When was the last time you used a travel agent? I asked that question in my book “Decoding Air Travel.” Last month, President Obama asked it, too, and the American Society of Travel Agents speedily protested. So let’s examine the modern — or perhaps not modern enough — travel-agency system and the value it brings.

Many young people don’t even remember the time when using a travel agent was the only practical way to book a trip. While many consumers today book their own travel, using travel agencies is still quite prevalent in the corporate world. However, many business travelers I know are unhappy with their company’s travel agency. It’s clear the current system isn’t working well anymore for a variety of reasons. Without taking sides, let’s look at those reasons from the perspective of travel agencies and their customers…