Poisson-Poisson distribution Poisson-Binomial distribution Compound distribution
Poisson—Poisson分布Poisson-二项分布复合分布
Rosin-Rammler distribution and amendatory Gauss distribution
space distribution -regularities of distribution
ability to pay for health care
ability to pay for health services
Ability to pay principle
Additional Senior-increases over Basic Pay Rate
and problems necessary to pay attention
approach of willingness to pay