Local: city agencies
National: federal agencies, research centers
International: international organizations
Note: Not all data is available at the geographic level you need. Some data is only available at the state or county level.
Note: Some frequencies may need to be calculated.
Unit of Analysis
Institutional Level: company, health facility, school
Production Level: automobiles, commodities
Cross sectional: collected at the same point of time for several individuals.
Longitudinal/Panel: data collected at a sequence of time points for each of a sample of individuals.
Time Series: data collected at a sequence of time points, usually at a uniform frequency.
Pooled cross sectional time series: mixture of time series data and cross-section data.
(Adapted from: https://libguides.bc.edu/dataservices/sources)