nonmory 发表于 2014-7-11 15:50 
=_____=）我也是菜鸟。。不过我觉得。。panel或者pooled是指的数据的情况。。和你选用的计量模型没关系吧。 ...
我的数据是三年上市公司的年报
如果你模型不加入时间控制的话，那时间序列怎么说呢？
刚问了一个在澳洲读经济博士的师姐，她说不加YEAR DUMMY就是POOLED DATA.
但是我又看了这个，又糊涂了
Pooled Cross Sections
Population surveys - each period, Statistical Bureau
independently samples the population
) At each period, the sample is di erent.
these are independent cross-sections, but we can take time
into account.
Panel Data
Each year, the European Community Household Panel
surveys the same individuals on a range of questions:
income, health, education, employment, etc.
These are cross-sections with time order.
We have observations for each individual with temporal
ordering.
Sample does not change.
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