nudge”   Diffusion of energy efficient technology more responsive to energy prices than “green” technology   Lends additional support for efficiency of investment decisions in commercial property sector (as opposed to residential sector)   Diffusion of “green” technology is facilitated by human capital (i.e., LEED APs) and governmental policies   The environmental implications of this innovation remains unclear