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Green Expectations: Climate Change and Homeowner Valuation of Dwelling Sustainability

Milind Goel (solo authored)

I compile seven million residential real estate transactions in the United Kingdom and recover discount rates used by homeowners to value dwelling sustainability. To do this, I calibrate the present value of energy savings from subsequent improvements in dwelling sustainability to the observed price premium. I show that homeowners accept lower returns for greener dwellings, evidenced by the declining structure of discount rates with increasing dwelling sustainability. Moreover, I exploit the spatial, temporal, tenurial, and vintage variation in premium to demonstrate that homeowners price sustainability following economic principles. My estimates provide direct measures for rates used to discount climate investments.
Keywords: climate finance, discount rates, green premium, household finance

Homeowners accept lower returns for greener dwellings

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The figure reports the marginal net discount rates obtained from our model using a stippled black line. The y-axis corresponds to the marginal rate that homeowners use to discount energy savings obtained from a unit improvement in the sustainability rating of a dwelling with an initial rating corresponding to the x-axis. The aggregate marginal discount rate associated with a dwelling rated 40 is 6.97%, decreasing monotonically to 3.79% for a dwelling rated 80. The preference heterogeneity shows that homeowners pay an excess premium for greener dwellings. I term this difference the green premium, which can be interpreted as the utility that homeowners derive from dwelling sustainability. 

Conferences

  • Society of Finance Studies (SFS) Cavalcade
  • Northern Finance Association (NFA) Annual Meeting (upcoming)
  • ESG Conference at Cornell SC Johnson College of Business
  • ​Business Schools for Climate Leadership Conference at IESE Business School
  • Ageing and Sustainable Finance Conference by Leibniz-Centre for European Economic Research 
  • Finance Forum organised by the Spanish Finance Association
  • INFORMS Annual Meeting
  • Trans-Atlantic Doctoral Conference at the London Business School

Legislator Tweets About the Green Transition and the Returns of Green versus Brown Stocks

To study the impact of green-transition regulation on firm value, we analyze stock returns around legislator tweets about climate change. Green stocks significantly outperform brown stocks in the one-to-ten-minute window around pro-transition tweets. The cumulative daily-average green-minus-brown portfolio return around pro-transition tweets is 6.9% higher than around anti-transition ones. For tweets that mention environmental regulations, the spread increases in the weeks preceding a congressional vote and is larger before close votes and when Congress is split. Our findings suggest that the green transition impacts the relative performance of green and brown stocks, at least partly, via a regulatory channel.  
Keywords: climate change, transition regulation, social media, high-frequency identification

Average daily GMB spread around a tweet accumulates to 6.9%

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We find that green stocks significantly outperform brown stocks in the one-to-ten-minute window around pro-transition tweets. The spread between green and brown stock returns around tweets is economically meaninful. The figure above depicts the resulting cumulative daily-average returns of a value-weighted green-minus-brown portfolio around pro-transition tweets (purple line) and around anti-transition tweets (yellow line). The aggregate green-minus-brown portfolio return accumulates to 1.5% around pro-transition tweets and -5.4% around anti-transition tweets. This 6.9% spread is economically significant because we effectively accumulate the returns around a single tweet on each of the 2,270 trading days in our sample.

Presentations

  • Asset Pricing and Machine Learning Conference at Gothenburg University
  • Conference in Sustainable Finance at University of Luxembourg (upcoming)
  • INFORMS Annual Meeting
  • WHU Otto Beisheim School of Management*
  • ESCP Business School*
  • Workshop on Unstructured Data and Language Models at the Michigan Ross School of Business*
  • ESG Workshop at Toulouse Business School*
  • Spring Workshop at ESADE*
  • Dauphine University*
  • Frankfurt School of Finance and Management*
    (* coauthor)
Green Premium
Environmental Tweets
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Copyright @ Milind Goel (2025)

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