Table 1.

Measures for variables and sources for data.

variables and measures	sources
dependent variable (in table 3)
Deforestation rate. MODIS imagery for entire areas of interest combined with Landsat Thematic Mapper images for selected areas generated the estimates of forest losses from 2000 to 2005. The losses were then divided by forest area in 2000 in order to obtain the deforestation rate	Hansen et al. [18]
independent variables (in table 3)
Forest stock density. This measure is derived from estimates of biomass carbon stocks	Saatchi et al. [21]
Imports of cereals per capita, 2000. Tons of cereals imported in 2000/population of the nation, 2000	Earthtrends (http://earthtrends.wri.org/)
Oil and gas receipts as a proportion of all receipts from exports, 2000. The proportion of total export earnings from fuels and minerals for a country in 2000	UNCTADstat (http://unctad.org/en/Pages/Statistics.aspx)
Proportion of the population living in an urban area, 2000	United Nations Population Division of the Department of Economic and Social Affairs, 2007, world population prospects: the 2006 revision and world urbanization prospects: the 2005 revision (http://esa.un.org/unpp)
Proportion of lands unsuitable for agriculture. Percentage of the national land area that is considered unsuitable for agricultural production	FAO–IIASA Project on Global Agro-ecological Zones (http://www.iiasa.ac.at/research/LUC/GAEZ/index.htm)
Population growth, 1990s. (population, 2000 – population, 1990)/rural population, 1990	Population Division, Department of Social and Economic Affairs, United Nations.
other variables (in table 2)
Gross domestic product, per capita, 2000	Penn World Tables (http://pwt.econ.upenn.edu/php_site/pwt70/pwt70_form.php)
population, 1990 and 2000