As you note the article does really a very poor job examining that connection. Interestingly, your assumption differed a bit from mine. My assumption about tha

As you note the article does really a very poor job examining that connection. Interestingly, your assumption differed a bit from mine. My assumption about that line was this: the availability of drugs for depression, and thus likely drug reps and salespeople, increased, providing greater incentives for profit through prescription, and thus increased diagnosis. Our biases at work.