OSHMAN'S <OSHM> CITES WEAK REGIONAL ECONOMIES Oshman's Sporting Goods Inc said earnings for the fourth quarter ended January 31 were affected by the weak economies of Texas, Oklahoma and Louisiana, resulting in a drop in net earnings to 5,415,000 dlrs or 92 cts a share from 7,730,000 dlrs or 1.28 dlrs a share for the year-ago quarter. The company also said sales on the West Coast were hurt by late snows and poor skiing conditions. Same-store sales declined 3.2 pct for the quarter and 2.2 pct for the year. For the full year, Oshman's net earnings fell to 2,664,000 dlrs or 45 cts a share, from 8,536,000 dlrs or 1.40 dlrs a share. In 1986, the company said it opened nine stores and closed three. At year-end, the company said it was operating 188 Oshman's stores and 27 Abercrombie and Fitch stores.