Standards And Practices

Do you write to a specific pre-determined manuscript length? Does your publisher require you to stay within a word-count range?
Well, folks, all I have is the one. So far, anyhow. I can elucidate the difference between being self-directed with no limit for my first novel and having very tight constraints on my short story work, of which this year I'll have a few in print.
As Deitrich mentions, the sweet spot I had heard from many sources is over 50,000 words, settling somewhere less than 80,000...