The federal government has been asked to conduct a study into the adverse affects of hypermarkets on local retailers and small traders. Abdul Rafique Karim, deputy president of The Penang Malay Chamber Of Commerce (PMCC) explained yesterday that as the number of hypermarkets has mushroomed, the number of smaller traders has plummeted. "Maybe the government can consider imposing regulations such as requiring hypermarket shoppers to purchase a minimum quantity or allowing only wholesalers to buy from hypermarkets," he suggested.