Breban R., Riou J., and Fontanet A. (2013). Interhuman Transmissibility of Middle East Respiratory Syndrome Coronavirus: Estimation of Pandemic Risk. (Free registration required.) Lancet. 382(9893):694-9.
The authors calculated the rate of MERS CoV introductions into the population from outbreaks in Jordan and Al Hasa. They modeled two potential scenarios: one where there are many introductions, but only moderate transmissibility, and another with few introductions but higher transmissibility. Their analysis suggested that, at the time of the study, MERS-CoV did not yet have pandemic potential.