trends

Why are US presidents taller than ordinary Americans?

From George Washington to Barack Obama, US presidents have been 6 to 8 cm taller than average AmericansMany websites, including Wikipedia, compare the height of US presidents with their main contenders and find that, in most cases, the elected president is the taller of the two. This post takes the observation a bit further –…

Amazing maize…

The post analyses current trends of maize yield and production, and tries to look ahead and see where changes are likely in the future. It is related to a previous post on Global food supply trends in 2014, and beyond!  This note was first published in the August 2014 CropWatch bulletin, pages 85 to 88. The…

Recent rainfall and cattle trends in the Central-Western Sahel

  The graph shows recent trends of climate, urbanisation and a livestock production index (meat and milk). The data stem from various FAO sources: FAOSTAT for the production and population data, while the National Rainfall Indices (NRI) come from CLIMPAG. All variables are aggregated at the level of the “central-Eastern Sahel” by combining data from…