将下面改写成一句Drawing from Yang et al 2018 the technology gap is measured by the ratio of firms technology level in year t to the highest technology level in its industry and then the reciprocal is taken f

The technology gap is determined by the ratio of a firm's technology level in year t to the highest technology level in its industry, as measured by Yang et al. (2018), and then the reciprocal is taken for positive treatment, indicating that a larger value corresponds to a smaller technology gap, where the technology level is measured using the OP method as total factor productivity.