Sample: 2007M01 2010M12
Included observations: 4800
Cross-sections included: 100
Total pool (balanced) observations: 480000

  我是四年的数据  按照月度计算  100只债券     算下来是4800个数值   那个TOTAL pool obserbations 显示是4800乘100=480000，  请问这应该怎么解释啊  可能是我不太理解这个pool的原理   求解，帮忙详细解释一下   免得我论文答辩时被挂掉 谢谢