I am working with data comparing commuting times from the 1980, 1990, and 2000 decennial censuses and have a question regarding the large number accumulated at ‘0’.
In the data description for TRANTIME it lists a variable specific code such that ‘000 = N/A’.
After downloading the data as a .dat file I noticed all values have leading zeros and I cannot differentiate between those with a true zero commute time and those who should be treated as ‘N/A’.
Additionally, the format file for Stata imports the TRANTIME variable as an integer which sets all values to simply ‘0’. This is also the case when downloading data as a Stata formatted dta file.
Is it possible using the data as is, or perhaps an additional variable, that can be used to differentiate between the two groups?
Thanks for any help you can provide.