Before revision:  In such an environment, laissez-faire may result in a highly unfair and inefficient outcome---myopic firms are reluctant to hire minority workers because the lack of data about minority workers prevents accurate estimation of their performance.
After revision:  In such an environment, laissez-faire may result in a highly unfair and inefficient outcome -- myopic firms are reluctant to hire minority workers because the lack of data about minority workers prevents accurate estimation of their performance.