In the short term, California's 2008 egg-layer referendum seems to have widened the historical gap between that state's market and other parts of the country. It has also led to another attempt at new federal legislation.We reported on 29 December that California's infamous egg-layer referendum of 2008 would come home to roost this year. As of 1 January 2015, all eggs sold there must comply with the regulations that were part of that referendum, specifically pertaining to battery cages. A subsequent state law expanded that requirement to all eggs sold within the state even if produced outside its borders. Currently, California is the largest consumer of eggs of all 50 states in the nation. The new regulations were subject to a lawsuit from...