After four years of inactivity, Bangkok-based Robinson department store group will expand next year following the completion of $463m (Baht 19bn) in debt restructuring, the Bangkok Post reported today. The investment, expected to involve several hundred million baht, will be the largest since the mid-1997 economic crisis, which hit Thailand's third-largest department store chain badly. The expansion will primarily involve adding about 8,000 sq ms of retail space at four stores - Ratchadaphisek, Si Racha, Udon Thani and Rangsit.Renovations, but the company's Srinakarin and Fashion Island stores will also be given a new image.