TY  - JOUR
TI  - An Efficient Method of Estimating Seemingly Unrelated Regressions and Tests for Aggregation Bias
AU  - Arnold Zellner
JO  - Journal of the American Statistical Association
PY  - 1962
VL  - 57
IS  - 298
DO  - 10.1080/01621459.1962.10480664
UR  - https://doi.org/10.1080/01621459.1962.10480664
ER  -