Peter, the President of a Small Company, Wants His Employees

Short Answer

Peter, the president of a small company, wants his employees to be aware that they should act ethically. Which of the following has proven most effective in improving ethical behaviour in a business firm?
Reward managers who have secured an advantage for the firm, even if their behaviour might be seen by some people as unethical
Demonstrate top management commitment to high ethical standards
Do not publicly bring attention to unethical behaviour, instead deal with it privately
Fire all unethical employees
Do nothing to reinforce the undesirable behaviour and it will not be repeated