Topic
Area: Eco-Labeling
Geographic Area: Denmark
Focal Question: Does
eco-labeling have a significant impact on consumer demand?
Sources:
(1) Bjorner, Thomas Bue,
Lars Garn Hansen, and Clifford S. Russell (2002). “Environmental Labeling and
Consumers’ Choice – An Empirical Analysis of the Effect of the Nordic Swan.”
Working Paper No. 02-W03, Department of Economics, Vanderbilt University. http://ideas.repec.org/p/van/wpaper/0203.html
(2) Tietenberg Tom
(1998), ”Disclosure Strategies for Pollution Control”Environmental and
Resource Economics
11, p. 587-602.
(3) Sen, Amartya (1973).
“Behavior and the Concept of Preferences.” Economica, 40, p. 241-59.
(4) Dosi, Cesare and
Michele Moretto (2001).“Is Ecolabelling a Reliable Environmental Policy
Measure.” Environmental and Resource Economics, 18 (1), p. 113 -27.
(5) Kirchhoff, Stefanie
(2000). “Green Business and Blue Angels: A Model of Voluntary Overcompliance
with Asymmetric Information.” Environmental and Resource Economics, 15(4), p. 403-20.
(6) “Nordic Ecolabeling”
(2008). http://www.svanen.nu
Reviewer:
Alex
Russell, Colby College '08
Review:
Information
disclosure can be a potentially potent technique for effecting positive
environmental change, and can serve as either an effective alternative or a
valuable boon to regulatory instruments such as emissions standards and taxes
or market-based instruments such as tradable permits and deposit refunds.
(Tietenberg 1998) One disclosure
technique, environmental labels or “eco-labels,” informs consumers directly
that the product they are looking at has met a certain standard of
environmental friendliness.
Eco-labels such as the European Union’s EU Flower, Germany’s Blue Angel,
and the Nordic countries’ Nordic Swan, have the potential to empower consumers
to differentiate companies with relatively environmentally friendly practices
and to form a preference for products in line with those practices.
In recent years, the dramatic increase in
“green” products, as well as the implementation of eco-labeling campaigns
throughout the world, suggests that consumers do have a preference for
environmentally friendly products.
Survey results have tended to indicate that consumers are also willing
to pay more for such products – for example, for those carrying the Nordic Swan
eco-label in Denmark.
Nevertheless, some basic challenges to the
idea of eco-labeling must be addressed. While some labels, such as hazard
warnings on cigarette packages and organic labels on milk, have a direct impact
on the individual user and his or her well being, eco-labels such as the Nordic
Swan or those indicating dolphin-safe tuna or “fair trade” coffee rely on
consumers having some greater concern for the community and world at large,
beyond the degree to which that community impacts them. This altruistic reliance can lead to a
market failure, as the consumers of products do not always fully internalize
the impact of those products on the community as a whole. Some economists, however, such as
Amartya Sen, argue that the degree of this market failure is lessened as a
result of consumers’ “sympathy” and “commitment” to environmental causes. (Sen
1973)
Another cause for concern, raised by Cesare
Dosi and Michele Moretto, is that eco-labels could potentially lead to image
spill-over effects, which could actually result in more net pollution than
would occur without the eco-label.
This could happen if eco-labels projected a positive image not only on the
labeled green brand, but also on the product group as a whole, including
conventional and unlabeled competing brands. This could stimulate greater consumption across all
products, both green and not, and result in a negative overall impact on the
environment. (Dosi and Moretto 2001)
Yet another obstacle involves information
asymmetry. This issue, as assessed
by Stefanie Kirchhoff, revolves around the fact that environmental quality is a
“credence good,” and that the environmental impact of the good cannot be
immediately or accurately observed by consumers. As a result, consumers must place significant faith in
eco-labels to inform them of the environmental impact of the labeled products,
and thus firms have an incentive to overstate the environmental performance of
their products. Kirchhoff found
that in order for environmental labels to be credible in the minds of
consumers, they must be established and tested by unbiased third parties. Such a process would contribute to both
increased consumer faith in the labels and increased compliance with
environmental standards on the part of the manufacturer. (Kirchhoff 2000)
Despite these theoretical obstacles, dramatic
increases in environmentally friendly products, eco-labels, and apparent
consumer preferences for labeled products suggest that the eco-labeling trend
is likely to continue. One particularly strong eco-label, the Nordic Swan
label, was implemented by the Nordic Council of Ministers in 1989, and was
adopted by Denmark in 1997. As the
eco-labeling program had matured throughout other Nordic countries for nearly a
decade, Danish consumers were quick to adapt to the new labels. By 2000, three surveys investigating
the recognition of the Nordic Swan label among Danish consumers had found more
than half of the respondents recognized the Swan label.
In 2002 Thomas Bue Bjorner, Lars Garn Hansen,
and Clifford S. Russell published a study on the empirical impact of the Nordic
Swan on Danish consumers of toilet paper, paper towels, and detergents. By the end of 2000, the Nordic Swan had
appeared on 13 brands of toilet paper, 9 brands of paper towels, and 3-4 brands
of detergents. The analysis of the
study used weekly purchase diary data for 1596 Danish households from 1997 to
the beginning of 2001, and was based on a multinomial logit model used to
describe households’ choices among different brands. The aim of this model is to derive households’ willingness
to pay for eco-labeled products.
Explanatory variables in this model include the presence or absence of
the Nordic Swan label, the price of the brand, and whether the brand was
purchased on sale, as well as the level of advertising of each brand on Danish
television and/or in newspapers and magazines. Also included are indicators of results of consumer test
reports ranking different brands of detergents and paper towels. In addition, some of the products
covered in this analysis either received their Swan labels midway through the
study or had their labels revoked midway through the study. These cases allowed the study to
control for unobserved differences in the qualities of those brands and to
isolate the effect of the label.
The results of this study indicate that the
Nordic Swan eco-label has had an especially large impact on consumer demand for
labeled toilet paper and detergents.
Danish consumers showed a willingness to pay between 10% and 17% more
for Swan-labeled toilet paper than for the unlabeled competition, while similar
willingness to pay more was found for detergents. A much smaller effect was found for paper towels. One explanation provided by the study
is that many Danish households still use reusable dishcloths, and that
environmentally conscious consumers are likely to use these dishcloths, while
consumers unconcerned with environmental impact are more likely to buy paper
towels and less likely to care about the Swan label.
This study illustrates that in some cases
consumers are willing to pay significantly more for products that are deemed
environmentally friendly. This increased
willingness could by itself provide manufacturers with sufficient incentive to
produce “green” products that comply with the label standards. Furthermore, these labeling systems
could be used in conjunction with either a regulation policy such as a tax on
emissions or a market-based solution such as tradable permits, and could thus
help contribute to a firm’s overall incentive to pursue environmentally
friendly practices.
In the time since this study was conducted,
the Nordic Swan label has expanded to over 1200 products in 60 different
product groups, and increasing numbers of countries and organizations have
adopted eco-labels as a critical piece in multi-faceted approaches to improving
environmental sustainability. It seems likely that this trend will strengthen
and will expand to other areas of sustainable development