Long term testosterone levels from abstaining ejaculation:
The only study I could find measuring testosterone levels of men who didn't ejaculation for extended periods of time, was research done by Chinese researchers, J Zhejiang Univ Sci. 2003 Mar-Apr;4(2):236-40. The study was done on 28 men who were told to not ejaculate for entire week. It was found that for first 6 days testosterone levels did not change. However, on the 7th day of abstaining, testosterone levels jumped up by nearly 50%. It then declined quickly after that day, therefore abstaining from ejaculation had no long term rising effect.
google is a genius!