If a firm switches from hourly pay to piece rates, but with income guaranteed not to fall below what workers would have made under the old system of hourly pay, what does the "sorting effect" predict? Group of answer choices Lower-productivity workers will be attracted to the firm. Higher-productivity workers will be attracted to the firm. The existing workers who were originally paid on hourly wages will work harder. The existing workers who were originally paid on hourly wages will work less hard. None of the above