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We use a hedonic price model to simultaneously estimate the effects of street trees on the sales price and the time-on-market (TOM) of houses in Portland. Oregon. On average, street trees add $8,870 to sales price and reduce TOM by 1.7 days. In addition, we found that the benefits of street trees…
Author(s): G.H. Donovan, D.T. Butry
Keywords: street trees, urban forestry, hedonic valuation, Portland, Oregon
Source: Landscape and Urban Planning. 94: 77-83
Year: 2010
The authors estimate the relationship between trees and three crime aggregates (all crime, violent crime, and property crime) and two individual crimes (burglary and vandalism) in Portland, Oregon. During the study period (2005-2007), 431 crimes were reported at the 2,813 single-family homes in our…
Author(s): Geoffrey H. Donovan, Jeffrey P. Prestemon
Keywords: crime, trees, urban forestry, Portland, Oregon
Source: Environment and Behavior 44(1):3-30
Year: 2012
City dwellers can find many reasons to value neighborhood trees. The urban greenery provides relief from the built environment that many find appealing. In fact, a previous study found that a tree in front of a home increased that home's sales price by more than $7,000. Two new studies explore the…
Author(s): John Kirkland, Geoffrey Donovan
Keywords: urban trees, green spaces, human health, birth weight, crime, Portland, Oregon, Geoffrey Donovan
Source: Science Findings 137. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 6 p.
Year: 2011
Many cities have policies encouraging homeowners to plant trees. For these policies to be effective, it is important to understand what motivates a homeowner’s tree-planting decision. Researchers address this question by identifying variables that influence participation in a tree-planting program…
Author(s): Geoffrey H. Donovan, John Mills
Keywords: Census, Demographics, Education, Environmental Justice, Income, Oregon, Portland, Race, Urban Forestry
Source: Arboriculture & Urban Forestry
Year: 2014
For urban dwellers, trees soften a city’s hard edges and surfaces, shade homes and streets, enhance neighborhood beauty, filter the air, mitigate storm runoff, and absorb carbon dioxide. Trees may even reduce crime and improve human health. However, these benefits have not been well quantified,…
Author(s): Gail Wells, Geoffrey Donovan
Keywords: urban forestry, Portland, Sacramenton, value of street trees. Geoffrey Donovan
Source: Science Findings 126. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 5 p.
Year: 2010
Past research has examined the effect of urban trees, and other vegetation, on stormwater runoff using hydrological models or small-scale experiments. However, there has been no statistical analysis of the influence of vegetation on runoff in an intact urban watershed, and it is not clear how…
Author(s): Geoffrey H. Donovan, David T. Butry, Megan Y. Mao
Keywords: Economics, Hydrology, Oregon, Portland, Runoff, Stormwater, Trees, Urban Forestry Vegetation
Source: Arboriculture & Urban Forestry. 42(5): 318–328
Year: 2016
Air quality is a critical issue affecting the health of billions of people worldwide, yet often little is known about what is in the air we breathe. To reduce air pollution’s health impacts, pollution sources must first be reliably identified. Otherwise, it is impossible to design and effectively…
Author(s): Natasha Vizcarra, Sarah Jovan, Demetrios Gatziolis, Vicente Monleon
Keywords: Moss, Portland, air quality, cadmium
Source: Science Findings 205. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 5 p.
Year: 2018