The impact of rising global food prices on consumer welfare is investigated. A quadratic AIDS model is estimated using data spanningcountries at various levels of economic development. Statistical comparison suggests the QUAIDS model is preferred over the non-linear AIDSmodel. Estimated...

Contributed Paper prepared for presentation at the International Association of Agricultural Economists Conference, Beijing, China, August 16-22, 2009

In the analysis of bilateral trade flows, reported trade of zero or missing observations are quite common and this is a problem when estimating log-linear gravity equations. This has caused many researchers to either ignore the zero trade flows or to replace the zero with a small positive...