Tiffin, J. Richard; Balcombe, Kelvin George - International Association of Agricultural Economists - IAAE - 2003
Convential SUR estimation of the AIDS is shown to lead to small sample bias and distortions in the size of a Wald test for symmetry and homogeneity when the data are cointegrated. A fully-modified estimator is developed in an attempt to remedy these problems. It is shown that this estimator...