Stata's hausman command repeatedly returned "V_b-V_B is not positive definite" when using my stored xtreg, fe and xtreg, re estimates. For this reason, I would like to use the artificial regression approach. However, my panel is not balanced. Does this mean that the results are invalid...
st: "V_b-V_B is not positive definite" / XTOVERID FromAlexandra Guisinger <Guisinger.1@nd.edu> Tostatalist@hsphsun2.harvard.edu Subjectst: "V_b-V_B is not positive definite" / XTOVERID DateWed, 3 Sep 2008 09:57:19 -0400
意思,暗示 import vt. importance n.重要(性) important a.1.重要的,重大的 impossible a.1.不可能的,办不到 的 impress vt.(on) impression n.1.印象, improve v.改善,改进 improvement n.改进,进步 in prep.1.在……里 inch n.英寸 incident n.事件,事变 incline v.1.(使)倾斜 include vt.包括...
但是,莱布尼兹是一个理智的哲学家,他不能忍受观照的形式,可以先行于事物,且规定着事物的可能性;当他假定:事物是什么样子,我们看到的就是什么样子的时候(尽管是以含混的表示),那么,这个鉴定,确实很公正。 But as sensuous intuition is a peculiar Edition: Muller_1922; Page: [268] subjective condition on whic...
但是unsympathetic 这个意思其实在老GRE 的填空题目中已经考 察过,题目如下: The characterization of historical analysis as a form of fiction is not likely to be receivedby either historians or literary critics, who agree that history and fiction deal withorders of experience. (A) quietly.. ...
The main task is to strengthen the economy. 此句中学生用“strengthen”和“economy”的错误搭配来表达“增强经济”的意思。之所以出现这样的错误,是因为学生把“strengthen”等同于汉语中的“增强”,从而生成了错误搭配。朗文高级英语词典中对于“strengthen”给出的解释是:“使坚强、使更加坚固”;而对于“economy”...
(28)It is definitel true that behind ever dail activit lies a tive. As a atter f fact, we can achieve nthing withut a realistic gal. (29)Everbd shuld have a gal in his life, because ailess life wastes ur energ and tie.
Subject st: "V_b-V_B is not positive definite" / XTOVERID Date Tue, 2 Sep 2008 13:20:53 -0400My replies don't seem to be linking to the thread ("V_b-V_B is not positive definite" / XTOVERID) so just a quick summary. Even using the sigmamore or sigmaless option for hausman...