Between June 2010 and May 2011, international maize and wheat prices roughly doubled; food prices peaked in February 2011.
Torero (2016)
Torero, M. (2016). Alternative mechanisms to reduce food price volatility and price spikes: Policy responses at the global level. In M. Kalkuhl et al. (Eds.), Food Price Volatility and Its Implications for Food Security and Policy. Springer. https://opsaa.iica.int/en/resource-2747-alternative-mechanisms-to-reduce-food-price-volatility-and-price-spikes-policy-responses-at-the-global-level