Russia is said to be imposing restrictions on the export of wheat, corn, and barley from mid-February onward. The move follows restrictions on soybean exports and other products may incur informal hurdles to sales abroad. The goal is to stem domestic food price inflation. Restrictions on soybeans and corn will have little impact on global markets since Russia is a relatively small supplier.  Restrictions on wheat would have an impact under certain circumstances given that Russia supplies one-fifth of world’s wheat, but 40 percent of world production is already sitting as a surplus. The one crop where Russia could have impact is in the price of barley. Only about 12 percent of global barley production is in surplus and Russia has...