An activity is a personal service activity if it involves the performance of personal services in areas like health, law, engineering, architecture, accounting, actuarial science, performing arts and consulting.

FORBES: Taxes From A To Z (2013): P Is For Passive Activity Rules

The Acabiz platform allows businesses to easily and directly tap into the knowledge network of thousands of academics worldwide who all have highly specialized knowledge in fields such as architecture, engineering, law, medicine, science, financial, economics, and others.

FORBES: The Rise of the Knowledge Market

If the firms that do most of the hiring are not consultancies or investment banks, they may demand different skills: perhaps expertise in engineering or law, rather than a general understanding of business principles, acquired at great expense.

ECONOMIST: MBA programmes: Back to business school | The