Normalized CES supply systems: Replication of Klump, McAdam, and Willman (2007)
用替代软件复制了Klump等人2007年的研究，验证了其主要结果，并指出在替代弹性为1附近的最大值常是模型奇点导致的虚假现象，提醒实证研究者注意。
Summary The analysis of Klump, McAdam, and Willman ( Review of Economics and Statistics , 2007, 89 , 183–192) is replicated using alternative software. Their results are verified substantively and, in large measure, numerically. Contributions include a more explicit consideration of the nested testing structure than has appeared previously, and the appropriate means of imposing and testing the special case of logarithmic growth in technology. Also, plots of the likelihood serve to emphasize that maxima in the neighborhood of a unitary elasticity of substitution are often a spurious artifact of the singularity of the model at this point, of which empirical researchers should beware.