A recent study by students at Boston College, reported self-employed people are the happiest of employed workers, and yet, they have less stable income, more stressful jobs, and work longer hours than people who work for established companies as employees.  Stress comes from dealing with the unknown or ambiguity, dealing with cashflow issues, finding new customers and products, while developing people to execute.  Of interest, corporate execs are lower in happiness than the self-employed.  In another study across