Nice piece by Tim Harford in the FT about charity and visibility of suffering.

Here is the difficulty: faced not with a specific baby right in front of us, but some unnamed baby far away, £300 suddenly seems like a steep price tag. That £300 is a plausible estimate for the cost of enough mosquito nets or health education to save a child’s life in sub-Saharan Africa. Few Britons donate that much to charity each year.