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.
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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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