LOS ANGELES – Supermarket operators involved in a 4-month-old strike-lockout with Southern California grocery clerks rejected an offer from the workers' union Wednesday to have its members return to work immediately if the markets would agree to binding arbitration. In a joint statement issued shortly after union officials announced their offer, Albertsons Inc., Kroger Co. and Safeway Inc. rejected the union's proposal, calling it an effort to "shift the focus" away from the union's "inability" to negotiate a settlement. "Labor disputes are resolved by face-to-face negotiations with people familiar with the issues," the companies' statement said. "Only the parties to...