将下面改写的学术、精炼一点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 ta

The technology gap is calculated as the ratio of a firm's technology level in a given year to the highest technology level in its industry. To quantify positive treatment, the reciprocal is taken, indicating that a higher value indicates a smaller technology gap. The technology level is determined using the OP method to measure total factor productivity.