Description Usage Format Details Source Examples

The data are simulated from a bivariate seemingly unrelated regressions
model with two response variables (*Y_1*, *Y_2*) and two
covariates (*X_1*, *X_2*). The sample is only of size 8.

1 |

A list providing a summary of the data. The list contains:

`sur$means` | : | the mean vector, |

`sur$stddev` | : | the vector of standard deviations, |

`sur$corr` | : | the correlation matrix, and |

`sur$n` | : | the sample size. |

The data were used by Drton \& Richardson (2004) to illustrate the possibility of a multimodal likelihood in seemingly unrelated regressions.

Drton, M. \& Richardson, T.S. (2004) Multimodality of the likelihood
in the bivariate seemingly unrelated regressions
model. *Biometrika* 91(2): 383-392.

1 2 3 4 5 |

```
X1 X2 Y1 Y2
0.49 -0.37 0.62 0.35
X1 X2 Y1 Y2
0.91 1.93 1.60 4.01
X1 X2 Y1 Y2
X1 1.0000 -0.2957 0.7057 0.0814
X2 -0.2957 1.0000 0.2468 0.9120
Y1 0.7057 0.2468 1.0000 0.4840
Y2 0.0814 0.9120 0.4840 1.0000
[1] 8
```

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