Identify some typical research objectives for secondary-data studies. What is model building? How does it use secondary data? What are some examples of different applications of model building in marketing research?
What would be a source for the following data?
a. Population, average income, and employment rates for Oregon
 b. European trends in automobile ownership
c. Divorce trends in the United States
d. Use of Facebook and Twitter by age and region
e. Annual sales of the top ten U.S. fast-food companies
 f. Top ten websites ranked by number of unique visitors
g. Attendance at professional sports events held in Canada and China