Mansfield CA, Pattanayak SK, McDow W, MacDonald R, Halpin P. Shades of green: measuring the value of urban forests in the housing market. J Forest Econ. 2005 Dec;11(3):177-99. doi: 10.1016/j.jfe.2005.08.002
Finkelstein EA, Ruhm C, Kosa KM. Economic causes and consequences of obesity. Annu Rev Public Health. 2005;26:239-57.