Middle managers and retail workers are the most active job hoppers, with staff turnover in the booming retail sector hitting 8.67 per cent in the first quarter. The overall rate for workers changing jobs rose to 2.99 per cent in the first quarter, up from the previous quarter's 2.37 per cent and 2.07 per cent a year ago. By sector, retailers suffered the highest staff turnover rates, followed by telecommunications at 6.69 per cent. The rate for middle managers and non-managerial staff hit 3.45 per cent. Lai Kam-tong, vice-president of the Hong Kong Institute of Human Resource Management, which surveyed staff movements at 115 companies with a total of 110,000 workers, said the results showed how the influx of mainland shoppers was leading shop staff to look for better jobs. 'Where people are spending money there are more opportunities,' Mr Lai said. 'If the economy continues to progress like it is today, the turnover rate may remain where it is now or go even higher.' Overall, first-quarter job vacancies stood at 2.42 per cent, up from 1.93 per cent in the previous quarter and 1.51 per cent a year ago.