citations {BradleyTerry2} | R Documentation |

## Statistics Journal Citation Data from Stigler (1994)

### Description

Extracted from a larger table in Stigler (1994). Inter-journal citation counts for four journals, “Biometrika”, “Comm Statist.”, “JASA” and “JRSS-B”, as used on p448 of Agresti (2002).

### Usage

```
citations
```

### Format

A 4 by 4 contingency table of citations, cross-classified by the
factors `cited`

and `citing`

each with levels `Biometrika`

,
`Comm Statist`

, `JASA`

, and `JRSS-B`

.

### Details

In the context of paired comparisons, the ‘winner’ is the cited journal and the ‘loser’ is the one doing the citing.

### Source

Agresti, A. (2002) *Categorical Data Analysis* (2nd ed). New
York: Wiley.

### References

Firth, D. (2005) Bradley-Terry models in R. *Journal of
Statistical Software* **12**(1), 1–12.

Turner, H. and Firth, D. (2012) Bradley-Terry models in R: The BradleyTerry2
package. *Journal of Statistical Software*, **48**(9), 1–21.

Stigler, S. (1994) Citation patterns in the journals of statistics and
probability. *Statistical Science* **9**, 94–108.

### See Also

### Examples

```
## Data as a square table, as in Agresti p448
citations
##
## Convert frequencies to success/failure data:
##
citations.sf <- countsToBinomial(citations)
names(citations.sf)[1:2] <- c("journal1", "journal2")
## Standard Bradley-Terry model fitted to these data
citeModel <- BTm(cbind(win1, win2), journal1, journal2,
data = citations.sf)
```

*BradleyTerry2*version 1.1-2 Index]