margolin: Margolin et al. (1981) present data from an Ames Salmonella assay, where y is the number of revertant colonies observed on a plate given a dose y of quinoline. The data were subsequently analysed by Breslow (1984), Lawless (1987) and Saha and Paul (2005).

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Data frames each with the following variable.

`y`

a numeric vector showing the number of revertant colonies observed on a plate given a dose x of quinoline.

`x`

a numeric vector showing a a dose x of quinoline.

Data sets usefull for the GAMLSS booklet

Breslow, N. (1984) Extra-Poisson variation in log-linear models. *Applied Statistics*, **33**, 38-44.

Hand *et al.* (1994) *A handbook of small data sets*. Chapman and Hall, London.

Lawless, J.F. (1987) Negative binomial and mixed Poisson regression. *The Canadian Journal of Statistics*,
**15**, 209-225.

Margolin, B.H., Kaplan, N. and Zeiger, E. (1981) Statistical analysis of the Ames salmonella/microsome test.
*Proceedings of the National Academy of Science*, U.S.A., **76**, 3779-3783.

Saha, K. and Paul, S. (2005) Bias-Corrected Maximum Likelihood Estimator of the Negative Binomial Dispersion
Parameter.
*Biometrics*, **61**, 179-185

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