A common monetary incentive system used by firms is performance-based pay where incentives are paid based on employees' productivity or output over a particular period of time. Some methods are commission-based where the employee, for example a salesperson, receives a payment directly correlated to their output level. Firms also pay additional wages or rewards for employees who work overtime and for their additional work above firm expectations. Expectancy theory implies that, provided employees place sufficient value on the monetary incentive to justify their extra effort and perceive that greater effort will result in better performance, such incentives can motivate employees to maintain high levels of effort and discourage shirking. This in turn increases the individual productivity of workers and the overall productivity of the firm.
