YOU can’t say law firms aren’t trying.

At the Chicago office of Perkins Coie, partners recently unveiled a “happiness committee,” offering candy apples and milkshakes to brighten the long and wearying days of its lawyers. Perhaps this will serve as an example to other firms, which studies show lose, on average, nearly a fifth of their associates in any given year, in an industry in which about 20 percent of lawyers over all will suffer depression at some point in their careers.

Last year, Cravath, Swaine & Moore tried a more direct approach, offering associates an added bonus of as much as $50,000, on top of regular annual bonuses that range from $35,000 to $60,000.

At the august Sullivan & Cromwell, partners in 2006 began a program, groundbreaking in white-shoe firms, encouraging the uttering of “thank you” and “good work” to harried underlings, as reported in The Wall Street Journal.

Probably not a bad move at a firm that had been hemorrhaging associates at a rate of about 30 percent a year. (The rate dipped below 25 percent in the year after the program was started, although Fred Rich, a partner, said better etiquette was simply an element in a “very broad agenda” focused on more open communication.)