Compared with the other five common grey models that do not consider the lead-lag influence of the system, GAPM has better predictive ability. Therefore, the introduction of the new model constructed by using the lead-lag factor is reasonable and effective in the case of community group buying...
Lag函数为Lag(exp,N,defval),defval是当该函数无值可用的情况下返回的值。Lead函数的使用方法类似。 Lead和Lag函数也能够使用分组,下面是使用region分组的样例: SQL> select year,region,profit , lag (profit,1,0) over (PARTITION BY region order by year) as 51xit_exp from test; YEAR REGION PROFIT...
前者analysts coverage导致lead-lag effect减弱时generally,但是后者只会对industrial factor有影响(如果假设这样的former & latter调整模型:Model:Earnings = Industry factor+ Location Factor+ Firm-specific Factor, the industry & location factors of the former can predict the latter announcement separately)。 逻辑...
39March 30 2011 March 30 2011 Dep Var dayCAR factormodel leadlag mopre period DepVar dayCAR lnassets 445ln 721Municipal 423Deposits held totaldeposits 313Deposits held totaldeposits 045Deposits held 13states totaldeposits 418Constant 681R2 318318 318 318 318 318 May 27 2011 June 29 2011 Dep ...
aThat God shows you a lonely road is not to lead you to the desert, but to let yourself on the way to greatness. 上帝显示您一条偏僻的路不是带领您沙漠,而是让自己在途中到伟大。[translate] aTable 3 reports the results of the probit model of the selection equation where the 表3报告选择...