R: Poliomyelitis cases in US

polio {gamlss.data} | R Documentation

## Poliomyelitis cases in US

### Description

Poliomyelitis cases reported to the U.S. Centers for Disease Control for the years 1970 to 1983, that is, 168 observations.

### Usage

    data(polio)

### Format

The format is: Time-Series [1:168] from 1970 to 1984: 0 1 0 0 1 3 9 2 3 5 ...

### Details

The data were originally modelled by Zeger (1988) who used a parameter driven approach, in which a first order autoregressive model was used for the latent process, to conclude that there is evidence of a decrease in the polio infection rate. The data were analysed also by Li (1994), Zeger and Qaqish (1988), Davis et al. (1999), and by Benjamin et al (2003).

### Source

Zeger (1988) w

### References

Benjamin M. A., Rigby R. A. and Stasinopoulos D.M. (2003) Generalised Autoregressive Moving Average Models. J. Am. Statist. Ass., 98, 214-223.

Davis, R. A., Dunsmuir, W. T. M. and Wang, Y. (1999), “Modelling Time Series of Count Data,” in Asymptotics, Nonparametrics and Time Series (ed Subir Ghosh): Marcel Dekker

Zeger, S. L. (1988), “A Regression Model for Time Series of Counts,” Biometrika, 75, 822-835.

Zeger, S. L. and Qaqish, B. (1988), “Markov Regression Models for Time Series: A Quasi-likelihood Approach,” Biometrics, 44, 1019-1032.

### Examples

    data(polio)
    plot(polio)

[Package gamlss.data version 5.1-0 Index]