A study by researchers at the University of Wisconsin-Madison, Georgetown University and the University of Notre Dame has found that high levels of greenhouse gas (GHG) emissions can have a negative impact on a company’s value. According to the study – Voluntary Disclosures and the Firm-Value Effects of Carbon Emissions (April 2011) – a company’s value decreases on average by $202,000 for every additional thousand metric tons of emissions it produces.
Researchers used hand-collected carbon emissions data for 2006-2008 that Standard and Poor’s (S&P) 500 companies disclosed voluntarily to the Carbon Disclosure Project to examine two issues: (1) firm-level characteristics associated with the choice to disclose carbon emissions, and (2) relationship between carbon emission levels and firm value. With respect to the first issue, researchers found a higher likelihood of carbon emission disclosures by firms with superior environmental performance, conditional on firms taking environmentally proactive actions. However, researchers found no association between inferior environmental performance and the likelihood of disclosing carbon emissions, conditional on firms taking environmentally damaging actions. Furthermore, researchers found that companies are more likely to voluntarily disclose their carbon emissions as the proportion of industry peer firm disclosers increases. In connection with the second issue, the researchers found a negative association between carbon emission levels and firm value. From its sample of S&P 500 companies, the study found that a company’s value decreases on average by $202,000 for every additional thousand metric tons of GHG emissions it produces.
In the study, researchers also pointed out that according to the 2009 Goldman Sachs’ GS Sustain Report it is expected that the relationship between carbon emissions and global climate change will drive a redistribution of value from firms that do not control their carbon emissions successfully to firms that do.
The study may be accessed online