A study published in the journal Science, led by Holly Gibbs of the University of Wisconsin-Madison, found that the moratorium on forest conversion established by Brazilian soy giants in 2006 dramatically reduce deforestation for soy expansion in the Amazon, and have been more effective in cutting forest destruction than the government's land use policy in the region. The study is based on spatial analysis across thousands of farm in the Brazilian Amazon and cerrado, a woody grassland, and researchers compared forest loss before and after the moratorium was established.