Leading sports shoe chain Foot Locker Inc on Thursday reported a 14 per cent hike in second quarter net earnings on higher sales and said it is working with Nike Inc on a new footwear line. The New York-based operator of more than 3,600 stores in 16 countries posted earnings for the 13 weeks to August 2 of $37 million, or 25 cents a share, excluding special items, compared with a profit of $33m, or 22 cents, last year.