The government of Penglai, an isolated island, proposed eliminating outdoor advertising except for small signs of standard shape that identify places of business
Some island merchants protested that the law would reduce the overall volume of business in Penglai, pointing to a report done by the government indicating that in every industry the Penglai businesses that used outdoor advertising had a larger market share than those that did not
presupposing that there are no good reasons for restricting the use of outdoor advertising in Penglai