I did a lot of consulting for a very large automotive firm about 10 years ago. I turned up at one meeting and every invitee had arrived, unusually. Then - latte

I did a lot of consulting for a very large automotive firm about 10 years ago. I turned up at one meeting and every invitee had arrived, unusually. Then - lattes, cappuccinos, and sandwiches arrived! Gleefully, they told me: because you're here, we get to order coffee and food. They also had a new rule about "no food for internals only". As all economists know, people respond to incentives. You invite externals, you get free food|coffee|biscuits. Design your incentives very carefully.