The problem is like below:
Variable | Obs Mean Std. dev. Min Max
-------------+---------------------------------------------------------
HHNO | 0
PPN | 0
QRTYP | 0
SFAREAGP1_MT | 0
SFAREAGP2_MT | 0
However, there are data observation in excel, for example, there are PPN="01","02","03" and SFAREAGP2_MT="9","5" etc
Once I imported this excel data into stata, I entered sum commands and they gave me all 0 observation
Variable | Obs Mean Std. dev. Min Max
-------------+---------------------------------------------------------
HHNO | 0
PPN | 0
QRTYP | 0
SFAREAGP1_MT | 0
SFAREAGP2_MT | 0
However, there are data observation in excel, for example, there are PPN="01","02","03" and SFAREAGP2_MT="9","5" etc
Once I imported this excel data into stata, I entered sum commands and they gave me all 0 observation
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