Bivpois Library of Karlis and Ntzoufras

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-- Functions --

bivpois.table	Bivariate Poisson Probability Function (in Tabular form) using retrospective relationships
pbivpois	Probability function (and logarithm) of Bivariate Poisson
simple.bp	Fitting a simple bivariate Poisson model (with no covariates) using the EM algorithm
lm.bp	Fitting a log-linear Bivariate Poisson model (with covariates ) using the EM algorithm
lm.dibp	Fitting a log-linear diagonal inflated Bivariate Poisson model (with covariates ) using the EM algorithm
newnamesbeta	Function used internally in lm.bp & lm.dibp for naming beta parameters
splitbeta	Function used internally in lm.bp & lm.dibp for spliting beta parameters

-- Datasets - Examples --

ex1.sim	Simulated data of example 1 of Karlis and Ntzoufras (2004)
ex2.sim	Simulated data of example 2 of Karlis and Ntzoufras (2004)
ex3.health	Health care data from the book of Cameron and Trivedi (1998). Example 3 in Karlis and Ntzoufras (2004)
ex4.ita91	Football (soccer) data of the Italian League for season 1991-92. Data were originally analysed in Karlis and Ntzoufras (RSSD, 2003). This is example 4 in Karlis and Ntzoufras (2004).

-- Additional Help --

bpformulas

Help file with instructions on how to construct formulas for lm.bp and lm.dibp

References

1. Karlis, D. and Ntzoufras, I. (2004). Bivariate Poisson and Diagonal Inflated Bivariate Poisson Regression Models in S. (submitted). Technical Report, Department of Statistics, Athens University of Economics and Business, Athens, Greece.

2. Karlis, D. and Ntzoufras, I. (2003). Analysis of Sports Data Using Bivariate Poisson Models. Journal of the Royal Statistical Society, D, (Statistician), 52, 381 – 393.

Authors Information

1. Dimitris Karlis, Department of Statistics, Athens University of Economics and Business, Athens, Greece, e-mail: karlis@aueb.gr .

2. Ioannis Ntzoufras, Department of Statistics, Athens University of Economics and Business, Athens, Greece, e-mail: ntzoufras@aueb.gr .