Exact(18)
To arrive at our final sample we also drop observations from Scotland and Northern Ireland.
We also drop observations with missing data on the variables of interest.
I first drop observations for which information on the job variable is missing.
To avoid biases associated with left censoring (e.g., Heckman and Singer 1984) we drop observations where the individual's first service spell was prior to SFY 2000 (2782 observations).
From this original sample I drop observations with missing or non-positive values for the number of employees, value added, or capital stock.
This survey information is missing for some students and schools and we generally drop observations containing missing values for our main variables.
Similar(42)
Pressure drop observation showed no significant differences between the two designs.
When let loose, Mr. Pamuk drops observations like this with deceptive ease.
The predictions from the flow oscillation model agree well with the experimental pressure-drop observations across a flow meter and a microchannel heat sink.
I dropped observations with nominal hourly wages exceeding 1000 dollars.
Dropping observations, including item non-response, leave us with a final sample of 3592 individuals.2.2
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