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 "incentive effect" predict? Group of answer choices The existing workers who were originally paid on hourly wages will work harder. Higher-productivity workers will be attracted to the firm. Lower-productivity workers will be discouraged from applying to the firm. The lowest-productivity workers at the firm will work harder. Incentives will weaken for all workers