This is a reference document for designing food consumption and expenditure modules in household surveys. Food makes up the largest share of total household expenditure in low-income countries and, ...

Jeff Carlson writes about mobile technology for CNET. He is also the author of dozens of how-to books covering a wide spectrum ranging from Apple devices and cameras to photo editing software and ...

Biology is mind-bogglingly complex. Even simple biological systems are made up of a huge number of components that interact with one another in complicated ways. Furthermore, systems vary in both ...