You have analyzed a data of companies in Killeen, TX and found that the pay level of large firms is likely to be higher than that of small firms. Two possible reasons for this finding are that 1) larger firms tend to be more profitable and that 2) workers in larger firms are more difficult to monitor. 1) is related to the concept of (a)_________________________. 2) is related to the concept of (b)_________________________. Group of answer choices (a) compensating wage differentials, (b) rent sharing model (a) rent sharing model, (b) compensating wage differentials (a) rent sharing model, (b) efficiency wage theory (a) efficiency wage theory, (b) rent sharing model