The impact of retiring on mental health is very hazy. So many considerations factor into whether people retire that it’s difficult to predict how it will go. Some are uplifted by finally getting out from under a bad situation while others gets depressed because they’ve lost their purpose or important social connections. Reactions to being retired depend on, among other things, the person’s health, whether the job is fulfilling or physically very strenuous, and whether they’ve planned for how to fill the days. So it seems important to figure out why some people thrive in retirement while others become depressed. Financial considerations are, of course, central to the timing. But money aside, my own experience watching 60-something friends tells m…