1. Understanding the weather signal in national crop‐yield variability Frieler, Katja; Schauberger, Bernhard; Arneth, Almut; Balkovic, Juraj; Chryssanthacopoulos, James; Deryng, Delphine; Elliott, Joshua; Folberth, Christian; Khabarov, Nikolay; Müller, Christoph; Olin, Stefan; Pugh, Thomas A. M.; Schaphoff, Sibyll; Schewe, Jacob; Schmid, Erwin; Warszawski, Lila; Levermann, Anders 2017 Articles Crop yieldsCrops and climateAgricultural productivity--Climatic factorsCrop yields--Statistical methods