One should not export basic foods, such as wines, oils, and fine flour from the Land of Israel, if this will lead to shortages and high prices. One may not leave the Land of Israel and go live outside the Land, unless food prices have doubled. Rabbi Shimon says that this is permitted only when one can't find wheat at all, but if wheat is available, even at very high prices, one should stay, provided that he can afford to feed his family.