People who refuse to rest honorably on their laurels when they reach retirement age seem very admirable to me.

It's more a stage than an age. The concept of retirement at age 65 is going out the window. Many people are opting to stop working earlier than later. 65 is an irrelevant limit now.

How long can you broadcast on radio? Is there a mandatory retirement age? Can you go on forever?

If you're retirement age or nearing your retirement age, you need to be a little more reserved.

On the contrary, mortality improved with increasing age at retirement for people from both high and low economic groups.

The hardest people to convince they are at retirement age are children at bedtime