. . "Does an increase in the price of a necessity reduce welfare more than an equivalent increase in the price of a luxury? [By] Joseph P. Newhouse"@en . . . . . . . . . . . . . . "Does an increase in the price of a necessity reduce welfare more than an equivalent increase in the price of a luxury?"@en . "Does an increase in the price of a necessity reduce welfare more than an equivalent increase in the price of a luxury?" . . . .