Nikkei fails to arrest slide as economic worries offset US relief

* Japanese stocks down 0.2 percent * Investors cautious on Europe; eye BOJ for response * Recruit shares rise further after strong debut By Thomas Wilson TOKYO, Oct 17 (Reuters) - Japanese stocks declined on Friday morning, failing to arrest this week's sharp slide as investor nervousness about slowing global growth eclipsed relief over a set of upbeat data from the United States. The Nikkei fell 0.2 percent to 14,714.32 at 0128 GMT and is on track to post its biggest weekl