By Paul Ormerod Oasis tickets have stirred controversy, but the question of how prices are set in a market goes all the way back to Alfred Marshall and Francis Edgeworth, says Paul Ormerod The pricing of tickets for the forthcoming Oasis tour has stirred up a major controversy. This is not just on social media. Lisa Nandy, the culture secretary, has promised it will be included in a government review of pricing at gig events. One of her cabinet colleagues, Lucy Powell, has expressed personal outrage at the amount she had to pay for her tickets. Nandy has received the support of the Competition…